Ubuntu
xserver-xorg-video-intel package

  1. Bug #1390016
  2. Comment #17

Comment 17 for bug 1390016

Revision history for this message
In , Gary Wang (gary-c-wang) wrote :

Created attachment 107215
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 (https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tag/?id=v3.13) 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, https://bugs.freedesktop.org/show_bug.cgi?id=77104) didn't be happened again until now.

Gary