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With up-to-date Intel drivers (HD4000) on Ubuntu 14.04 with Unity, rotating the screen xrandr -o leftbreaks the vsync and induces a lot of tearing (mostly vertical one when dragging a window), I get no tearing on a non-rotated screen.

The tear-free option seems disabled: $ cat /var/log/Xorg.0.log | grep Tear [ 18.316] (**) intel(0): "Tear free" disabled

But in 14.04, I can't find a xorg.conf with the intel device configuration to pass the TearFree option.

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  • Could you insert a screenshot of the tearing? I didn't get this error message.
    – Tim
    May 30, 2014 at 15:35
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    xorg.conf to enable TearFree
    – bain
    May 30, 2014 at 18:27
  • Are you using Unity? Unity should not require TearFree. This sounds like a bug, you should report it on Launchpad and on freedesktop.org (follow these instructions) There is also a mailing list (details)
    – bain
    May 30, 2014 at 18:29
  • @bain I'm using Unity, I'll report the bug.
    – Olivier
    May 31, 2014 at 7:44

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