<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [Regression] Horizontal lines on Samsung NP900X3G" href="https://bugs.freedesktop.org/show_bug.cgi?id=106943#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [Regression] Horizontal lines on Samsung NP900X3G" href="https://bugs.freedesktop.org/show_bug.cgi?id=106943">bug 106943</a> from <a class="email" href="mailto:frank@winklmeier.name" title="Frank Winklmeier <frank@winklmeier.name>"> Frank Winklmeier</a> <pre>(In reply to Jani Nikula from <a href="show_bug.cgi?id=106943#c1">comment #1</a>) > Does the Ubuntu kernel have backports of this stuff that you have to revert? Yes, it seems they backport some of this. E.g.: <a href="http://kernel.ubuntu.com/git/ubuntu/ubuntu-xenial.git/log/?h=hwe&qt=grep&q=training">http://kernel.ubuntu.com/git/ubuntu/ubuntu-xenial.git/log/?h=hwe&qt=grep&q=training</a> > I'm wondering what the relevant fixes would be in this case. Is 368b554d6394 > ("Revert "drm/i915/edp: Allow alternate fixed mode for eDP if available."") > enough alone on v4.17 release to fix it for you? The situation seems a bit more complicated. From my tests on the 4.13 kernel, I had to revert all of the following four commits: 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" Only reverting the first one did not help (I assume the 2nd and 3rd commit only affect code quality and don't matter here). Looking again at drm-tip I see that "Allow alternate fixed mode..." has been indeed reverted but the "link training" commit is still present. Since I don't see the problem with drm-tip, I assume some of the other changes that went in there (but not mainline) fixed the regression?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>