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Created attachment 502581 [details] Serial console trace Description of problem: Semi-random kernel crash when using GUI applications. Version-Release number of selected component (if applicable): Fedora 15 w/ Linux version 2.6.38.6-27.fc15.i686 (mockbuild.fedoraproject.org) (gcc version 4.6.0 20110428 (Red Hat 4.6.0-6) (GCC) ) #1 SMP Sun May 15 17:57:13 UTC 2011 How reproducible: Sometimes this happens when logging in, other times I can log in but it happens while running Firefox or evince. Steps to Reproduce: 1. Use GUI applications. 2. Keep using them until the kernel crashes. Actual results: kernel BUG at drivers/gpu/drm/drm_irq.c:933! Expected results: No kernel BUG Additional info: See the attached boot.log Perhaps related to i915 driver
I also have this problem, need to set "Forced Fallback Mode" to ON.
Well setting "Forced Fallback Mode" to ON does seem to stop the BUG, but that is not really a very good solution. The kernel should not crash. Period. Kernel 2.6.38.7-30.fc15.i686 still crashes FWIW.
void drm_vblank_put(struct drm_device *dev, int crtc) { BUG_ON(atomic_read(&dev->vblank_refcount[crtc]) == 0);
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