https://bugzilla.kernel.org/show_bug.cgi?id=39612
Summary: radeon blocks with new style fencing Product: Drivers Version: 2.5 Kernel Version: >= 2.6.37 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) AssignedTo: drivers_video-dri@kernel-bugs.osdl.org ReportedBy: linas_fi@ymail.com CC: alexdeucher@gmail.com Regression: Yes
I am using a Radeon HD 3600 in kernel 2.6.36 with xf86-video-ati (KMS). Since 2.6.37 when starting the X server the screen goes black and never shows the desktop.
kernel 2.6.36 startx -> Screen goes black -> The wallpaper appears -> The DE loads
kernel >= 2.6.37 startx -> Screen goes black -> You can't switch virtual terminals -> REISUB -> Downgrade kernel
Reproducible: Always
Bisecting shows that it started failing at d0f8a854c340986359a3b0a97e380c71def7a440: drm/radeon/kms/r6xx+: use new style fencing (v3)
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.37.y.git;a=commit...
Downstream bug https://bugs.archlinux.org/task/23422