https://bugs.freedesktop.org/show_bug.cgi?id=29738
--- Comment #21 from Daniel Vetter daniel@ffwll.ch 2010-09-14 09:26:09 PDT --- Tomasz, can you please confirm that you're indeed still hitting this bug by checking the that the comit that introduced the problem (709ea97145c125b3811ff70429e90ebdb0e832e5) does not work, but its immediate parent (7a6b2896f261894dde287d3faefa4b432cddca53) does work. If that's not the case, your hitting a different problem, please then create a new bug to avoid confusion.
Also please add your dmesg (after having crashed X).