Comment 78 for bug 475429

(In reply to comment #13)

There were 2 problem, I think.

 (1) screen lock at any time.
 (2) screen lock when 3D use (blender, compiz, ...).

Both of them show the similar dmesg error (lock time over 120s).
But, (1) is unlocked by mouse move or keyboard interrupt.
And, (1) might be fixed by 2.6.35-rc4.

> Or it's a missed interrupt ;-)

I'll bet below :-)

1. mutex locked
2. missed interrupt -> not unlocked.
3. DRM_IOCTL_I915_GEM_PREAD wait the lock.
4. dmesg shows error ( 120s after freeze ).