thinkpad x200 X.server not work with gm4500 graphics

thinkpad x200 X.server not work with gm4500 graphics

[arrow.ebd]

deal,

    My thinkpad x200's X.server can not startup on the kernel 2.6.28,
and dmesg will show as below:
    -->>--
    [drm] Initialized drm 1.1.0 20060810
    pci 0000:00:02.0: power state changed by ACPI to D0
    pci 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
    pci 0000:00:02.0: setting latency timer to 64
    [drm] Initialized i915 1.6.0 20060119 on minor 0
    pci 0000:00:02.0: pg_start == 0x00001f7f, intel_private.gtt_entries == 0x00001fff
    pci 0000:00:02.0: trying to insert into local/stolen memory
    --<<--

    Then, I change file "drivers/char/agp/intel-agp.c" as this:
    -->>--
    --diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
    index 9cf6e9b..e681f75 100644
    --- a/drivers/char/agp/intel-agp.c
    +++ b/drivers/char/agp/intel-agp.c
    @@ -528,7 +528,8 @@ static void intel_i830_init_gtt_entries(void)
                     * stolen, ignore it in stolen gtt entries counting.  However,
                     * 4KB of the stolen memory doesn't get mapped to the GTT.
                     */
    -               size = 4;
    +               /* size = 4; */
    +               size = 516;
            } else {
                    /* On previous hardware, the GTT size was just what was
                     * required to map the aperture.
    --<<--

    And Xorg can start now.
(1) Is it correct ?
    Because older kernel use size as "512 + 4" at here, but now use "size = 4".
(2) How to deal with it if the patch is not right ?
(3) How to get more specification about gm4500 ?

Re: thinkpad x200 X.server not work with gm4500 graphics

[Andrew Morton]

On Mon, 10 Nov 2008 23:25:18 +0800 arrow.ebd@gmail.com wrote:

> deal,
> 
>     My thinkpad x200's X.server can not startup on the kernel 2.6.28,

Were any earlier kernels OK?  If so, which version(s)?

Thanks.

> and dmesg will show as below:
>     -->>--
>     [drm] Initialized drm 1.1.0 20060810
>     pci 0000:00:02.0: power state changed by ACPI to D0
>     pci 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
>     pci 0000:00:02.0: setting latency timer to 64
>     [drm] Initialized i915 1.6.0 20060119 on minor 0
>     pci 0000:00:02.0: pg_start == 0x00001f7f, intel_private.gtt_entries == 0x00001fff
>     pci 0000:00:02.0: trying to insert into local/stolen memory
>     --<<--
> 
>     Then, I change file "drivers/char/agp/intel-agp.c" as this:
>     -->>--
>     --diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
>     index 9cf6e9b..e681f75 100644
>     --- a/drivers/char/agp/intel-agp.c
>     +++ b/drivers/char/agp/intel-agp.c
>     @@ -528,7 +528,8 @@ static void intel_i830_init_gtt_entries(void)
>                      * stolen, ignore it in stolen gtt entries counting.  However,
>                      * 4KB of the stolen memory doesn't get mapped to the GTT.
>                      */
>     -               size = 4;
>     +               /* size = 4; */
>     +               size = 516;
>             } else {
>                     /* On previous hardware, the GTT size was just what was
>                      * required to map the aperture.
>     --<<--
> 
>     And Xorg can start now.
> (1) Is it correct ?
>     Because older kernel use size as "512 + 4" at here, but now use "size = 4".
> (2) How to deal with it if the patch is not right ?
> (3) How to get more specification about gm4500 ?

Re: thinkpad x200 X.server not work with gm4500 graphics

[Dave Airlie]

On Tue, 11 Nov 2008, Andrew Morton wrote:

> On Mon, 10 Nov 2008 23:25:18 +0800 arrow.ebd@gmail.com wrote:
> 
> > deal,
> > 
> >     My thinkpad x200's X.server can not startup on the kernel 2.6.28,
> 
> Were any earlier kernels OK?  If so, which version(s)?

What userspace Intel X driver is in use? afaik the GM45 wasn't supported 
until after we fixed this issue. Hacking around the size in the kernel 
won't actually fix the problem it actually makes a lot of things a lot 
worse.

Dave.

 > > Thanks.
> 
> > and dmesg will show as below:
> >     -->>--
> >     [drm] Initialized drm 1.1.0 20060810
> >     pci 0000:00:02.0: power state changed by ACPI to D0
> >     pci 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
> >     pci 0000:00:02.0: setting latency timer to 64
> >     [drm] Initialized i915 1.6.0 20060119 on minor 0
> >     pci 0000:00:02.0: pg_start == 0x00001f7f, intel_private.gtt_entries == 0x00001fff
> >     pci 0000:00:02.0: trying to insert into local/stolen memory
> >     --<<--
> > 
> >     Then, I change file "drivers/char/agp/intel-agp.c" as this:
> >     -->>--
> >     --diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
> >     index 9cf6e9b..e681f75 100644
> >     --- a/drivers/char/agp/intel-agp.c
> >     +++ b/drivers/char/agp/intel-agp.c
> >     @@ -528,7 +528,8 @@ static void intel_i830_init_gtt_entries(void)
> >                      * stolen, ignore it in stolen gtt entries counting.  However,
> >                      * 4KB of the stolen memory doesn't get mapped to the GTT.
> >                      */
> >     -               size = 4;
> >     +               /* size = 4; */
> >     +               size = 516;
> >             } else {
> >                     /* On previous hardware, the GTT size was just what was
> >                      * required to map the aperture.
> >     --<<--
> > 
> >     And Xorg can start now.
> > (1) Is it correct ?
> >     Because older kernel use size as "512 + 4" at here, but now use "size = 4".
> > (2) How to deal with it if the patch is not right ?
> > (3) How to get more specification about gm4500 ?
> 
> 

Re: thinkpad x200 X.server not work with gm4500 graphics

[arrow.ebd]

On Tue, Nov 11, 2008 at 08:50:39AM +0000, Dave Airlie wrote:
> On Tue, 11 Nov 2008, Andrew Morton wrote:
> 
> > On Mon, 10 Nov 2008 23:25:18 +0800 arrow.ebd@gmail.com wrote:
> > 
> > > deal,
> > > 
> > >     My thinkpad x200's X.server can not startup on the kernel 2.6.28,
> > 
> > Were any earlier kernels OK?  If so, which version(s)?
> What userspace Intel X driver is in use? afaik the GM45 wasn't supported 
> until after we fixed this issue. Hacking around the size in the kernel 
> won't actually fix the problem it actually makes a lot of things a lot 
> worse.

My video-driver is "xf86-video-intel 2.3.2",
and "X.Org X Server 1.4.2", my distribution is Archlinux.
The patch's size is calculated with the dmesg from kernel-2.6.27.
My lap-top computer work now, but I'm not sure that, So is there any
specification about it or any suggestion, I'm glad to do some test on
it.

> > 
> > > and dmesg will show as below:
> > >     -->>--
> > >     [drm] Initialized drm 1.1.0 20060810
> > >     pci 0000:00:02.0: power state changed by ACPI to D0
> > >     pci 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
> > >     pci 0000:00:02.0: setting latency timer to 64
> > >     [drm] Initialized i915 1.6.0 20060119 on minor 0
> > >     pci 0000:00:02.0: pg_start == 0x00001f7f, intel_private.gtt_entries == 0x00001fff
> > >     pci 0000:00:02.0: trying to insert into local/stolen memory
> > >     --<<--
> > > 
> > >     Then, I change file "drivers/char/agp/intel-agp.c" as this:
> > >     -->>--
> > >     --diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
> > >     index 9cf6e9b..e681f75 100644
> > >     --- a/drivers/char/agp/intel-agp.c
> > >     +++ b/drivers/char/agp/intel-agp.c
> > >     @@ -528,7 +528,8 @@ static void intel_i830_init_gtt_entries(void)
> > >                      * stolen, ignore it in stolen gtt entries counting.  However,
> > >                      * 4KB of the stolen memory doesn't get mapped to the GTT.
> > >                      */
> > >     -               size = 4;
> > >     +               /* size = 4; */
> > >     +               size = 516;
> > >             } else {
> > >                     /* On previous hardware, the GTT size was just what was
> > >                      * required to map the aperture.
> > >     --<<--
> > > 
> > >     And Xorg can start now.
> > > (1) Is it correct ?
> > >     Because older kernel use size as "512 + 4" at here, but now use "size = 4".
> > > (2) How to deal with it if the patch is not right ?
> > > (3) How to get more specification about gm4500 ?
> > 
> > 

Re: thinkpad x200 X.server not work with gm4500 graphics

[arrow.ebd]

On Tue, Nov 11, 2008 at 12:46:43AM -0800, Andrew Morton wrote:
> On Mon, 10 Nov 2008 23:25:18 +0800 arrow.ebd@gmail.com wrote:
> >     My thinkpad x200's X.server can not startup on the kernel 2.6.28,
> 
> Were any earlier kernels OK?  If so, which version(s)?
v2.6.27 work fine while v2.6.27-rc[1,2,3,4] do not work.