<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Vertical Sync broken on Broadwell" href="https://bugs.freedesktop.org/show_bug.cgi?id=91366#c8">Comment # 8</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Vertical Sync broken on Broadwell" href="https://bugs.freedesktop.org/show_bug.cgi?id=91366">bug 91366</a> from <a class="email" href="mailto:thatslyude@gmail.com" title="Chandler Paul <thatslyude@gmail.com>"> Chandler Paul</a> <pre>Alright, tested it with the latest git HEAD. Vertical sync is still just as broken as before. I think I've noticed it actually work every now and then (there doesn't seem to be much of a pattern here) The kernel option mentioned in the comments here doesn't seem to make any sort of difference in this behavior either. This being said, this is only reproducible under X. The tearing also always happens near the top of the activities bar in a straight line, and doesn't seem to be noticable when 3D acceleration is being used (e.g. if I open up the activities, I see no tearing in the animation, but if I'm typing in a terminal near the top of the screen I'll notice the tearing). If I use xf86-video-modesetting, I can still reproduce tearing but it's quite different. While the intel driver tears at almost a straight line, the modesetting driver tears at a straight line until it almost reaches the right side of the screen, where it suddenly travels 135° downwards for about 200 pixels, then starts going forwards in a straight line up until the end of the screen. The modesetting driver retains this line with the tearing perfectly. In addition, the tearing on the modesetting driver happens regardless of whether or not there's 3D acceleration going on. Running GNOME under Wayland shows no vertical sync issues.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>