<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Intel driver crashes when undocking Lenovo T450s" href="https://bugs.freedesktop.org/show_bug.cgi?id=94250#c11">Comment # 11</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Intel driver crashes when undocking Lenovo T450s" href="https://bugs.freedesktop.org/show_bug.cgi?id=94250">bug 94250</a> from <a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> Chris Wilson</a> <pre>(In reply to cs_gon from <a href="show_bug.cgi?id=94250#c7">comment #7</a>) > Created <a href="attachment.cgi?id=121918" name="attach_121918" title="Xorg.0.log.1">attachment 121918</a> <a href="attachment.cgi?id=121918&action=edit" title="Xorg.0.log.1">[details]</a> > Xorg.0.log.1 > > Xorg log for assertion > > (EE) sna_dri2_event_free:1663 assertion '!info->signal' failed That is not a huge issue, just a bit of debug code needs cancelling along the error path. (In reply to cs_gon from <a href="show_bug.cgi?id=94250#c10">comment #10</a>) > Created <a href="attachment.cgi?id=121921" name="attach_121921" title="stack_trace2.txt">attachment 121921</a> <a href="attachment.cgi?id=121921&action=edit" title="stack_trace2.txt">[details]</a> > stack_trace2.txt > > stack trace for assertion > > (EE) sna_dri2_schedule_flip:3078 assertion 'info->front == front' failed This is actually more of an issue. This should reduce the assert commit 3593a2d18928f74ee470f824dc34b8b5b148ce2d Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Date: Tue Feb 23 14:36:10 2016 +0000 sna/dri2: Reset front pointer on frame event across a modeset If the root window's pixmap is changed (e.g. to resizing the framebuffer) then an outstanding flip becomes invalid. The invalid flip is marked as having a stale front, and that triggers an assertion if the user then tries to schedule flip before the pending flip event is processed. References: <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED FIXED - U+2053 SWUNG DASH should be wider than U+007E TILDE" href="show_bug.cgi?id=9425">https://bugs.freedesktop.org/show_bug.cgi?id=9425</a> Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> but it is still a little bit of a puzzle how we did not drain the event queue first. That's probably explained by commit 4cd43faa646e368624079b73b216f6546ede5c16 Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Date: Tue Feb 23 14:40:39 2016 +0000 sna: Flush the DRM event queue after a modeset Changing the mode will cause the DRM events(pageflips, vblanks) to be completed and the queue flushed. After applying the CRTC, drain the event queue. Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>