[Bug 109376] FIFO underrun, visual glitches and instability with dual monitors

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109376

Lakshmi <lakshminarayana.vudum at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #12 from Lakshmi <lakshminarayana.vudum at intel.com> ---
(In reply to Hin-Tak Leung from comment #10)
> boot to 4.20.12 and the visual glitches happened once on unlock, and have a
> FIFO underrun message also:
> 
> # uname -r
> 4.20.12-042012-generic
> 
> # grep FIFO kern.log
> Mar  5 11:07:44 ... kernel: [ 2669.215740]
> [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO
> underrun

Can you attach full dmesg from boot with 4.20 where you see the issue?

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