Public bug reported:
It was brought to my attention the following:
Ubuntu Trusty Kernel 3.13 is suffering from cpufreq initialization
failure for some cpu cores on Proliant Servers.
/sys/devices/system/cpu# for cpu in `ls -1d cpu[0-9]*`; do ls -ld $cpu/cpufreq;
done
drwxr-xr-x 2 root root 0 Apr 2 16:15 cpu0/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu1/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu10/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu11/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu12/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu13/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu14/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu15/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu16/cpufreq
ls: cannot access cpu17/cpufreq: No such file or directory
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu18/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu19/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu2/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu20/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu21/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu22/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu23/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu24/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu25/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu26/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu27/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu28/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu29/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu3/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu30/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu31/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu4/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu5/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu6/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu7/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu8/cpufreq
drwxr-xr-x 2 root root 0 Apr 2 16:16 cpu9/cpufreq
With the following message:
[ 2.465616] pcc-cpufreq: (v1.10.00) driver loaded with frequency limits: 1200
MHz, 2200 MHz
[ 2.474810] cpufreq: __cpufreq_add_dev: ->get() failed
Disabling Collaborative Power Control into firmware setup mitigates the
issue.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Rafael David Tinoco (inaddy)
Status: In Progress
** Tags: cts
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Rafael David Tinoco (inaddy)
** Changed in: linux (Ubuntu)
Status: New => Confirmed
** Changed in: linux (Ubuntu)
Status: Confirmed => In Progress
** Tags added: cts
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https://bugs.launchpad.net/bugs/1447763
Title:
HP Proliant Servers suffer from cpufreq initialization failure for
some cpu cores
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https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1447763/+subscriptions
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