powernow-k8 module gets stuck switching powerlevels on dualcore AMD64
http://bugzilla.kernel.org/show_bug.cgi?id=8264
------- Additional Comments From [email protected] 2007-03-26 14:01 -------
Quoted 5 lines
------- Additional Comments From [email protected] 2007-03-26 13:48 -------
After some more testing, it happens going from low power to high power as well.
Quoted 8 lines
Ex. ramp-up from 1Ghz 1.17 V to 2GHz 1.41 V, it changes to 1.41V but frequency
gets stuck at 1GHz (never reaches the desired 2GHz). dmesg shows again:[13496.636380] powernow-k8: Hardware error - pending bit very stuck - no further pstate changes possible [13496.636388] powernow-k8: transition frequency failed
What chipset are you using? Could you send me the pstate tables the driver prints when it first loads?
At first glance, it looks like you have a hardware error (hence the error message saying that). The processor attempted to perform the transition 1000 times and the chipset never signaled that it was finished.
-Mark Langsdorf
Operating Systems Research Center
AMD, Inc.
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