https://bugs.freedesktop.org/show_bug.cgi?id=90220
Bug ID: 90220
Summary: Black screen with KMS on powerpc iBook
Product: xorg
Version: unspecified
Hardware: PowerPC
OS: Linux (All)
Status: NEW
Severity: major
Priority: medium
Component: Driver/Radeon
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
Created attachment 115416
--> https://bugs.freedesktop.org/attachment.cgi?id=115416&action=edit
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
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