Screen tearing (some tiles rendered with offset) especially when scrolling etc. in DualHead mode on HD4350
Submitted by Grzegorz Wierzowiecki
Assigned to xf86-video-ati maintainers
Description
I've met many problems with scrolling and window moving, but not only.
In some apps, like OO-calc I meet wrongly rendered table... like part of screen copied and pasted with some offset in x and y axes. (Moving cursor refreshes those fragments, minimising and maximising window also might help... but enforcing refreshment is - at least - not comfortable).
In my case - ATI HD4350 PCI-E - problem appears when using DualHead mode,
with turned off KDE Composition (OpenGL) in order to use basic rendering techniques (when using Composition, OpenGL etc. KDE crashes and X-Server restarts... but when playing OpenGL games like TuxRacer everything is ok).
My setup is to 1900x1200 monitors in Dual Head, one is in pivot.
When using single head setup it is ok.
What I've found, is that
Putting option:
Option "AccelDFS" "off"
into xorg.conf, helped (even I have PCI-E card), not rendering is correct, but performance decreased dramatically.
My software version is
$ LC_ALL=en pacman -Qi xorg-server | grep Version
Version : 1.8.1.902-1
$ LC_ALL=en pacman -Qi xf86-video-ati | grep Version
Version : 6.13.0-1
How could I help you to fix this?
(btw. Is it right place to file such bug, or is there better?)