2.6.36-rc5 i915 regression

2.6.36-rc5 i915 regression

[Johannes Hirte]

With 2.6.36-rc5 and later my netbook is unusable. After login on X (KDE) the
screen gets totally garbled, under X and console too. The log shows me this
messages:

Sep 30 21:20:01 netbook kernel: render error detected, EIR: 0x00000010
Sep 30 21:20:01 netbook kernel: page table error
Sep 30 21:20:01 netbook kernel: PGTBL_ER: 0x00100113
Sep 30 21:20:01 netbook kernel: [drm:i915_report_and_clear_eir] *ERROR* EIR stuck: 0x00000010, masking
Sep 30 21:20:01 netbook kernel: render error detected, EIR: 0x00000010
Sep 30 21:20:01 netbook kernel: page table error
Sep 30 21:20:01 netbook kernel: PGTBL_ER: 0x00100113
Sep 30 21:20:02 netbook kernel: [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung

I've bisected it to this commit:

commit e259befd9013e212648c3bd4f6f1fbf92d0dd51d
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri Sep 17 00:32:02 2010 +0100

    drm/i915: Fix Sandybridge fence registers
    
    With 5 places to update when adding handling for fence registers, it is
    easy to overlook one or two. Correct that oversight, but fence
    management should be improved before a new set of registers is added.
    
    Bugzilla: https://bugs.freedesktop.org/show_bug?id=30199
    Original patch by: Yuanhan Liu <yuanhan.liu@intel.com>
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
    Cc: stable@kernel.org


hardware is:

00:00.0 Host bridge: Intel Corporation Mobile 945GME Express Memory Controller Hub (rev 03)
        Subsystem: Giga-byte Technology Device 1999
        Flags: bus master, fast devsel, latency 0
        Capabilities: [e0] Vendor Specific Information: Len=09 <?>
        Kernel driver in use: agpgart-intel

00:02.0 VGA compatible controller: Intel Corporation Mobile 945GME Express Integrated Graphics Controller (rev 03) (prog-if 00 [VGA controller])
        Subsystem: Giga-byte Technology Device 1999
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Memory at f2200000 (32-bit, non-prefetchable) [size=512K]
        I/O ports at 18d0 [size=8]
        Memory at d0000000 (32-bit, prefetchable) [size=256M]
        Memory at f2300000 (32-bit, non-prefetchable) [size=256K]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-                                                                                          
        Capabilities: [d0] Power Management version 2                                                                                                       
        Kernel driver in use: i915                                                                                                                          
                                                                                                                                                            
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)                              
        Subsystem: Giga-byte Technology Device 1999                                                                                                         
        Flags: bus master, fast devsel, latency 0
        Memory at f2280000 (32-bit, non-prefetchable) [disabled] [size=512K]
        Capabilities: [d0] Power Management version 2

If more infos are needed, please tell me.

The errors always happend with an external display connected. I've booted the
system, logged in and changed the resolution to maximum of the external
display. Shortly after this the error happend.

regards,
  Johannes

Re: 2.6.36-rc5 i915 regression

[Chris Wilson]

On Fri, 1 Oct 2010 13:00:05 +0200, Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> wrote:
> With 2.6.36-rc5 and later my netbook is unusable. After login on X (KDE) the
> screen gets totally garbled, under X and console too. The log shows me this
> messages:

My humble apologies, fixed in 2.6.36-rc6:

commit 9b74f7348f214b1f99819f0d0da4a1cbabb1e740
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Sep 22 19:10:44 2010 +0100

    drm/i915: Fix 945GM regression in e259befd
    
    A minor typo caused a single fence register to be incorrectly
    programmed, resulting in occassional tiling corruption.
    
    Reported-and-tested-by: Hans de Bruin <bruinjm@xs4all.nl>
    Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=18962
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
    Cc: stable@kernel.org

It appears to have bitten worse than just the occasional gfx corruption.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre

Re: 2.6.36-rc5 i915 regression

[Seblu]

Chris Wilson <chris <at> chris-wilson.co.uk> writes:

> 
> On Fri, 1 Oct 2010 13:00:05 +0200, Johannes Hirte <johannes.hirte <at> fem.tu-
ilmenau.de> wrote:
> > With 2.6.36-rc5 and later my netbook is unusable. After login on X (KDE) the
> > screen gets totally garbled, under X and console too. The log shows me this
> > messages:
> 
> My humble apologies, fixed in 2.6.36-rc6:
> 

I've the same kind trouble with -rc6 and my dell e6410. When module i915 is 
loaded screen become black and i loose the hand on the system.

I don't have log message probably because my i915 is loaded in initrd and
kernel should crash before it's write something. 
If you need more investigation, i can provide it.

Regards,

-- 
Sebastien Luttringer

Re: 2.6.36-rc5 i915 regression

[Chris Wilson]

On Fri, 1 Oct 2010 12:55:56 +0000 (UTC), Seblu <seblu@seblu.net> wrote:
> I've the same kind trouble with -rc6 and my dell e6410. When module i915 is 
> loaded screen become black and i loose the hand on the system.

Nope, completely different bug. eDP being the issue here. Though I think
the Dell 6410 is one of the few that Jesse has been able to get working
(in drm-intel--next)
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre

Re: 2.6.36-rc5 i915 regression

[Seblu]

On Fri, Oct 1, 2010 at 3:22 PM, Chris Wilson <chris@chris-wilson.co.uk> wrote:
> On Fri, 1 Oct 2010 12:55:56 +0000 (UTC), Seblu <seblu@seblu.net> wrote:
>> I've the same kind trouble with -rc6 and my dell e6410. When module i915 is
>> loaded screen become black and i loose the hand on the system.
>
> Nope, completely different bug. eDP being the issue here. Though I think
> the Dell 6410 is one of the few that Jesse has been able to get working
> (in drm-intel--next)

You speek about eDP, but i don't use the external DisplayPort. Despite
that you think, this can be linked?

I have to add, that with 2.6.33 to 2.6.35.7 host start and drm/intel
works well ! I was so happy :)

If you need i report something i can do it, but at the moment,
starting with 2.6.36-rc6 produce no usable output for debug or
understanding what goes wrong.

Regards,


-- 
Sébastien Luttringer
www.seblu.net

Re: 2.6.36-rc5 i915 regression

[Zhenyu Wang]

[-- Attachment #1.1: Type: text/plain, Size: 1478 bytes --]

On 2010.10.01 22:27:45 +0200, Seblu wrote:
> On Fri, Oct 1, 2010 at 3:22 PM, Chris Wilson <chris@chris-wilson.co.uk> wrote:
> > On Fri, 1 Oct 2010 12:55:56 +0000 (UTC), Seblu <seblu@seblu.net> wrote:
> >> I've the same kind trouble with -rc6 and my dell e6410. When module i915 is
> >> loaded screen become black and i loose the hand on the system.
> >
> > Nope, completely different bug. eDP being the issue here. Though I think
> > the Dell 6410 is one of the few that Jesse has been able to get working
> > (in drm-intel--next)
> 
> You speek about eDP, but i don't use the external DisplayPort. Despite
> that you think, this can be linked?

eDP is embedded DP link to your laptop panel, it's an alternative replacement
for LVDS.

> 
> I have to add, that with 2.6.33 to 2.6.35.7 host start and drm/intel
> works well ! I was so happy :)

yeah, that time I did borrow one e6410 and it's working. Then it left
me and I got regression report on eDP from PCH DP port.

> 
> If you need i report something i can do it, but at the moment,
> starting with 2.6.36-rc6 produce no usable output for debug or
> understanding what goes wrong.
> 

I sent mail before to ask if ajax's eDP connector type change for PCH/eDP
has caused regression for that, but one e6410 owner replied no effect by
revert that patch. You may help by bisect drm/i915.

-- 
Open Source Technology Center, Intel ltd.

$gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827

[-- Attachment #1.2: Digital signature --]
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Re: 2.6.36-rc5 i915 regression

[Seblu]

On Sat, Oct 2, 2010 at 11:07 AM, Zhenyu Wang <zhenyuw@linux.intel.com> wrote:
> On 2010.10.01 22:27:45 +0200, Seblu wrote:
>> On Fri, Oct 1, 2010 at 3:22 PM, Chris Wilson <chris@chris-wilson.co.uk> wrote:
>> > On Fri, 1 Oct 2010 12:55:56 +0000 (UTC), Seblu <seblu@seblu.net> wrote:
>> >> I've the same kind trouble with -rc6 and my dell e6410. When module i915 is
>> >> loaded screen become black and i loose the hand on the system.
>> >
>> > Nope, completely different bug. eDP being the issue here. Though I think
>> > the Dell 6410 is one of the few that Jesse has been able to get working
>> > (in drm-intel--next)
>>
>> You speek about eDP, but i don't use the external DisplayPort. Despite
>> that you think, this can be linked?
>
> eDP is embedded DP link to your laptop panel, it's an alternative replacement
> for LVDS.
thx


>
> I sent mail before to ask if ajax's eDP connector type change for PCH/eDP
> has caused regression for that, but one e6410 owner replied no effect by
> revert that patch. You may help by bisect drm/i915.
Ok i can try (first time). To understand correclty what you want, i
have to download linux 2.6.36-rc6 git, bisect, compile an run kernel
until i found the commit cause the issue?

I will test new rc7 in near time to show if my display come back.

-- 
Sébastien Luttringer
www.seblu.net

Re: 2.6.36-rc5 i915 regression

[Seblu]

On Fri, Oct 8, 2010 at 1:24 AM, Seblu <seblu@seblu.net> wrote:
> On Sat, Oct 2, 2010 at 11:07 AM, Zhenyu Wang <zhenyuw@linux.intel.com> wrote:
>> On 2010.10.01 22:27:45 +0200, Seblu wrote:
>>> On Fri, Oct 1, 2010 at 3:22 PM, Chris Wilson <chris@chris-wilson.co.uk> wrote:
>>> > On Fri, 1 Oct 2010 12:55:56 +0000 (UTC), Seblu <seblu@seblu.net> wrote:
>> I sent mail before to ask if ajax's eDP connector type change for PCH/eDP
>> has caused regression for that, but one e6410 owner replied no effect by
>> revert that patch. You may help by bisect drm/i915.
> Ok i can try (first time). To understand correclty what you want, i
> have to download linux 2.6.36-rc6 git, bisect, compile an run kernel
> until i found the commit cause the issue?
>
> I will test new rc7 in near time to show if my display come back.
>
Nothing better with rc7, il will start bisecting this weekend.


-- 
Sébastien Luttringer
www.seblu.net

Re: 2.6.36-rc5 i915 regression

[Seblu]

On Sat, Oct 9, 2010 at 11:40 AM, Seblu <seblu@seblu.net> wrote:
> On Fri, Oct 8, 2010 at 1:24 AM, Seblu <seblu@seblu.net> wrote:
>> On Sat, Oct 2, 2010 at 11:07 AM, Zhenyu Wang <zhenyuw@linux.intel.com> wrote:
>>> On 2010.10.01 22:27:45 +0200, Seblu wrote:
>>>> On Fri, Oct 1, 2010 at 3:22 PM, Chris Wilson <chris@chris-wilson.co.uk> wrote:
>>>> > On Fri, 1 Oct 2010 12:55:56 +0000 (UTC), Seblu <seblu@seblu.net> wrote:
>>> I sent mail before to ask if ajax's eDP connector type change for PCH/eDP
>>> has caused regression for that, but one e6410 owner replied no effect by
>>> revert that patch. You may help by bisect drm/i915.
>> Ok i can try (first time). To understand correclty what you want, i
>> have to download linux 2.6.36-rc6 git, bisect, compile an run kernel
>> until i found the commit cause the issue?
>>
>> I will test new rc7 in near time to show if my display come back.
>>
> Nothing better with rc7, il will start bisecting this weekend.
>
Bug is introduced between 2.6.36-rc1 and 2.6.36-rc2. I have bisected
(all the night)  to find the following introducting commit

913d8d110078788c14812dce8bb62c37946821d2 is the first bad commit
commit 913d8d110078788c14812dce8bb62c37946821d2
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Sat Aug 7 11:01:35 2010 +0100

    drm/i915: Ensure that while(INREG()) are bounded (v2)

    Add a new macro, wait_for, to simplify the act of waiting on a register
    to change state. wait_for() takes three arguments, the condition to
    inspect on every loop, the maximum amount of time to wait and whether to
    yield the cpu for a length of time after each check.

    v2: Upgrade failure messages to DRM_ERROR on the suggestion of
    Eric Anholt. We do not expect to hit these conditions as they reflect
    programming errors, so if we do we want to be notified.

    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
    Signed-off-by: Eric Anholt <eric@anholt.net>

:040000 040000 6002481a823acda95b2d1891c81d83cb8702af54
dc78f280e056469f9e46f02feae4607a4bbd5023 M      drivers

Regards,

-- 
Sébastien Luttringer
www.seblu.net

Re: Fwd: 2.6.36-rc5 i915 regression

[Seblu]

On Tue, Oct 12, 2010 at 1:56 PM, Chris Wilson <chris@chris-wilson.co.uk> wrote:
> On Tue, 12 Oct 2010 12:44:18 +0200, Seblu <seblu@seblu.net> wrote:
> That bisection result is very bizarre. In a midst of a major timing mishap
> in rc2, that commit is comparatively calm and at least prints out an error
> message should you ever hit it. (But since you weren't reporting a hang
> just a blank screen, I doubt you are.)
You are right, screen is just stay black. I can reboot my computer by
Ctrl-Alt-Del. But something is weird, after a led blink screen stay
black and need a power button push to stop computer (and an another to
restart it with a functionnal bios screen)

> The Dell e6410 has an embedded DisplayPort device which has patches aiming
> for 2.6.37 but since we are still in the process of getting eDP solid,
> I wouldn't suggest any but the worst offenders for stable. (The current
> state of affairs still seems to be fix some machines and break others, but
> many more machines do now seem to be working than before.)
>
> git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git
> drm-intel-next has many more eDP patches, and Jesse is currently cooking
> up some more in
> git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/drm-intel.git
> edp-fixes.
> -Chris

I've tried linux-next git patches and with this, display goes back to
normal and it's seems that compositing under kde 4.5 is now a little
bit fluent.

This is sad you cannot push fix in 2.6.36 because e6410 dell laptop
become completly unusable. Life is harsh.

I've one more question about i915. Do you know that i915 module and
recent version of Xorg have bad performance in a kde 4.5 compositing
environment? Do you think this is linked with eDP issues ?

Regards,

-- 
Sébastien Luttringer
www.seblu.net

Re: Fwd: 2.6.36-rc5 i915 regression

[Seblu]

On Tue, Oct 12, 2010 at 1:56 PM, Chris Wilson <chris@chris-wilson.co.uk> wrote:
> On Tue, 12 Oct 2010 12:44:18 +0200, Seblu <seblu@seblu.net> wrote:
>> Hi Chris,
>>
>> Did you receive my previous mail about 2.6.36-rc2 issue, do you thinks
>> this can be fix before 2.6.36 release ?
>> Do you need more investigation / test from me ?
>
> That bisection result is very bizarre. In a midst of a major timing mishap
> in rc2, that commit is comparatively calm and at least prints out an error
> message should you ever hit it. (But since you weren't reporting a hang
> just a blank screen, I doubt you are.)
>
> The Dell e6410 has an embedded DisplayPort device which has patches aiming
> for 2.6.37 but since we are still in the process of getting eDP solid,
> I wouldn't suggest any but the worst offenders for stable. (The current
> state of affairs still seems to be fix some machines and break others, but
> many more machines do now seem to be working than before.)
>
> git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git
> drm-intel-next has many more eDP patches, and Jesse is currently cooking
> up some more in
> git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/drm-intel.git
> edp-fixes.

Hello Chris,

i've tryed last git kernel with edp-fixes from
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/drm-intel.git,
i've the following result :
http://videobin.org/+2a3/2kn.ogg

with intel-drm-next from
git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git,
it's better!
My screen is back. Do you include those patch in 2.6.37?

But:
- suspend to RAM cause a computer freeze.
- after one day, applications become graphically slow.

Regards,

-- 
Sébastien Luttringer
www.seblu.net

Re: Fwd: 2.6.36-rc5 i915 regression

[Peter Clifton]

On Tue, 2010-10-26 at 01:19 +0200, Seblu wrote:

> i've tryed last git kernel with edp-fixes from
> git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/drm-intel.git,
> i've the following result :
> http://videobin.org/+2a3/2kn.ogg

For future reference.. its probably not a good idea to let that
condition persist. There is a chance it might damage the LCD if it is
powered but not being driven properly.

> with intel-drm-next from
> git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git,
> it's better!
> My screen is back. Do you include those patch in 2.6.37?
> 
> But:
> - suspend to RAM cause a computer freeze.

Do you have this commit from drm-next recently?:

commit 641934069d29211baf82afb93622a426172b67b6
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Sun Oct 24 12:38:05 2010 +0100

    drm/i915: Move gpu_write_list to per-ring
    
    ... to prevent flush processing of an idle (or even absent) ring.
    
    This fixes a regression during suspend from 87acb0a5.
    
    Reported-and-tested-by: Alexey Fisher <bug-track@fisher-privat.net>
    Tested-by: Peter Clifton <pcjc2@cam.ac.uk>
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>


It fixed my suspend.

> - after one day, applications become graphically slow.

No clue there I'm afraid.

-- 
Peter Clifton

Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,
Cambridge
CB3 0FA

Tel: +44 (0)7729 980173 - (No signal in the lab!)
Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me)

Re: Fwd: 2.6.36-rc5 i915 regression

[Seblu]

On Tue, Oct 26, 2010 at 1:47 AM, Peter Clifton <pcjc2@cam.ac.uk> wrote:
> For future reference.. its probably not a good idea to let that
> condition persist. There is a chance it might damage the LCD if it is
> powered but not being driven properly.
ok

> Do you have this commit from drm-next recently?:
>
> commit 641934069d29211baf82afb93622a426172b67b6
> Author: Chris Wilson <chris@chris-wilson.co.uk>
> Date:   Sun Oct 24 12:38:05 2010 +0100
>
yes i've it, i merged linux upstream with drm-intel-next two hours ago.

I make an another video, which show suspend to ram issue with this
lastest kernel and how it's perfectly functionnal with 2.6.35.7.

http://videobin.org/+2a5/2kp.ogg

can i do something more to help your  troubleshoot this issue?

-- 
Sébastien Luttringer
www.seblu.net

Re: Fwd: 2.6.36-rc5 i915 regression

[Peter Clifton]

On Tue, 2010-10-26 at 02:57 +0200, Seblu wrote:
> I make an another video, which show suspend to ram issue with this
> lastest kernel and how it's perfectly functionnal with 2.6.35.7.
> 
> http://videobin.org/+2a5/2kp.ogg
> 
> can i do something more to help your  troubleshoot this issue?

If you have a working kernel version and a non working version (and some
time on your hands!), you could "git bisect" between the various
revisions to determine which commit introduced the breakage.

(NB: I'm not a driver developer here, just a keen user).

It took me a good long time bisecting a graphics regression when I had
it down to 80 changes. Since in that case I was sure it was a graphics
related fault - and had an idea which of the many driver source files
would be relevant, I was able to pass some extra parameters to git
bisect to narrow the search.

Others might disagree, but from your video I wouldn't be 100% sure that
I could restrict the search to the graphics driver only.

-- 
Peter Clifton

Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,
Cambridge
CB3 0FA

Tel: +44 (0)7729 980173 - (No signal in the lab!)
Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me)

Re: Fwd: 2.6.36-rc5 i915 regression

[Seblu]

On Tue, Oct 26, 2010 at 3:42 AM, Peter Clifton <pcjc2@cam.ac.uk> wrote:
> On Tue, 2010-10-26 at 02:57 +0200, Seblu wrote:
>> I make an another video, which show suspend to ram issue with this
>> lastest kernel and how it's perfectly functionnal with 2.6.35.7.
>>
>> http://videobin.org/+2a5/2kp.ogg
>>
>> can i do something more to help your  troubleshoot this issue?
>
> If you have a working kernel version and a non working version (and some
> time on your hands!), you could "git bisect" between the various
> revisions to determine which commit introduced the breakage.
Yeah. i already done that. Issue comme from a comiit between
2.6.36-rc1 and 2.6.36-rc2.
I found the following commit : 913d8d110078788c14812dce8bb62c37946821d2

But Chris answer was a bit disappointing for me and i'm not sure that
help someone to fix issue on e6410 laptops.

> (NB: I'm not a driver developer here, just a keen user).
me too :)

>
> Others might disagree, but from your video I wouldn't be 100% sure that
> I could restrict the search to the graphics driver only.
oh?

i'm going to sleep.

Bye

-- 
Sébastien Luttringer
www.seblu.net

Re: Fwd: 2.6.36-rc5 i915 regression

[Chris Wilson]

On Tue, 26 Oct 2010 01:19:50 +0200, Seblu <seblu@seblu.net> wrote:
> Hello Chris,
> 
> i've tryed last git kernel with edp-fixes from
> git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/drm-intel.git,
> i've the following result :
> http://videobin.org/+2a3/2kn.ogg
> 
> with intel-drm-next from
> git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git,
> it's better!
> My screen is back. Do you include those patch in 2.6.37?

Yes, -next is intended to be the basis of what is upstreamed for 2.6.37.
 
> But:
> - suspend to RAM cause a computer freeze.

Depending on where the tip was, at least one suspend regression was
recently fixed. It would be useful to recheck with 64193406.

> - after one day, applications become graphically slow.

You're not alone. Eric has reported that writes to a GTT mapping become
glacially slow after some time, without any distortion in the CPU profile.
Can we collate what hardware we are seeing this effect on?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre

Re: Fwd: 2.6.36-rc5 i915 regression

[Seblu]

[-- Attachment #1: Type: text/plain, Size: 1419 bytes --]

On Tue, Oct 26, 2010 at 10:30 AM, Chris Wilson <chris@chris-wilson.co.uk> wrote:
> On Tue, 26 Oct 2010 01:19:50 +0200, Seblu <seblu@seblu.net> wrote:
>> Hello Chris,
>>
>> i've tryed last git kernel with edp-fixes from
>> git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/drm-intel.git,
>> i've the following result :
>> http://videobin.org/+2a3/2kn.ogg
>>
>> with intel-drm-next from
>> git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git,
>> it's better!
>> My screen is back. Do you include those patch in 2.6.37?
>
> Yes, -next is intended to be the basis of what is upstreamed for 2.6.37.
>
>> But:
>> - suspend to RAM cause a computer freeze.
>
> Depending on where the tip was, at least one suspend regression was
> recently fixed. It would be useful to recheck with 64193406.
Yes i have this patch in, and the issue is still here.

Do you have seen this vmideo, which show the suspend to ram issue with
ailine and drm-next and how it's functional with 2.6.35.7?

http://videobin.org/+2a5/2kp.ogg

>
>> - after one day, applications become graphically slow.
>
> You're not alone. Eric has reported that writes to a GTT mapping become
> glacially slow after some time, without any distortion in the CPU profile.
> Can we collate what hardware we are seeing this effect on?
lspci,lshw,cpuinfo, you did somthing more?

-- 
Sébastien Luttringer
www.seblu.net

[-- Attachment #2: lshw --]
[-- Type: application/octet-stream, Size: 18814 bytes --]

rwolf
    description: Laptop
    product: Latitude E6410 ()
    vendor: Winbond Electronics
    version: 0001
    serial: 7BTRTM1
    width: 64 bits
    capabilities: smbios-2.6 dmi-2.6 vsyscall64 vsyscall32
    configuration: boot=normal chassis=laptop uuid=44454C4C-4200-1054-8052-B7C04F544D31
  *-core
       description: Motherboard
       product: 0667CC
       vendor: Winbond Electronics
       physical id: 0
       version: A00
       serial: /7BTRTM1/CN1296107I0301/
     *-firmware
          description: BIOS
          vendor: Winbond Electronics
          physical id: 0
          version: A05
          date: 08/10/2010
          size: 64KiB
          capacity: 960KiB
          capabilities: pci upgrade shadowing escd cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer int10video acpi usb ls120boot zipboot biosbootspecification
     *-cpu
          description: CPU
          product: Intel(R) Core(TM) i7 CPU       M 620  @ 2.67GHz
          vendor: Intel Corp.
          physical id: 4
          bus info: cpu@0
          version: Intel(R) Core(TM) i7 CPU       M 620  @ 2.67GH
          serial: To Be Filled By O.E.M.
          slot: CPU 1
          size: 2666MHz
          capacity: 4GHz
          width: 64 bits
          clock: 533MHz
          capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt aes lahf_lm ida arat tpr_shadow vnmi flexpriority ept vpid
          configuration: cores=2 enabledcores=1 threads=2
        *-cache:0
             description: L1 cache
             physical id: 5
             slot: L1-Cache
             size: 32KiB
             capacity: 32KiB
             capabilities: internal write-back unified
        *-cache:1
             description: L2 cache
             physical id: 6
             slot: L2-Cache
             size: 512KiB
             capacity: 512KiB
             capabilities: internal varies unified
        *-cache:2
             description: L3 cache
             physical id: 7
             slot: L3-Cache
             size: 4MiB
             capacity: 4MiB
             capabilities: internal varies unified
     *-memory
          description: System Memory
          physical id: 19
          slot: System board or motherboard
          size: 8GiB
        *-bank:0
             description: SODIMM DDR3 Synchronous 1067 MHz (0,9 ns)
             product: M471B5273CH0-CH9
             vendor: Samsung
             physical id: 0
             serial: 473CE4E8
             slot: DIMM_A
             size: 4GiB
             width: 64 bits
             clock: 1067MHz (0.9ns)
        *-bank:1
             description: SODIMM DDR3 Synchronous 1067 MHz (0,9 ns)
             product: M471B5273CH0-CH9
             vendor: Samsung
             physical id: 1
             serial: 473CE44B
             slot: DIMM_B
             size: 4GiB
             width: 64 bits
             clock: 1067MHz (0.9ns)
     *-pci:0
          description: Host bridge
          product: Core Processor DRAM Controller
          vendor: Intel Corporation
          physical id: 100
          bus info: pci@0000:00:00.0
          version: 02
          width: 32 bits
          clock: 33MHz
          configuration: driver=agpgart-intel
          resources: irq:0
        *-display
             description: VGA compatible controller
             product: Core Processor Integrated Graphics Controller
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             version: 02
             width: 64 bits
             clock: 33MHz
             capabilities: msi pm vga_controller bus_master cap_list rom
             configuration: driver=i915 latency=0
             resources: irq:45 memory:f0000000-f03fffff memory:e0000000-efffffff ioport:70b0(size=8)
        *-communication:0 UNCLAIMED
             description: Communication controller
             product: 5 Series/3400 Series Chipset HECI Controller
             vendor: Intel Corporation
             physical id: 16
             bus info: pci@0000:00:16.0
             version: 06
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: latency=0
             resources: memory:f69b0000-f69b000f
        *-communication:1
             description: Serial controller
             product: 5 Series/3400 Series Chipset KT Controller
             vendor: Intel Corporation
             physical id: 16.3
             bus info: pci@0000:00:16.3
             version: 06
             width: 32 bits
             clock: 66MHz
             capabilities: pm msi 16550 bus_master cap_list
             configuration: driver=serial latency=0
             resources: irq:19 ioport:70a0(size=8) memory:f6990000-f6990fff
        *-network
             description: Ethernet interface
             product: 82577LM Gigabit Network Connection
             vendor: Intel Corporation
             physical id: 19
             bus info: pci@0000:00:19.0
             logical name: eth0
             version: 05
             serial: 00:26:b9:ee:33:05
             size: 1Gbit/s
             capacity: 1Gbit/s
             width: 32 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
             configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=1.0.2-k4 duplex=full firmware=0.12-1 ip=192.168.242.2 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
             resources: irq:44 memory:f6900000-f691ffff memory:f6980000-f6980fff ioport:7040(size=32)
        *-usb:0
             description: USB Controller
             product: 5 Series/3400 Series Chipset USB2 Enhanced Host Controller
             vendor: Intel Corporation
             physical id: 1a
             bus info: pci@0000:00:1a.0
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: pm debug ehci bus_master cap_list
             configuration: driver=ehci_hcd latency=0
             resources: irq:16 memory:f6970000-f69703ff
        *-multimedia
             description: Audio device
             product: 5 Series/3400 Series Chipset High Definition Audio
             vendor: Intel Corporation
             physical id: 1b
             bus info: pci@0000:00:1b.0
             version: 05
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi pciexpress bus_master cap_list
             configuration: driver=HDA Intel latency=0
             resources: irq:47 memory:f6960000-f6963fff
        *-pci:0
             description: PCI bridge
             product: 5 Series/3400 Series Chipset PCI Express Root Port 1
             vendor: Intel Corporation
             physical id: 1c
             bus info: pci@0000:00:1c.0
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:40 ioport:6000(size=4096) memory:f5500000-f68fffff ioport:f6a00000(size=2097152)
        *-pci:1
             description: PCI bridge
             product: 5 Series/3400 Series Chipset PCI Express Root Port 2
             vendor: Intel Corporation
             physical id: 1c.1
             bus info: pci@0000:00:1c.1
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:41 ioport:5000(size=4096) memory:f4100000-f54fffff ioport:f6c00000(size=2097152)
           *-network DISABLED
                description: Wireless interface
                product: Centrino Advanced-N 6200
                vendor: Intel Corporation
                physical id: 0
                bus info: pci@0000:02:00.0
                logical name: wlan0
                version: 35
                serial: 00:23:14:d2:92:24
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
                configuration: broadcast=yes driver=iwlagn driverversion=2.6.35.7-seblu firmware=9.193.4.1 build 19710 latency=0 link=yes multicast=yes wireless=IEEE 802.11abg
                resources: irq:48 memory:f4100000-f4101fff
        *-pci:2
             description: PCI bridge
             product: 5 Series/3400 Series Chipset PCI Express Root Port 3
             vendor: Intel Corporation
             physical id: 1c.2
             bus info: pci@0000:00:1c.2
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:42 ioport:2000(size=8192) memory:f0400000-f2cfffff ioport:f6e00000(size=2097152)
           *-generic
                description: SD Host controller
                product: Ricoh Co Ltd
                vendor: Ricoh Co Ltd
                physical id: 0
                bus info: pci@0000:03:00.0
                version: 03
                width: 32 bits
                clock: 33MHz
                capabilities: msi pm pciexpress bus_master cap_list
                configuration: driver=sdhci-pci latency=0
                resources: irq:19 memory:f2c40000-f2c400ff
           *-firewire
                description: FireWire (IEEE 1394)
                product: Ricoh Co Ltd
                vendor: Ricoh Co Ltd
                physical id: 0.4
                bus info: pci@0000:03:00.4
                version: 03
                width: 32 bits
                clock: 33MHz
                capabilities: msi pm pciexpress ohci bus_master cap_list
                configuration: driver=firewire_ohci latency=0
                resources: irq:16 memory:f2c00000-f2c007ff
        *-pci:3
             description: PCI bridge
             product: 5 Series/3400 Series Chipset PCI Express Root Port 4
             vendor: Intel Corporation
             physical id: 1c.3
             bus info: pci@0000:00:1c.3
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:43 ioport:4000(size=4096) memory:f2d00000-f40fffff ioport:f7000000(size=2097152)
        *-usb:1
             description: USB Controller
             product: 5 Series/3400 Series Chipset USB2 Enhanced Host Controller
             vendor: Intel Corporation
             physical id: 1d
             bus info: pci@0000:00:1d.0
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: pm debug ehci bus_master cap_list
             configuration: driver=ehci_hcd latency=0
             resources: irq:17 memory:f6950000-f69503ff
        *-pci:4
             description: PCI bridge
             product: 82801 Mobile PCI Bridge
             vendor: Intel Corporation
             physical id: 1e
             bus info: pci@0000:00:1e.0
             version: a5
             width: 32 bits
             clock: 33MHz
             capabilities: pci subtractive_decode bus_master cap_list
        *-isa
             description: ISA bridge
             product: Mobile 5 Series Chipset LPC Interface Controller
             vendor: Intel Corporation
             physical id: 1f
             bus info: pci@0000:00:1f.0
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: isa bus_master cap_list
             configuration: latency=0
        *-storage
             description: SATA controller
             product: 5 Series/3400 Series Chipset 6 port SATA AHCI Controller
             vendor: Intel Corporation
             physical id: 1f.2
             bus info: pci@0000:00:1f.2
             logical name: scsi0
             logical name: scsi1
             version: 05
             width: 32 bits
             clock: 66MHz
             capabilities: storage msi pm ahci_1.0 bus_master cap_list emulated
             configuration: driver=ahci latency=0
             resources: irq:46 ioport:7090(size=8) ioport:7080(size=4) ioport:7070(size=8) ioport:7060(size=4) ioport:7020(size=32) memory:f6940000-f69407ff
           *-disk
                description: ATA Disk
                product: SAMSUNG SSD PM80
                physical id: 0
                bus info: scsi@0:0.0.0
                logical name: /dev/sda
                version: VBM2
                serial: S0GUNEAZ604596
                size: 238GiB (256GB)
                capabilities: gpt-1.00 partitioned partitioned:gpt
                configuration: ansiversion=5 guid=1182bb4d-7f81-0b7e-8ae5-e785027d210c
              *-volume:0
                   description: EFI partition
                   physical id: 1
                   bus info: scsi@0:0.0.0,1
                   logical name: /dev/sda1
                   serial: 5ffe09c8-2abf-0cc0-e29f-5e82f91a3a24
                   capacity: 511KiB
                   configuration: name=BIOS boot partition
              *-volume:1
                   description: EXT4 volume
                   vendor: Linux
                   physical id: 2
                   bus info: scsi@0:0.0.0,2
                   logical name: /dev/sda2
                   logical name: /
                   version: 1.0
                   serial: 6c9f6561-fb6b-4fc3-be98-20e71215ea8e
                   size: 230GiB
                   capabilities: journaled extended_attributes large_files huge_files dir_nlink extents ext4 ext2 initialized
                   configuration: created=2010-08-27 02:08:15 filesystem=ext4 label=rootfs lastmountpoint=/ modified=2010-10-26 02:20:49 mount.fstype=ext4 mount.options=rw,noatime,nodiratime,barrier=1,data=ordered,discard mounted=2010-10-26 04:21:42 name=Linux/Windows data state=mounted
              *-volume:2
                   description: Linux swap volume
                   physical id: 3
                   bus info: scsi@0:0.0.0,3
                   logical name: /dev/sda3
                   version: 1
                   serial: ee01c539-afbd-4234-afc2-aa054e5a19b2
                   size: 8194MiB
                   capacity: 8194MiB
                   capabilities: nofs swap initialized
                   configuration: filesystem=swap name=Linux swap pagesize=4096
           *-cdrom
                description: DVD-RAM writer
                product: DVD+-RW GU10N
                vendor: HL-DT-ST
                physical id: 1
                bus info: scsi@1:0.0.0
                logical name: /dev/cdrom
                logical name: /dev/cdrom0
                logical name: /dev/cdrw
                logical name: /dev/cdrw0
                logical name: /dev/dvd
                logical name: /dev/dvd0
                logical name: /dev/dvdrw
                logical name: /dev/dvdrw0
                logical name: /dev/scd0
                logical name: /dev/sr0
                version: A102
                capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
                configuration: ansiversion=5 status=nodisc
        *-serial UNCLAIMED
             description: SMBus
             product: 5 Series/3400 Series Chipset SMBus Controller
             vendor: Intel Corporation
             physical id: 1f.3
             bus info: pci@0000:00:1f.3
             version: 05
             width: 64 bits
             clock: 33MHz
             configuration: latency=0
             resources: memory:f6930000-f69300ff ioport:7000(size=32)
        *-generic UNCLAIMED
             description: Signal processing controller
             product: 5 Series/3400 Series Chipset Thermal Subsystem
             vendor: Intel Corporation
             physical id: 1f.6
             bus info: pci@0000:00:1f.6
             version: 05
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: latency=0
             resources: memory:f6920000-f6920fff
     *-pci:1
          description: Host bridge
          product: Core Processor QuickPath Architecture Generic Non-core Registers
          vendor: Intel Corporation
          physical id: 101
          bus info: pci@0000:3f:00.0
          version: 02
          width: 32 bits
          clock: 33MHz
     *-pci:2
          description: Host bridge
          product: Core Processor QuickPath Architecture System Address Decoder
          vendor: Intel Corporation
          physical id: 102
          bus info: pci@0000:3f:00.1
          version: 02
          width: 32 bits
          clock: 33MHz
     *-pci:3
          description: Host bridge
          product: Core Processor QPI Link 0
          vendor: Intel Corporation
          physical id: 103
          bus info: pci@0000:3f:02.0
          version: 02
          width: 32 bits
          clock: 33MHz
     *-pci:4
          description: Host bridge
          product: Core Processor QPI Physical 0
          vendor: Intel Corporation
          physical id: 104
          bus info: pci@0000:3f:02.1
          version: 02
          width: 32 bits
          clock: 33MHz
     *-pci:5
          description: Host bridge
          product: Core Processor Reserved
          vendor: Intel Corporation
          physical id: 105
          bus info: pci@0000:3f:02.2
          version: 02
          width: 32 bits
          clock: 33MHz
     *-pci:6
          description: Host bridge
          product: Core Processor Reserved
          vendor: Intel Corporation
          physical id: 106
          bus info: pci@0000:3f:02.3
          version: 02
          width: 32 bits
          clock: 33MHz
  *-battery
       product: DELL WG35104
       vendor: Sanyo
       physical id: 1
       version: 4/10/2010
       serial: 0255
       slot: Sys. Battery Bay
       capacity: 84000mWh
       configuration: voltage=11,1V
  *-power UNCLAIMED
       description: To Be Filled By O.E.M.
       product: To Be Filled By O.E.M.
       vendor: To Be Filled By O.E.M.
       physical id: 2
       version: To Be Filled By O.E.M.
       serial: To Be Filled By O.E.M.
       capacity: 32768mWh

[-- Attachment #3: lspci --]
[-- Type: application/octet-stream, Size: 2401 bytes --]

00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02)
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)
00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
00:16.3 Serial controller: Intel Corporation 5 Series/3400 Series Chipset KT Controller (rev 06)
00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit Network Connection (rev 05)
00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05)
00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05)
00:1c.2 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 3 (rev 05)
00:1c.3 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 (rev 05)
00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5)
00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05)
00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05)
02:00.0 Network controller: Intel Corporation Centrino Advanced-N 6200 (rev 35)
03:00.0 SD Host controller: Ricoh Co Ltd Device e822 (rev 03)
03:00.4 FireWire (IEEE 1394): Ricoh Co Ltd Device e832 (rev 03)
3f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
3f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
3f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
3f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
3f:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
3f:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)

[-- Attachment #4: Type: text/plain, Size: 159 bytes --]

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Re: Fwd: 2.6.36-rc5 i915 regression

[Chris Wilson]

On Tue, 26 Oct 2010 10:49:01 +0200, Seblu <seblu@seblu.net> wrote:
> On Tue, Oct 26, 2010 at 10:30 AM, Chris Wilson <chris@chris-wilson.co.uk> wrote:
> > Depending on where the tip was, at least one suspend regression was
> > recently fixed. It would be useful to recheck with 64193406.
> Yes i have this patch in, and the issue is still here.

Oh 6410. Yeah, that regression was pre-g4x. Do you have a good idea of the
precise range in which the regression was introduced, or is just another
eDP misery?
 
> Do you have seen this vmideo, which show the suspend to ram issue with
> ailine and drm-next and how it's functional with 2.6.35.7?
> 
> http://videobin.org/+2a5/2kp.ogg
> 
> >
> >> - after one day, applications become graphically slow.
> >
> > You're not alone. Eric has reported that writes to a GTT mapping become
> > glacially slow after some time, without any distortion in the CPU profile.
> > Can we collate what hardware we are seeing this effect on?
> lspci,lshw,cpuinfo, you did somthing more?

Just the chipset [Arrandale, in this case] for the time being, so I know
which machines to leave running to see if I can observe the effect here.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre

Re: Fwd: 2.6.36-rc5 i915 regression

[Seblu]

This seems to be fixed in 2.6.37-rc1 and lastest git tree. :)

Thanks guys!

On Tue, Oct 26, 2010 at 10:49 AM, Seblu <seblu@seblu.net> wrote:
> On Tue, Oct 26, 2010 at 10:30 AM, Chris Wilson <chris@chris-wilson.co.uk> wrote:
>> On Tue, 26 Oct 2010 01:19:50 +0200, Seblu <seblu@seblu.net> wrote:
>>> Hello Chris,
>>>
>>> i've tryed last git kernel with edp-fixes from
>>> git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/drm-intel.git,
>>> i've the following result :
>>> http://videobin.org/+2a3/2kn.ogg
>>>
>>> with intel-drm-next from
>>> git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git,
>>> it's better!
>>> My screen is back. Do you include those patch in 2.6.37?
>>
>> Yes, -next is intended to be the basis of what is upstreamed for 2.6.37.
>>
>>> But:
>>> - suspend to RAM cause a computer freeze.
>>
>> Depending on where the tip was, at least one suspend regression was
>> recently fixed. It would be useful to recheck with 64193406.
> Yes i have this patch in, and the issue is still here.
>
> Do you have seen this vmideo, which show the suspend to ram issue with
> ailine and drm-next and how it's functional with 2.6.35.7?
>
> http://videobin.org/+2a5/2kp.ogg
>
>>
>>> - after one day, applications become graphically slow.
>>
>> You're not alone. Eric has reported that writes to a GTT mapping become
>> glacially slow after some time, without any distortion in the CPU profile.
>> Can we collate what hardware we are seeing this effect on?
> lspci,lshw,cpuinfo, you did somthing more?
>
> --
> Sébastien Luttringer
> www.seblu.net
>



-- 
Sébastien Luttringer
www.seblu.net

Re: Fwd: 2.6.36-rc5 i915 regression

[Chun-Yu Shei]

On 10/26/10 04:30, Chris Wilson wrote:
> On Tue, 26 Oct 2010 01:19:50 +0200, Seblu <seblu@seblu.net> wrote:
>> - after one day, applications become graphically slow.
> 
> You're not alone. Eric has reported that writes to a GTT mapping become
> glacially slow after some time, without any distortion in the CPU profile.
> Can we collate what hardware we are seeing this effect on?

Would a dramatic slowdown in flash video framerates be a symptom of
this?  If so, I'm also experiencing this after 1-2 days on an Arrandale.

Chun-Yu