[Bug 105175] Blank screens [drm:intel_mst_enable_dp [i915]] *ERROR* Timed out waiting for ACT sent

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105175

--- Comment #6 from Stef <drgspt at gmail.com> ---
(In reply to Jani Saarinen from comment #5)
> First of all. Sorry about spam.
> This is mass update for our bugs. 
> 
> Sorry if you feel this annoying but with this trying to understand if bug
> still valid or not.
> If bug investigation still in progress, please ignore this and I apologize!
> 
> If you think this is not anymore valid, please comment to the bug that can
> be closed.
> If you haven't tested with our latest pre-upstream tree(drm-tip), can you do
> that also to see if issue is valid there still and if you cannot see issue
> there, please comment to the bug.

I just checked the latest kernels again:
4.14.31 - still working
4.15.14 - still failing
4.16-rc7 - working again!

I don't know how to track which drm-tip commits made it into mainline kernel,
but seems like the fix needs to be committed to the 4.15 stable branch.

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