PROBLEM: i915 modesetting - weird offset graphics (v2.6.37-rc1-27-gff8b16d)

PROBLEM: i915 modesetting - weird offset graphics (v2.6.37-rc1-27-gff8b16d)

[Jon Masters]

Folks,

I upgraded the userspace on my EeePC 1015PEM netbook to the latest
Fedora (F15) rawhide and booted a custom kernel in order to test both
the RC1 and also see if the now in-staging brcm80211 behaves better (it
doesn't, it still can't survive suspend at all, separate issue though).

The xrandr output is identical in both case, showing a mode of 1024x600
being the one that X is currently using. Booting with i915 modesetting
disabled does avoid the weird offset but of course X doesn't start. I
can bisect this if there isn't already some suggestions from the
audience, in particular is to what debug information you need.

Kernel: v2.6.37-rc1-27-gff8b16d

Photos:
	http://www.flickr.com/photos/jonmasters/5145351220/
	http://www.flickr.com/photos/jonmasters/5144748543/

Said system will likely be at plumbers in the am...

Jon.

Re: PROBLEM: i915 modesetting - weird offset graphics (v2.6.37-rc1-27-gff8b16d)

[Jon Masters]

On Thu, 2010-11-04 at 03:25 -0400, Jon Masters wrote:

> I upgraded the userspace on my EeePC 1015PEM netbook to the latest
> Fedora (F15) rawhide and booted a custom kernel in order to test both
> the RC1 and also see if the now in-staging brcm80211 behaves better (it
> doesn't, it still can't survive suspend at all, separate issue though).
> 
> The xrandr output is identical in both case, showing a mode of 1024x600
> being the one that X is currently using. Booting with i915 modesetting
> disabled does avoid the weird offset but of course X doesn't start. I
> can bisect this if there isn't already some suggestions from the
> audience, in particular is to what debug information you need.
> 
> Kernel: v2.6.37-rc1-27-gff8b16d
> 
> Photos:
> 	http://www.flickr.com/photos/jonmasters/5145351220/
> 	http://www.flickr.com/photos/jonmasters/5144748543/

Video:
	http://www.youtube.com/watch?v=43jc9_7n3kU

I'll bring it in to Plumbers in a few hours.

Jon.

Re: PROBLEM: i915 modesetting - weird offset graphics (v2.6.37-rc1-27-gff8b16d)

[Jon Masters]

On Thu, 2010-11-04 at 03:29 -0400, Jon Masters wrote:
> On Thu, 2010-11-04 at 03:25 -0400, Jon Masters wrote:
> 
> > I upgraded the userspace on my EeePC 1015PEM netbook to the latest
> > Fedora (F15) rawhide and booted a custom kernel in order to test both
> > the RC1 and also see if the now in-staging brcm80211 behaves better (it
> > doesn't, it still can't survive suspend at all, separate issue though).
> > 
> > The xrandr output is identical in both case, showing a mode of 1024x600
> > being the one that X is currently using. Booting with i915 modesetting
> > disabled does avoid the weird offset but of course X doesn't start. I
> > can bisect this if there isn't already some suggestions from the
> > audience, in particular is to what debug information you need.
> > 
> > Kernel: v2.6.37-rc1-27-gff8b16d
> > 
> > Photos:
> > 	http://www.flickr.com/photos/jonmasters/5145351220/
> > 	http://www.flickr.com/photos/jonmasters/5144748543/
> 
> Video:
> 	http://www.youtube.com/watch?v=43jc9_7n3kU
> 
> I'll bring it in to Plumbers in a few hours.

I took it to Plumbers and pinged a few people in person, but nobody was
all that interested. I am bisecting this at the moment, a few builds in.

Jon.

Re: PROBLEM: i915 modesetting - weird offset graphics (v2.6.37-rc1-27-gff8b16d)

[Jon Masters]

On Thu, 2010-11-04 at 03:25 -0400, Jon Masters wrote:

> I upgraded the userspace on my EeePC 1015PEM netbook to the latest
> Fedora (F15) rawhide and booted a custom kernel in order to test both
> the RC1 and also see if the now in-staging brcm80211 behaves better (it
> doesn't, it still can't survive suspend at all, separate issue though).
> 
> The xrandr output is identical in both case, showing a mode of 1024x600
> being the one that X is currently using. Booting with i915 modesetting
> disabled does avoid the weird offset but of course X doesn't start. I
> can bisect this if there isn't already some suggestions from the
> audience, in particular is to what debug information you need.

Also, the intel-gfx list is moderated with auto-rejection. Do I really
need to subscribe to the list just to get a mail through?

Jon.

Re: PROBLEM: i915 modesetting - weird offset graphics (v2.6.37-rc1-27-gff8b16d)

[Chris Wilson]

On Thu, 04 Nov 2010 09:37:01 -0400, Jon Masters <jonathan@jonmasters.org> wrote:
> Also, the intel-gfx list is moderated with auto-rejection. Do I really
> need to subscribe to the list just to get a mail through?

A few of the Intel gfx engineers are at Plumbers. If you tell Jesse about
it, he may be able to convince the powers-that-be to change the policy.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre

Re: PROBLEM: i915 modesetting - weird offset graphics (v2.6.37-rc1-27-gff8b16d)

[Jon Masters]

On Thu, 2010-11-04 at 13:41 +0000, Chris Wilson wrote:
> On Thu, 04 Nov 2010 09:37:01 -0400, Jon Masters <jonathan@jonmasters.org> wrote:
> > Also, the intel-gfx list is moderated with auto-rejection. Do I really
> > need to subscribe to the list just to get a mail through?
> 
> A few of the Intel gfx engineers are at Plumbers. If you tell Jesse about
> it, he may be able to convince the powers-that-be to change the policy.

I didn't see this mail in time. I did show a few folks the corruption,
ran the kernel with drm.debug=4, etc. and checked the modelines. xrandr
and the kernel seem to report the same modes each time, but obviously
the display is shifted. I see various changes in git (everything from
EDID reading to actual modeline changes in the i915 code - various weird
margin settings seem to exist that might well cause some offset in the
display) that could be responsible, so I will bisect it now for you.

My concern with the email list is that it's listed in the MAINTAINERS
file, but it's essentially of no value to bug reports unless they are
already subscribed to it (moderation is fine, even auto reject after 3
days - a standard mm feature, but I feel auto-reject is a little too
harsh). Needless to say, I'm subscribed now :)

Thanks,

Jon.

Re: PROBLEM: i915 modesetting - weird offset graphics (v2.6.37-rc1-27-gff8b16d)

[Jon Masters]

On Thu, 2010-11-04 at 18:14 -0400, Jon Masters wrote:
> On Thu, 2010-11-04 at 13:41 +0000, Chris Wilson wrote:
> > On Thu, 04 Nov 2010 09:37:01 -0400, Jon Masters <jonathan@jonmasters.org> wrote:
> > > Also, the intel-gfx list is moderated with auto-rejection. Do I really
> > > need to subscribe to the list just to get a mail through?
> > 
> > A few of the Intel gfx engineers are at Plumbers. If you tell Jesse about
> > it, he may be able to convince the powers-that-be to change the policy.
> 
> I didn't see this mail in time. I did show a few folks the corruption,
> ran the kernel with drm.debug=4, etc. and checked the modelines. xrandr
> and the kernel seem to report the same modes each time, but obviously
> the display is shifted. I see various changes in git (everything from
> EDID reading to actual modeline changes in the i915 code - various weird
> margin settings seem to exist that might well cause some offset in the
> display) that could be responsible, so I will bisect it now for you.

Bisection is running. Should post something over the weekend.

Jon.

Re: PROBLEM: i915 modesetting - weird offset graphics (v2.6.37-rc1-27-gff8b16d)

[Alan W. Irwin]

On 2010-11-04 13:41-0000 Chris Wilson wrote:

> On Thu, 04 Nov 2010 09:37:01 -0400, Jon Masters <jonathan@jonmasters.org> wrote:
>> Also, the intel-gfx list is moderated with auto-rejection. Do I really
>> need to subscribe to the list just to get a mail through?
>
> A few of the Intel gfx engineers are at Plumbers. If you tell Jesse about
> it, he may be able to convince the powers-that-be to change the policy.
> -Chris

I think the present list policy of posting only allowed for
subscriber's only is a good one.  My experience with some mailing
lists for particular SourceForge projects that I admin is if you allow
unsubscribed users to post, then lots of spam tends to gets posted
despite every effort by SourceForge to filter out spam.  Just out of
curiosity I have forwarded failing spam attempts for all SourceForge
mailing lists I admin to my own personal e-mail account to track what
is going on.  Most lists I admin have no spam attacks on them, but the
most active of them (plplot-devel) has thousands of thwarted attempts
to spam to it over say the last year.  So it appears the spammers keep
track of which mailing lists are active and don't waste their time on
relatively inactive lists.

However, it should be pointed out that this list is more active than
plplot-devel so I assume the spamming would start quite quickly if the
present list policy were changed.  Or this list may already be under
lots of spam attacks which are thwarted by the present policy.

Such spam shouldn't matter that much to list subscribers if they have
good spam filters (like I do with spam_bayes), but spamming does tend
to fill up your mailing-list archive with a load of crap which makes
it more difficult to browse or search that archive.

In sum, spammers appear to be generally lazy so that the small barrier
to entry of demanding all posts be from the poster's subscription
address continues to be an amazingly good tactic against spam in my
experience.

Alan
__________________________
Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the FreeEOS equation-of-state implementation
for stellar interiors (freeeos.sf.net); PLplot scientific plotting software
package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of
Linux Links project (loll.sf.net); and the Linux Brochure Project
(lbproject.sf.net).
__________________________

Linux-powered Science
__________________________

Re: PROBLEM: i915 modesetting - weird offset graphics (v2.6.37-rc1-27-gff8b16d)

[Maciej Rutecki]

On czwartek, 4 listopada 2010 o 08:25:58 Jon Masters wrote:
> Folks,
> 
> I upgraded the userspace on my EeePC 1015PEM netbook to the latest
> Fedora (F15) rawhide and booted a custom kernel in order to test both
> the RC1 and also see if the now in-staging brcm80211 behaves better (it
> doesn't, it still can't survive suspend at all, separate issue though).
> 
> The xrandr output is identical in both case, showing a mode of 1024x600
> being the one that X is currently using. Booting with i915 modesetting
> disabled does avoid the weird offset but of course X doesn't start. I
> can bisect this if there isn't already some suggestions from the
> audience, in particular is to what debug information you need.
> 
> Kernel: v2.6.37-rc1-27-gff8b16d
> 
> Photos:
> 	http://www.flickr.com/photos/jonmasters/5145351220/
> 	http://www.flickr.com/photos/jonmasters/5144748543/
> 
> Said system will likely be at plumbers in the am...
> 
I created a Bugzilla entry at 
https://bugzilla.kernel.org/show_bug.cgi?id=22712
for your bug report, please add your address to the CC list in there, thanks!

-- 
Maciej Rutecki
http://www.maciek.unixy.pl

Re: PROBLEM: i915 modesetting - weird offset graphics (v2.6.37-rc1-27-gff8b16d)

[Jon Masters]

On Thu, 2010-11-11 at 09:02 +0100, Maciej Rutecki wrote:
> On czwartek, 4 listopada 2010 o 08:25:58 Jon Masters wrote:
> > Folks,
> > 
> > I upgraded the userspace on my EeePC 1015PEM netbook to the latest
> > Fedora (F15) rawhide and booted a custom kernel in order to test both
> > the RC1 and also see if the now in-staging brcm80211 behaves better (it
> > doesn't, it still can't survive suspend at all, separate issue though).
> > 
> > The xrandr output is identical in both case, showing a mode of 1024x600
> > being the one that X is currently using. Booting with i915 modesetting
> > disabled does avoid the weird offset but of course X doesn't start. I
> > can bisect this if there isn't already some suggestions from the
> > audience, in particular is to what debug information you need.
> > 
> > Kernel: v2.6.37-rc1-27-gff8b16d
> > 
> > Photos:
> > 	http://www.flickr.com/photos/jonmasters/5145351220/
> > 	http://www.flickr.com/photos/jonmasters/5144748543/
> > 
> > Said system will likely be at plumbers in the am...
> > 
> I created a Bugzilla entry at 
> https://bugzilla.kernel.org/show_bug.cgi?id=22712
> for your bug report, please add your address to the CC list in there, thanks!

Thanks. I requested the k.o BZ to send me a new password over the
weekend, which was delayed by a few hours and then I didn't get around
to this. FWIW, the bug has a fix on the intel-gfx list.

Jon.