Created attachment 68683 [details]
Using AMD A4-3420M APU, have NOT been able to use the R600 driver on either Suse (12.x, factory), Arch Linux (latest built, or git xorg/mesa/dri build), or Ubuntu (12.04, 12.10b2). ALL various combinations of xorg 1.12/1.13, xorg-video-ati, mesa, and kernel 3.5-3.6 give the same black screen after startup, transition to Xorg corrupts all VT's.
KMS for Single user or non-X sessions works fine. Grub boot with "radeon.audio=0" does alleviate some corruption on VT7 (but not enough to be usable). Changing accel options or even disabling accel has no effect.
Appears there is something specific to the A4-3420M(6410D, chipID 0x9644, identified by system as a Sumo2) that is affected by this.
Created attachment 68684 [details]
dmesg, booted drm.debug=6
Can your try kernel 3.7? There were some fixes that went in that may help.
(In reply to comment #2)
> Can your try kernel 3.7? There were some fixes that went in that may help.
Still the same. Upgraded xorg on Ubuntu (from xorg-edgers ppa), added 3.7.0-rc1 mainline kernel from Ubuntu kernel team.
Created attachment 68713 [details]
Ubuntu updated Xorg.0.log
Created attachment 68714 [details]
3.7.0-rc1 dmesg (no debug)
Created attachment 68717 [details]
3.7.0-rc1 dmesg (drm.debug=6)
Can you try a mesa 8.0.x release? This might be a duplicate of bug 56405.
Created attachment 69579 [details]
Debian Sid w/3.6.8-pf dmesg (drm.debug=6)
Switched system to Debian Sid, clean install. Sid is tracking 8.0.5-1 mesa
Screen corruption still, using Sid 3.2.0-4 stock kernel, and 3.6.8-pf kernel from here: http://kernel.night-leshiy.ru/
Attaching drm.debug=6 dmesg from Debian 3.6.8-pf kernel
Created attachment 69580 [details]
Debian Sid w/3.6.8-pf xorg.0.log (fail)
Xorg.0.log from above failure (Debian Sid, 3.6.8-pf kernel)
Of note: with most kernel combo and 8.0 mesa branch (also tried on Arch Linux), failures and corruption DO NOT prevent VT-switching as the 9.0 branch does.
Created attachment 72306 [details]
Still same issue, linux-3.8-rc1. Can see mouse on black background. Cannot switch VTs.
ati-dri (mesa ATI driver) 9.0.1
Created attachment 72307 [details]
xorg log. Not using any custom directives in xorg.conf (blank)
you can try
-- GitLab Migration Automatic Message --
This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.
You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/307.