[PATCH 0/1] [Intrepid SRU] LP#276943 -- fix resume for intel GM965/GM45

Tim Gardner tcanonical at tpi.com
Mon Dec 22 14:35:18 UTC 2008

Andy Whitcroft wrote:
> Systems with Intel graphics, specifically those with GM965/GM45 arrays,
> suffer from resume hangs.  These systems reliably lock up with a black
> screen, showing a cursor and often the background of the unlock window.
> Reume is always unsuccessful.  This seems to be caused by a lack of state save over suspend/resume for these chipsets.
> Following this email is a patch for this issue.  This saves this additional
> GPU state during suspend.  This is a GPU specific modification only
> triggering where the hardware is detected.  Two community testers, plus
> myself, report this as fixing their resume problems.
> Proposing this for SRU to Intrepid.
> -apw
> Andy Whitcroft (1):
>   i915: Save/restore MCHBAR_RENDER_STANDBY on GM965/GM45
>  drivers/gpu/drm/i915/i915_drv.c |    9 +++++++++
>  drivers/gpu/drm/i915/i915_drv.h |    4 ++++
>  2 files changed, 13 insertions(+), 0 deletions(-)

ACK - I'm surprised that this didn't come via stable at kernel.org. Please
make sure they are aware of this patch. It appears to fulfill all of the
requirements for a stable update.

Tim Gardner tim.gardner at canonical.com

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