[Bug 102144] video tearing since update to xf86-video-ati 1:7.8.99.r16.gea30d856-1

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Aug 14 18:19:30 UTC 2017


--- Comment #5 from Barto <mister.freeman at laposte.net> ---
precisions : I don't use a custom configuration file for radeon in
/etc/X11/xorg.conf.d/ ( there is no radeon.conf file )

so the driver will use the default values,

I use plasma 5 ( kde ), openGL 2.0 is activated in kde for the compositor,

there is no problem with  1:7.8.0-2  version of xf86-video-ati ( and also the
previous versions ),

the bugs starts with the version 1:7.8.99, you have probably introduced
something that triggers a lot of tearings in my graphic card radeon HD4650 (
RV730 pro ), 

I think this bug is easily reproducible, the use case is :

- take an old radeon graphic card, for example radeon HD series 4xxx

- don't use a custom radeon configuration file in /etc/X11/xorg.conf.d/

- use plasma 5 as compositor, with the default value ( openGL 2.0 )

- use a rolling release linux distro, like archlinux 64 bits, all the system
package will be up to date

with this use case you will notice the bug easily when running videos ( with
VLC, mplayer ), a lot of tearing will be visible on scenes ( travelling scenes

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