Hi, With Linux-3.2-rc6 I'm frequently seeing GPU hangs when large amounts of text scroll in an xterm, such as when extracting a tar archive. Such as this one (note the timestamps): [22865.157750] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung [22865.157763] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ring [22871.165992] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung [22871.166008] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ring [22877.417902] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung [22877.417915] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ring [22883.426132] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung [22883.426146] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ring These hangs did not occur with Linux 3.1 or they were so infrequent that I didn't notice them. The machine is an x220 laptop with SNB CPU. The kernel command line contains: i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1 Note that VT-d is enabled in the BIOS, but the kernel is compiled without IOMMU support. Because the IOMMU is not enabled, I'm inclined to think that this problem is not VT-d related. Cheers, - Udo
Attachment:
signature.asc
Description: PGP signature
_______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
