https://bugzilla.kernel.org/show_bug.cgi?id=83331
Bug ID: 83331 Summary: radeon: Laptop panel out of sync after dpms standby/suspend/off Product: Drivers Version: 2.5 Kernel Version: 3.15.10 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: klaus.kusche@computerix.info Regression: No
I've a problem on my laptop (Dell Precision M6700 with AMD Cap Verde graphics, ChipID = 0x6825) with the radeon driver (radeon-ucode-20140430):
Whenever the X server switches to dpms standby, suspend or off state (it does so after 5 minutes when I'm on battery and idle) and then back to dpms on, the internal panel is out of sync: It is completely unreadable, flashes or shows strange moving patterns. External displays are fine. The problem is independent of the radeon powersave mode (profile or dpm).
The only way to recover is either to power cycle or to blindly type xrandr --output eDP --off xrandr --output eDP --auto
Switching from X to a text (framebuffer) VT does not help: They are also corrupted.
When initializing radeon during boot, the kernel log says radeon 0000:01:00.0: Invalid ROM contents Could that be related? Everything else looks fine. When the problem happens, nothing is written to the kernel log.