http://bugs.freedesktop.org/show_bug.cgi?id=26616
Summary: [KMS] cannot find CRTC for LVDS; regression
Product: xorg
Version: git
Platform: x86 (IA32)
OS/Version: Linux (All)
Status: NEW
Severity: major
Priority: medium
Component: Driver/Radeon
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
Created an attachment (id=33367)
--> (http://bugs.freedesktop.org/attachment.cgi?id=33367)
Output from `dmesg`
There is currently a regression in drm-radeon-testing branch of GIT kernel
source. The problem was originally fixed in bug #25150.
Symptoms:
LVDS shows only horizontal stripes during boot and changes color to white.
Monitor connected to DVI-0 runs well, X.org starts and runs on DVI-0 only.
Running
xrandr --output LVDS --auto
shows "cannot find crtc for LVDS", but running
xrandr --output DVI-0 --off
xrandr --output HDMI-0 --off
xrandr --output LVDS --auto
xrandr --output DVI-0 --auto
shows the screen correctly. I've bisected the drm-radeon-testing branch and the
first problematic commit is bcc1c2a1d22974215e39dc87ce746ba9a39223e5
"drm/radeon/kms: add initial Evergreen support (Radeon HD 5xxx)".
dmesg and Xorg.log attached.
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