[Bug 102643] xf86-video-ati 7.10.0 with EXA acceleration GDM corruption unable to log into GNOME session

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102643

--- Comment #11 from loup001 <ideefixee at hotmail.fr> ---
(In reply to lei.pero from comment #0)
> With xf86-video-ati 7.10.0 and EXA acceleration enabled, GDM gets
> corrupted/unreadable typing password and pressing enter results in black
> screen with mouse pointer drawn, using alt+f2 brings back GDM with proper
> rendering, and then it does log in to Gnome-Shell (it does mess up
> resolution but that's because non-recommended/native resolution is used).
> 
> Using default value with glamor acceleration works as expected, this doesn't
> happen on 7.9.0-2 (both stable packages from Arch repository).
> 
> Reverting package or using glamor solves the problem (HD6770 GPU).

I add a similar problem too.
Using sddm with xfce4.
Login agent 'sddm' with same symptoms as yours.
I fixed it by :
A downgraded xf86-video-ati to previous version,
Adjusted screen set-up to xorg default ( change from 1600x1200 @75hz to 60hz
which is the default set-up for all distro on that machine)
Removed all config in radeon at /etc/X11/xorg.conf.d/10-radeon.conf
Reboot @ upgrade xf86-video-ati to 7.10
Upgraded successfully !
Customized radeon with previous set-up

Hope this work for you if you try !

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