I just compiled my own 4.13.0-43 kernel reverting all of the above 4
commits and I confirm that this fixes the problem with the horizontal
lines:
[winki] ~/git/ubuntu-xenial > uname -a
Linux winki 4.13.0-43-generic #48~16.04.1 SMP Sat Jun 16 11:59:59 CEST 2018
x86_64 x86_64 x86_64 GNU/Linux
[winki] ~/git/ubuntu-xenial > git log --oneline
HEAD...Ubuntu-hwe-4.13.0-43.48_16.04.1 | cat
fd18173 Revert "drm/i915/edp: Allow alternate fixed mode for eDP if available."
4fb94d0 Revert "drm/i915/dp: rename intel_dp_is_edp to intel_dp_is_port_edp"
7547d0c Revert "drm/i915/dp: make is_edp non-static and rename to
intel_dp_is_edp"
cb6c81f Revert "drm/i915/edp: Do not do link training fallback or prune modes
on EDP"
So now that we identified the problematic commits, what are the next
steps?
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https://bugs.launchpad.net/bugs/1773581
Title:
[Samsung NP900X3G-S01US] Horizontal lines after update to 4.13.0-43
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