Bug#601732: xserver-xorg-video-intel: render error upon S3 wakeup

[Sanjoy Mahajan <sanjoy@olin.edu>]

I don't think the fix in <https://bugzilla.kernel.org/show_bug.cgi?id=15544>
solved the problem for me.  That fix was in 2.6.35-rc2, but the problem
happened for me even with the 2.6.36 kernel.  

However, the good news is that the error is now gone; or rather the
error shows up but is cleared so the system doesn't hang.  I don't know
exactly which kernel solved the problem.  I think it was 2.6.38.  What I
noticed different in the dmesg log is that, ever since I stopped
experiencing hangs, the following line showed up implying that the error
is being cleared automatically:

[1099952.207172] [drm:i915_report_and_clear_eir] *ERROR* EIR stuck: 0x00000010, masking

Here's a few more lines of context from the current dmesg output (Debian
2.6.39 kernel):

[830137.389798] [drm:intel_opregion_setup], graphic opregion physical addr: 0x0
[830137.389804] [drm:intel_opregion_setup], ACPI OpRegion not supported!
[830137.390304] render error detected, EIR: 0x00000010
[830137.390308] page table error
[830137.390311]   PGTBL_ER: 0x00000001
[830137.390316] [drm:i915_report_and_clear_eir] *ERROR* EIR stuck: 0x00000010, masking
[830137.390328] render error detected, EIR: 0x00000010
[830137.390331] page table error
[830137.390335]   PGTBL_ER: 0x00000001
[830137.390407] [drm:drm_crtc_helper_set_mode], [CRTC:4]
[830137.390415] [drm:intel_sdvo_debug_write], SDVOB: W: 05 00 00                   (SDVO_CMD_SET_ACTIVE_OUTPUTS)

-- 
-Sanjoy

`Until lions have their historians, tales of the hunt shall always
 glorify the hunters.'  --African Proverb