| Summary: | Black screen with KMS on powerpc iBook | ||||||||||
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| Product: | xorg | Reporter: | Dan DeVoto <dand1972> | ||||||||
| Component: | Driver/Radeon | Assignee: | xf86-video-ati maintainers <xorg-driver-ati> | ||||||||
| Status: | RESOLVED MOVED | QA Contact: | Xorg Project Team <xorg-team> | ||||||||
| Severity: | major | ||||||||||
| Priority: | medium | CC: | pedretti.fabio | ||||||||
| Version: | unspecified | ||||||||||
| Hardware: | PowerPC | ||||||||||
| OS: | Linux (All) | ||||||||||
| URL: | https://bugs.debian.org/683796 | ||||||||||
| Whiteboard: | |||||||||||
| i915 platform: | i915 features: | ||||||||||
| Attachments: |
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Created attachment 115417 [details]
output of cat /var/Xorg.0.log
Created attachment 115418 [details]
output of lspci -vvv
Oddly, screen mirroring works perfectly. The external monitor shows my desktop as intended, but the iBook's screen remains bleak, I mean, black. I also generated a xorg.conf file to disable acceleration, but it didn't help. This line in dmesg indicates a problem with the dot clock: [drm:drm_calc_timestamping_constants] *ERROR* crtc 14: Can't calculate constants, dotclock = 0! The issue: [...] [drm:drm_calc_timestamping_constants] *ERROR* crtc 14: Can't calculate constants, dotclock = 0! [...] can also be seen here: https://bugs.freedesktop.org/show_bug.cgi?id=91428 -- GitLab Migration Automatic Message -- This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/xorg/driver/xf86-video-ati/issues/129. |
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Created attachment 115416 [details] 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