[Bug 93679] New: Heavy tearing with xf86-video-intel
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Tue Jan 12 08:19:38 PST 2016
https://bugs.freedesktop.org/show_bug.cgi?id=93679
Bug ID: 93679
Summary: Heavy tearing with xf86-video-intel
Product: DRI
Version: XOrg git
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: DRM/Intel
Assignee: intel-gfx-bugs at lists.freedesktop.org
Reporter: carstenmattner at gmail.com
QA Contact: intel-gfx-bugs at lists.freedesktop.org
CC: intel-gfx-bugs at lists.freedesktop.org
I'm consistently seeing heavy tearing in Firefox and mpv on Intel HD
Graphics 3000 (i7 2640M), even with _any combination_ of the following
xorg.conf settings. Tested on linux 4.1.15 and 4.3.3.
Option "DRI" "3"/"2"
Option "TearFree" "true"/"false"
Option "SwapbuffersWait" "true"/"false"
Option "AccelMethod" "glamor"/"sna"
It happens with all video-out modes in mpv (x11, xv, vaapi, opengl,
opengl-hq), with or without vaapi decoding. The only way to avoid this
is by running 'compton --backend xr_glx_hybrid --vsync opengl-swc. But
this is a workaround that forces vsync unconditionally for everything,
anytime, with its disadvantages.
Aren't TearFree and SwapbuffersWait supposed to prevent this?
On 945GM, with no custom Xorg configuration, I see minimal tearing in
Firefox and sometimes mpv, which also can be worked around with forced
vsync. Tested on linux 4.1.15.
Distro: Arch Linux
Kernel: 4.1.15 and 4.3.3
Driver: xf86-video-intel 1:2.99.917+519+g8229390
Xorg: xorg-server 1.18.0-4
mpv: 0.14.0
There are no warnings or errors in any of the logs.
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