| Summary: | Radeon with KMS enabled causes X to start flickering ('GPU losing synchronisation') | ||||||||||||
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| Product: | xorg | Reporter: | gijs.hillenius <gijs.hillenius> | ||||||||||
| Component: | Driver/Radeon | Assignee: | xf86-video-ati maintainers <xorg-driver-ati> | ||||||||||
| Status: | RESOLVED FIXED | QA Contact: | Xorg Project Team <xorg-team> | ||||||||||
| Severity: | major | ||||||||||||
| Priority: | medium | ||||||||||||
| Version: | unspecified | ||||||||||||
| Hardware: | x86 (IA32) | ||||||||||||
| OS: | Linux (All) | ||||||||||||
| Whiteboard: | |||||||||||||
| i915 platform: | i915 features: | ||||||||||||
| Attachments: |
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Created attachment 43191 [details]
Dmesg
Please attach a copy of your vbios: (as root) (use lspci to get the bus id) cd /sys/bus/pci/devices/<pci bus id> echo 1 > rom cat rom > /tmp/vbios.rom echo 0 > rom Also, can you try a vanilla kernel? 2.6.36 or 2.6.37 or 2.6.38 from Linus git tree? Created attachment 43226 [details]
attached is a copy of my vbios
will also try a newer kernel and report back. Will take a day or two.... Created attachment 43233 [details] [review] possible fix Can you please try the attached patch on top of 2.6.38-rc4 or newer? Just tried it with Linux-image 2.6.37 from Debian Experimental, but that does not fix the screen flickering.. Will look at that patch you just added (thanks!). I confirm, running 2.6.38-rc6 fixes the problem. Thanks Gijs Fixed in 2.6.38rc6. Most likely this patch: 5b40ddf888398ce4cccbf3b9d0a18d90149ed7ff |
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Created attachment 43190 [details] Xorg log, A Thinkpad Z61m has a Radeon Mobility X1400 on board. Up until this weekend, when Debian 6.0 was released, it was fine to use Debian 'testing & unstable' on this laptop, as long as KMS was disabled, by adding "options radeon modeset=0" to "/etc/modprobe.d/radeon-kms.conf". Enabling KMS makes X not very useable, for after a while the screen will start to flicker, sometimes very fast, making everything a blur, and sometimes slower. In all cases, closing & opening the lid of the laptop helps restore X. After Debian 6, newer Xorg related packages came into testing, and disabling KMS was no longer an option, for in that case X simply would not start. I don't know what the issue is, but on the linux-thinkpad mailing list it was described this week as: "The GPU loses somehow its synchronization over time." Attaching the X log output from lspci -v 01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility X1400 (prog-if 00 [VGA controller]) Subsystem: Lenovo Device 202a Flags: bus master, fast devsel, latency 0, IRQ 30 Memory at d8000000 (32-bit, prefetchable) [size=128M] I/O ports at 2000 [size=256] Memory at ee000000 (32-bit, non-prefetchable) [size=64K] [virtual] Expansion ROM at ee020000 [disabled] [size=128K] Capabilities: <access denied> Kernel driver in use: radeon Debian Linux, linux-image 2.6.32-5-686