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Hi folks ! |
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|
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I am facing a problem since a week now when enabling radeon power |
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management following KMS Power Management Options [1]. I have two radeon |
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HD 9770 on my system in crossfire configuration, but on Linux I only use |
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one of them (the first one on the PCI bus). |
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|
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When I switch the GPUs using the low profile, randomly, my system |
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hangs. The problem is that I have nothing ! No kernel panic, no logs, |
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really nothing. I tried everything, adding hard and soft lockup |
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detection in the kernel did not help, I also enabled nmi_watchdog |
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without success, tried kexec and kernel crash dumps either. I am getting |
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to the point of booting the kernel using kgdb/kdb over a serial |
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connection... |
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|
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As radeon guys on the IRC #radeon channel seems to be muted on this |
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point, I would like to know if anyone here can lead me through a way to |
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help debugging this problem, as the consequence of staying in default |
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power profile make my GPU "burning" around 70°C... |
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|
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I can provide as many information as possible, and here is a little |
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summary about my configuration: |
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- Gentoo sources 3.2.0-r1, |
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- in-kernel radeon module with KMS enabled, |
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- ~amd64 keyword. |
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Many thanks for your help. |
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[1] http://wiki.x.org/wiki/RadeonFeature#KMS_Power_Management_Options |
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-- |
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YaGB on http://gentooist.com |
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Follow me on twitter @blakawk ;) |
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