[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 #4 from Pascal Bürklin <pascal.buerklin at gmail.com> ---
Since I have the same Laptop I can confirm, that I am having this issue too. I
spent the last week troubleshooting it and therefor I want to share my current
state. First of all it's not only with the X server. This bug appears on the
same hardware when you try to load the i915 module with the option 'modeset'
set to 1 (enabled). Also it is able to boot into the kernel as long as you keep
the option set to 0. (Sadly you're not able to start an X server then) Further
investigation (Thanks to the reporter) led me to analyze the workaround:
(IMPORTANT FROM NOW ON ITS YET THEORETICAL ONLY, I am investigating further).
Since the workaround in drivers/gpu/drm/i915/intel_dp.c forces the first block
to never be executed, also nothing else changed, beside the addition of the if
statement in line 2033 (I checked everything else). Therefor the bug is caused
by the function (line 1882) 'intel_dp_dsc_compute_config', which returns true
instead of false.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the QA Contact for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20190311/bf9bb72f/attachment.html>