<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [ILK] black flashes and black screen with modesetting or wayland" href="https://bugs.freedesktop.org/show_bug.cgi?id=97498#c8">Comment # 8</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [ILK] black flashes and black screen with modesetting or wayland" href="https://bugs.freedesktop.org/show_bug.cgi?id=97498">bug 97498</a> from <a class="email" href="mailto:grouchomarx.fr@gmail.com" title="groucho <grouchomarx.fr@gmail.com>"> groucho</a> <pre>In case it might help, I have made a reverse bisect a few months back and here is the commit that fixed the issue for UXA and SNA. Since many distros seem to be moving to modesetting (and wayland), it would be great to have even just a workwaround. commit e2e407dc093f530b771ee8bf8fe1be41e3cea8b3 Author: Matt Roper <email address hidden> Date: Mon Feb 8 11:05:28 2016 -0800 drm/i915: Pretend cursor is always on for ILK-style WM calculations (v2) Due to our lack of two-step watermark programming, our driver has historically pretended that the cursor plane is always on for the purpose of watermark calculations; this helps avoid serious flickering when the cursor turns off/on (e.g., when the user moves the mouse pointer to a different screen). That workaround was accidentally dropped as we started working toward atomic watermark updates. Since we still aren't quite there yet with two-stage updates, we need to resurrect the workaround and treat the cursor as always active. v2: Tweak cursor width calculations slightly to more closely match the logic we used before the atomic overhaul began. (Ville) Cc: <email address hidden> Cc: <email address hidden> Cc: <email address hidden> Reported-by: <email address hidden> Reported-by: <email address hidden> Bugzilla: <a class="bz_bug_link bz_status_CLOSED bz_closed" title="CLOSED FIXED - [SKL] Screen flickering" href="show_bug.cgi?id=93892">https://bugs.freedesktop.org/show_bug.cgi?id=93892</a> Fixes: 43d59eda1 ("drm/i915: Eliminate usage of plane_wm_parameters from ILK-style WM code (v2)") Signed-off-by: Matt Roper <email address hidden> Link: <a href="http://patchwork.freedesktop">http://patchwork.freedesktop</a>.<email address hidden> (cherry picked from commit b2435692dbb709d4c8ff3b2f2815c9b8423b72bb) Signed-off-by: Jani Nikula <email address hidden> Link: <a href="http://patchwork.freedesktop.org">http://patchwork.freedesktop.org</a><email address hidden> :040000 040000 545634aa608f59cd8959a6196761450afa57ee5b 7b3259c003cbd1e27e02c976d73af848f69d248c M drivers</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>