Black screen with KMS on powerpc iBook
Submitted by Dan DeVoto
Assigned to xf86-video-ati maintainers
Description
Created attachment 115416
dmesg output
In Debian Jessie, I get a black screen booting with KMS enabled. The backlight remains lit, but the screen displays as black. It happens on boot up about when these lines appear:
[ 16.797096] [drm] Initialized drm 1.1.0 20060810
[ 18.117763] [drm] radeon kernel modesetting enabled.
From then on I can log in blind, and I'm running pbbuttonsd so the brightness keys can dim or brighten the screen, but it always remains black. Switching to a console also gives me a black screen.
Adding the kernel parameters video=offb:off radeon.modeset=1 radeon.agpmode=-1 changed nothing.
This isn't a new problem, I've had it in previous Debian releases, but I hope someone might take a crack at this. Right now the only workaround is to disable KMS and work with a very slow desktop (and no mplayer or vlc fullscreen upscaling).
This is on an G3 iBook (M8603LL/A - PowerBook4,3 - A1007)
Thanks,
Dan
Attachment 115416, "dmesg output":
dmesg.txt