<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [BDW rc6] GPU hang playing a video" href="https://bugs.freedesktop.org/show_bug.cgi?id=83207#c16">Comment # 16</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [BDW rc6] GPU hang playing a video" href="https://bugs.freedesktop.org/show_bug.cgi?id=83207">bug 83207</a> from <a class="email" href="mailto:gary.c.wang@intel.com" title="Gary Wang <gary.c.wang@intel.com>"> Gary Wang</a> <pre>Created <a href="attachment.cgi?id=107215" name="attach_107215" title="Enable using BCS for pageflips in gen7/7+/8">attachment 107215</a> <a href="attachment.cgi?id=107215&action=edit" title="Enable using BCS for pageflips in gen7/7+/8">[details]</a> Enable using BCS for pageflips in gen7/7+/8 It verified this issue in HP Stag BW C2 Sku device/BIOS B.38 for kernel 3.13 (<a href="https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tag/?id=v3.13">https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tag/?id=v3.13</a>) with "drm-i915-always-enable-BCS-to-gen7-later" patch applied. It forces to using BCS pageflips for Ivybridge and later. The GPU hang with ecode:0xf5dffffe went away in kernel 3.13+patch, and UbuntuBoot.ogv playback worked well (via firstboot-video provided by Canonical). test #1, test cycle with 1345 times overnight, pass test #2, test cycle with 100 times, pass test #3, test cycle with 123 times, pass test #4, test cycle with 132 times, pass test #4, test cycle with 50 times, pass The random UI freeze (like # 77104, <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED FIXED - [ivb rcs flips 3.14] GPU sporadically hangs during normal desktop usage" href="show_bug.cgi?id=77104">https://bugs.freedesktop.org/show_bug.cgi?id=77104</a>) didn't be happened again until now. Gary</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> <li>You are the assignee for the bug.</li> </ul> </body> </html>