Comment #16 fixes it on my Dell E5420. The funny thing is, that normally the error message appears randomly, but when I insert my Nokia CS-17 3G-modem, the error always appeared three times in a row: [ 3678.937434] usb 2-1.2: new high speed USB device using ehci_hcd and address 9 [ 3679.050002] cdc_acm 2-1.2:1.1: ttyACM0: USB ACM device [ 3679.051045] cdc_acm 2-1.2:1.3: ttyACM1: USB ACM device [ 3698.657860] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 1395816, at 1395816], missed IRQ? [ 3703.191041] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 1398151, at 1398151], missed IRQ? [ 3704.728817] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 1398192, at 1398192], missed IRQ? [ 3718.388454] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 1403486, at 1403486], missed IRQ?
I don't know how a device in USB port generates error messages related to a video driver, but it is. -- 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 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs