[Bug 103229] SKL screen flicker and dmesg [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=103229

--- Comment #41 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Lakshmi from comment #40)
> (In reply to Graham Northup from comment #39)
> > > > Can you please attach the dmesg from boot with drmtip?
> > > 
> > > Latest drmtip can be found here (https://cgit.freedesktop.org/drm-tip).
> > 
> > Let me know if you need any more information; the .config was olddefconfig'd
> > from the host 5.1.3 kernel, which is itself defconfig plus some (so it's a
> > bit chunky).
> > 
> > To confirm, uname -a said on this boot:
> > Linux arvarnelios 5.2.0-rc1-drmtip+ #2 SMP Thu May 23 15:54:35 EDT 2019
> > x86_64 GNU/Linux
> > 
> > ...the drm-tip repo was on commit db92db5... .
> > 
> > (Sorry about the spam!)
> 
> Hi, to me this looks a different bug than thye original bug report.
>  From dmesg I can see like this
> 3.942231] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
> uncleared pch fifo underrun on pch transcoder A
> [    3.942342] [drm:cpt_irq_handler [i915]] *ERROR* PCH transcoder A FIFO
> underrun
> 
> This issue could be a duplicate of Bug 102614.
> 
> @Ville, can you correct me if I am wrong.

No idea. No drm.debug=0xe used so can't see anything particularly useful from
the log.

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