I see the strange "bsd ring behavior" when using the fix of #18 with my Thinkpad X220. Added the semaphore option to grub renders my system unusable. Console is no longer high-res and I only see graphics errors with X, no chance to work. I get the following error:
[drm:init_ring_common] *ERROR* gen6 bsd ring initialization failed ctl 0001f003 head 00000000 tail 00000000 start 00022000 [drm:i915_driver_load] *ERROR* failed to init modeset If I boot the system w/o the grub parameter and set it afterwards (via /sys), it seems to work. So take care if you put the fix into the grub config. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/761065 Title: [Sandybridge] Spurious "*ERROR* Hangcheck timer elapsed... blt ring idle" messages in dmesg when using compiz To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/761065/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
