Bug#635953: GM965 display broken when using kino

[Julien Cristau <jcristau@debian.org>]

On Fri, Jul 29, 2011 at 21:37:55 +0200, Jonathan Nieder wrote:

> Ben Hutchings wrote:
> 
> > Just a few minutes ago it seems to have triggered some more serious
> > error which left the screen blank.  The kernel logged the warnings
> > shown below.
> [...]
> > [ 1439.876084] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
> > [ 1439.940384] [drm] Changing LVDS panel from (+hsync, +vsync) to (-hsync, -vsync)
> > [ 1439.940537] ------------[ cut here ]------------
> > [ 1439.940562] WARNING: at /build/buildd-linux-2.6_3.0.0-1-i386-ML66CU/linux-2.6-3.0.0/debian/build/source_i386_none/drivers/gpu/drm/i915/intel_display.c:791 intel_enable_pipe+0x68/0x11f [i915]()
> > [ 1439.940566] Hardware name: 7661CH8
> > [ 1439.940568] PLL state assertion failure (expected on, current off)
> 
> Sounds roughly like <https://bugs.freedesktop.org/show_bug.cgi?id=39176>.
> For that bug, Chris Wilson writes:
> 
> | I wonder if this is related to the plane-flushing fix:
> |
> | commit 2704cf5fbd248871a745d210733c6319959d2b0c
> | Author: Jesse Barnes <jbarnes@virtuousgeek.org>
> | Date:   Thu Jul 28 11:52:45 2011 -0700
> |
> |     drm/i915: flush plane control changes on ILK+ as well
> [...]
> | Can you please test keithp/drm-intel-fixes [
> | git://git.kernel.org/pub/scm/linux/kernel/git/keithp/drm-intel.git]
> 
> Maybe that can help.
> 
The commit message says that fix is for gen5+.  Ben is on gen4.

Cheers,
Julien