Bug 25553

I tried on Asus eeepc 1000H and Samsung N130, both of them have the same frozen issue. I will try on Aspire One.

Test on acer aspire one still fails with this patch, 

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 099f420..03c897c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2577,7 +2577,9 @@ static void i9xx_update_wm(struct drm_device *dev, int planea_clock,
                srwm = total_size - sr_entries;
                if (srwm < 0)
                        srwm = 1;
-               I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN | (srwm & 0x3f));
+               //I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN | (srwm & 0x3f));
+               I915_WRITE(FW_BLC_SELF, ((1 << 31) | (1 << 16) | (1 << 15) | (srwm & 0xff)));
+               POSTING_READ(FW_BLC_SELF);
        }

        DRM_DEBUG("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",


I got below dmesg.

[   15.698063] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[   15.698087] render error detected, EIR: 0x00000000
[   15.698100] i915: Waking up sleeping processes
[   15.698150] [drm:i915_wait_request] *ERROR* i915_wait_request returns -5 (awaiting 1443 at 1435)
[   15.698468] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.698933] reboot required
[   15.699360] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.699545] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.700120] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.700642] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.703888] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.704880] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.705598] render error detected, EIR: 0x00000010
[   15.705608] page table error
[   15.705614]   PGTBL_ER: 0x00000002
[   15.705623] [drm:i915_handle_error] *ERROR* EIR stuck: 0x00000010, masking
[   15.705647] render error detected, EIR: 0x00000010
[   15.705653] page table error
[   15.705658]   PGTBL_ER: 0x00000002
[   15.705730] reboot required
[   15.766980] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.767214] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.767272] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.767304] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.767347] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.767388] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.772580] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.772735] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.773062] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.773156] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
[   15.778592] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged

Jesse, I retest your patch on latest 2.6.33-rc3, still met same problem.

We should probably go ahead with your patch; I replied to Eric that it's ok to apply it, you should ping him again.

You fixed this one, thanks:

commit 72ddbd39f39b3cc5f1f661f97e67f2a497c4d57a
Author: Li Peng <peng.li@linux.intel.com>
Date:   Tue Jan 19 21:32:57 2010 +0800