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

Andy Whitcroft apw at canonical.com
Mon Dec 22 08:30:48 UTC 2008

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.


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(-)

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