[Bug 108860] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108860

--- Comment #23 from Lakshmi <lakshminarayana.vudum at intel.com> ---
(In reply to Nick Desaulniers from comment #21)
> I just booted a fresh build of drm-tip as suggested in
> https://bugs.freedesktop.org/show_bug.cgi?id=99344#c13.
> 
> 
> $ dmesg | grep fifo 
> [    5.549241] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
> pipe A FIFO underrun
> 
> $ cat /proc/version
> Linux version 5.2.0-rc4+ (nick at nick-Blade-Stealth) (clang version 9.0.0
> (https://github.com/llvm/llvm-project.git
> 80fee25776c2fb61e74c1ecb1a523375c2500b69)) #32 SMP Sat Jun 15 17:34:43 PDT
> 2019
> 
> $ cd linux
> $ git show -1
> commit 39e3d39be374d48ba73b61ec34f19a0afd5ac6f4 (HEAD -> drm-tip,
> drm-tip/drm-tip)
> Author: Matt Roper <matthew.d.roper at intel.com>
> Date:   Sat Jun 15 08:21:37 2019 -0700
> 
>     drm-tip: 2019y-06m-15d-15h-20m-54s UTC integration manifest
> ...

The impact of this issue is screen flickering? or blank screen? or both? How
often it happens? Asking this to know the severity of this issue.

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