Red Hat Bugzilla – Bug 366831
kacpi_notify consuming lot of CPU
Last modified: 2015-01-04 17:29:58 EST
Description of problem:
After installing latest kernel, system sometimes halts for few seconds.
When halts happen, "top" shows [kacpi_notify] consuming all available CPU.
There is no messages neither in dmesg nor system logs.
Right now my system looks like hung, but responds to ping over network.
Alsa I can't loging by ssh.
Hardware is Sun Java Workstation w1100z with single Opteron 150, 1 GB RAM.
Version-Release number of selected component (if applicable):
Fedora 7 up-to-date as today, kernel 22.214.171.124-10.fc7
Sun w1100z with latest BIOS: R01-B5 S1
Happens very often.
Disabling cpufreq (AMD PowerNow!) in BIOS seems to fix this issue.
I'm reviewing this bug as part of the kernel bug triage project, an attempt to
isolate current bugs in the Fedora kernel.
I am CC'ing myself to this bug and will try and assist you in resolving it if I can.
There hasn't been much activity on this bug for a while. Could you tell me if
you are still having problems with the latest kernel?
If the problem no longer exists then please close this bug or I'll do so in a
few days if there is no additional information lodged.
Yes, this is still happening with 126.96.36.199-85.fc8.
As I noted, disabling cpufreq make this issue go away. Cpufreq could be disabled
in bios or by echoing "performance"/"powersave" to
Okay, thanks for the feedback and additional info. Re-assigning to cpufreq
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