[Bug 97873] Video tearing since update xf86-video-ati (1:7.7.0-1 -> 1:7.7.1-1)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97873

--- Comment #5 from joeri.exelmans at gmail.com ---
Exactly the same problem here. Tearing starting from upper left corner, in a
45% angle and then horizontally somewhere in the 1/3 upper part of the screen.
Clearly some attempt at VSync is being made cause the lower half of the screen
is always perfectly smooth.

OS: Ubuntu Gnome 16.04
Radeon HD 6320
Using radeon driver from Oibaf PPA (package named xserver-xorg-video-radeon,
version: 1:7.8.99+git1612191933.720dd0~gd~x)

It's not just a video playback problem, in Gnome (Mutter compositor) the
tearing applies to the entire screen, so it also occurs when dragging a window.
There is no tearing when starting a 'Gnome on Wayland' session. Also no tearing
when running Kodi in Wayland (through XWayland, which works surprisingly well).

I'm using almost the same configuration as tobias.brunn:

20-radeon.conf 
Section "Device"
        Identifier  "Radeon"
        Driver "radeon"
        Option "DRI" "3"
        Option "TearFree" "on"
EndSection

Removing options DRI3 and TearFree makes no difference.

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