[Bug 109959] REGRESSION: black screen with linux 5.0 when starting X

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109959

--- Comment #93 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Emanuele Panigati from comment #92)
> (In reply to Ville Syrjala from comment #91)
> > Unfortunately the revert [1] broke some other eDP panels. I tried to come up
> > with a new plan that would handle both types of panels.
> > 
> > I'd appreciate if someone whose machine was fixed by the revert could test
> > the patch in bug 110511 comment 24 so that I don't end up re-breaking things
> > again.
> > 
> > [1] commit 21635d7311734d2d1b177f8a95e2f9386174b76d
> > Author: Jani Nikula <jani.nikula at intel.com>
> > Date:   Fri Apr 5 10:52:20 2019 +0300
> > 
> >     drm/i915/dp: revert back to max link rate and lane count on eDP
> 
> Maybe I can try it tomorrow, I let you know if I test it.
> Which kernel sources I can start from to patch & build? 5.2?

Looks like it should apply to 5.2 without much pain. Or you can grab my git
branch directly:
git://github.com/vsyrjala/linux.git dp_retry_max_vs_optim

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