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["Luigi R." <761065@xxxxxxxxxxxxxxxxxx>]

Same error with HP DV6 6030el i72630 and AMD Radeon HD 6470M. I can not
use radeon driver because Natty freeze during the boot so I have to use
i915. But sometimes and randomly I receive freeze also with this driver.
Keyboard and mouse are locked, alt+stamp REISUB doesn't work. Looking
the kernel log some minute before the freeze I can find this error
[drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed. Now I'm
using the solution in #18 and seems to work fine. I can understand why
this bug is classified "medium" .....freezes like these impose forced
shutdowns with high risks of damage to the hardware. I was near to use
again windows just only to safeguard my purchase. Please fix it!!!
Thanks

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https://bugs.launchpad.net/bugs/761065

Title:
  [Sandybridge] Spurious "*ERROR* Hangcheck timer elapsed... blt ring
  idle" messages in dmesg when using compiz

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