<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [snb 3.5] stale semaphore sync seqno (typically as seen on bcs->rcs)" href="https://bugs.freedesktop.org/show_bug.cgi?id=54226#c100">Comment # 100</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [snb 3.5] stale semaphore sync seqno (typically as seen on bcs->rcs)" href="https://bugs.freedesktop.org/show_bug.cgi?id=54226">bug 54226</a> from <a class="email" href="mailto:dan.doel@gmail.com" title="Dan Doel <dan.doel@gmail.com>"> Dan Doel</a> <pre>I have, I think, a reliable way to trigger this behavior, if that helps. It requires a non-trivial setup, though. I have gnome-shell running on dual monitors. The first is 1920x1200, the second is 1920x1080 (not sure if the resolution difference matters). If I run a full-screen game on The 1920x1200 monitor, I get freezes, and notes in the dmesg about hangcheck timers and kickrings ("stuck wait on blitter ring"). I believe OpenGL acceleration of the desktop is important, because the freezes are not triggered in fluxbox, for instance. I'm not sure if the game itself needs to be using OpenGL, or if the full-screen window is the triggering factor, or something else entirely. It is important that the game keep the monitors distinct, and only go full screen on one. I just tried it on Battle for Wesnoth, and full screen there sets the monitors to mirror, which doesn't trigger the problem. This is on an i7 4770, if that matters. I realize this is may be difficult to put together for a test setup, but I thought I'd mention it.</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> </ul> </body> </html>