http://bugzilla.opensuse.org/show_bug.cgi?id=907039 Bug ID: 907039 Summary: i915 drm driver complains: *ERROR* pipe A/B underrun Classification: openSUSE Product: openSUSE Distribution Version: 13.2 Hardware: i686 OS: openSUSE 13.2 Status: NEW Severity: Minor Priority: P5 - None Component: Kernel Assignee: kernel-maintainers@forge.provo.novell.com Reporter: jdelvare@suse.com QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- I see pipe underrun messages on my old Panasonic Toughbook CF-18 laptop after updating to openSUSE 13.2. Before that it was running openSUSE 11.4, and I never saw these error messages. The graphics chip in my laptop is: 00:02.0 VGA compatible controller [0300]: Intel Corporation 82852/855GM Integrated Graphics Device [8086:3582] (rev 02) 00:02.1 Display controller [0380]: Intel Corporation 82852/855GM Integrated Graphics Device [8086:3582] (rev 02) No errors nor warnings visible in Xorg.0.log. Relevant kernel log messages: [ 5.462859] [drm] Initialized drm 1.1.0 20060810 [ 5.516140] [drm] Memory usable by graphics device = 128M [ 5.516146] [drm] Replacing VGA console driver [ 5.516158] fb: switching to inteldrmfb from EFI VGA [ 5.521916] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 5.521924] [drm] Driver supports precise vblank timestamp query. [ 5.580087] [drm] GMBUS [i915 gmbus panel] timed out, falling back to bit banging on pin 3 [ 5.599601] [drm:i9xx_set_fifo_underrun_reporting] *ERROR* pipe A underrun [ 5.619742] [drm] initialized overlay support [ 5.698544] [drm:i9xx_set_fifo_underrun_reporting] *ERROR* pipe A underrun [ 5.780209] fbcon: inteldrmfb (fb0) is primary device [ 6.592586] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device [ 6.592616] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0 [ 6.642304] [drm:i9xx_check_fifo_underruns] *ERROR* pipe B underrun [ 6.725855] [drm:i9xx_set_fifo_underrun_reporting] *ERROR* pipe A underrun [ 47.458008] [drm:i9xx_set_fifo_underrun_reporting] *ERROR* pipe A underrun [ 47.736185] [drm:i9xx_set_fifo_underrun_reporting] *ERROR* pipe A underrun [ 48.686871] [drm:i9xx_set_fifo_underrun_reporting] *ERROR* pipe A underrun [ 75.032451] [drm:i9xx_set_fifo_underrun_reporting] *ERROR* pipe A underrun [ 75.428211] [drm:i9xx_set_fifo_underrun_reporting] *ERROR* pipe A underrun [ 1402.930605] [drm:i8xx_irq_handler] *ERROR* pipe B underrun [ 5332.865613] [drm:i8xx_irq_handler] *ERROR* pipe B underrun [ 6240.731628] [drm:i8xx_irq_handler] *ERROR* pipe B underrun -- You are receiving this mail because: You are on the CC list for the bug.