powernow-k8 module gets stuck switching powerlevels on dualcore AMD64
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------- Comment #21 from [email protected] 2007-06-20 17:22 ------- Can you please confirm that the problem is still there with the new 2.6.22-rc5+?
Thanks.
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------- Comment #22 from [email protected] 2007-11-26 03:08 ------- I have exactly the same problem "powernow-k8: failing targ, change pending bit set" with a VIA K8M890 + VT8237A Chipset and the kernel 2.6.22.5. Is there a chance that the problem is fixed in 2.6.23.X ?
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------- Comment #23 from [email protected] 2007-11-26 13:28 ------- If you get a message that there is a hardware error, it is unlikely that upgrading your kernel will fix your hardware. The problem is probably not fixed in 2.6.23.X because it is a hardware error.
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------- Comment #24 from [email protected] 2007-12-09 23:01 ------- Is this a hardware bug of all VIA K8M890 chips? It seems that many users with the K8M8xx has the problem. Is it possible to write a workaround for buggy hardware or it's better to dispose this board?
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------- Comment #25 from [email protected] 2007-12-11 22:41 ------- I guess it's a fair question. The faulty chipset was identified, but I'm not sure a workaround has been found. Mark, do you think it is possible to quirk this board? downgrade/restrict governor to something like performance, or user space and have frequency changed "gently" by careful user process?
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------- Comment #26 from [email protected] 2007-12-12 09:03 ------- It might be possible to quirk the board, but I don't know that cpufreq has the infrastructure to handle it.
I certainly don't have time to write the patch, nor hardware to test it on, but I will support/answer questions for anyone who wants to give it a try.
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------- Comment #27 from [email protected] 2008-04-22 01:00 ------- Hi everybody:
I have added comments in bugs 6382 and 8547 because I think they are duplicates of this problem. I also proposed to follow the solution in this bug as it seems the most active/explanatory.
Mark and Natalie: I'm thinking in setting the governor to userspace and make a program to do smooth transitions (for example: no more than one per second). Do you think that would suffice to bypass the problem? Also, do you think this can be achieved by using powerfreqd or a custom script/daemon should be written?
Thanks for your help.
Ivan
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