[Bug 108462] two external screens permanently go blank on HP EliteBook Folio G1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108462

--- Comment #10 from Johannes Berg <johannes at sipsolutions.net> ---
(In reply to Imre Deak from comment #9)
> The log at
> https://bugs.freedesktop.org/attachment.cgi?id=142054
> has pipe underruns on all 3 pipes, so I suspect some watermark problem.
> 
> The log at
> https://bugs.freedesktop.org/attachment.cgi?id=142057
> doesn't have any obvious issues, 

I'm pretty sure that the second log had the issue at least once.

> but that could just be due to underrun
> reporting being disabled at that time.

but I suppose that's possible.

> Any chance that you could do a bisect?

Technically yes, since I know it was fine around 4.15 time-frame, but it'll
take ... forever, especially on this machine. Any other ideas would be nicer...
:-)

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