(SUMO2) Black screen on X Launch, corrupted VTs when using KMS
Submitted by Tony Thomas
Assigned to Default DRI bug account
Created attachment 68683
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.
Attachment 68683, "Xorg.0.log":