<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [SNB, IVB] Page flips hang indefinitely, apparently waiting for mmio writes that never happen" href="https://bugs.freedesktop.org/show_bug.cgi?id=75502#c14">Comment # 14</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [SNB, IVB] Page flips hang indefinitely, apparently waiting for mmio writes that never happen" href="https://bugs.freedesktop.org/show_bug.cgi?id=75502">bug 75502</a> from <a class="email" href="mailto:simon@farnz.org.uk" title="Simon Farnsworth <simon@farnz.org.uk>"> Simon Farnsworth</a> <pre>Created <a href="attachment.cgi?id=95088" name="attach_95088" title="Error state that goes with the hang">attachment 95088</a> <a href="attachment.cgi?id=95088&action=edit" title="Error state that goes with the hang">[details]</a> Error state that goes with the hang Had a hopeful event - I've got the failure recurring, with an error state this time. Ickle's patch gets me: # cat /sys/kernel/debug/dri/0/i915_gem_pageflip Flip queued on pipe A (plane A) Flip queued on frame 32131, now 3102655 Stall check enabled, 1 prepares Old framebuffer gtt_offset 0x00372000 New framebuffer gtt_offset 0x08022000 MMIO update completed? 0 No flip due on pipe B (plane B) showing that the flip hasn't happened, so it's not unblocking. I'm not 100% confident that the failure and the error state coincide in time - I'm happy to be told that they're not linked, and that I should report the error state as a separate bug.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>