Yes, the bug still exists. Attaching trace:
Aug 20 13:36:55 naamaG kernel: [ cut here ]
Aug 20 13:36:55 naamaG kernel: pipe state doesn't match!
Aug 20 13:36:55 naamaG kernel: WARNING: CPU: 4 PID: 22386 at
/build/linux-wuhukg/linux-4.15.0/drivers/gpu/drm/i915/intel_displ
I ran the following the command:
xrandr --output DP-2-1 --off; sleep 2; xrandr --output DP-2-1 --mode
1920x1080 --pos 1920x0; sleep 1; xrandr --output DP-2-2 --off; sleep 2;
xrandr --output DP-2-2 --pos 3840x0 --mode 1920x1080
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Public bug reported:
Jul 25 13:45:51 naamaG kernel: [310183.206113]
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun
Jul 25 13:45:51 naamaG kernel: [310183.270735]
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO
underrun
Jul 25 13:45:51
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