Error message from kernel: intel_set_cpu_fifo_underrun_reporting [i915]], ERROR uncleared fifo underrun. What does it mean, what to do?
Since a few days, must be in conjunction with new kernel 4.5.5, my Fedora 23 Workstation output some weird error message that I don't understand. Is this something to worry? Should I file a bug against kernel?
kernel: [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe A
kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
kernel: [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A
kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
kernel: [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe B
kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
kernel: [drm:intel_check_pch_fifo_underruns [i915]] *ERROR* pch fifo underrun on pch transcoder B
kernel: [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe A
kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
kernel: [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A
kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
kernel: [drm:intel_check_cpu_fifo_underruns [i915]] *ERROR* fifo underrun on pipe B
kernel: [drm:intel_check_pch_fifo_underruns [i915]] *ERROR* pch fifo underrun on pch transcoder B
@florian It's reporter, add you to cc an provide all information you can related to it bugzilla.redhat an now I realice that maybe your kernel-regression-test doesn't end sucessfull, comment it too, regards
@hhlp. Thanks for your message. I searched bugzilla but couldn't find the error. Thanks for spotting it and linking it here.
Yea, was also thinking if kernel-test may be related. Will see...
I am also wondering if the following systemd messages are related to it, and if I should worry about it. http://pastebin.com/PdQkwWtW
Lines of concern are 15,16...