Bug 52941 - CPU recognition bug for AMD
Summary: CPU recognition bug for AMD
Status: CLOSED PATCH_ALREADY_AVAILABLE
Alias: None
Product: Power Management
Classification: Unclassified
Component: cpufreq (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: cpufreq
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-01-23 12:59 UTC by Sogn
Modified: 2013-02-08 17:30 UTC (History)
1 user (show)

See Also:
Kernel Version: 3.7.4-1-ARCH
Subsystem:
Regression: No
Bisected commit-id:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Description Sogn 2013-01-23 12:59:02 UTC 
Hi.

Since the 3.7.3 kernel, the cpu recognition bug [AMD Phenom II X4 965 Black Edition @ 3.4 GHz].

-> /etc/conf.d/cpupower :
governor='ondemand'
min_freq="0.80GHz"
max_freq="3.39GHz"

-> cpupower frequency-info
analyse du CPU 0 :
  pas de pilotes cpufreq reconnu pour ce CPU
  boost state support:
    Supported: no
    Active: no

My cpu is no longer recognized and freq stay stuck at max.

But, after a few minutes (more than 20) or a few hours my cpu is again recognized...
-> cpupower frequency-info
analyse du CPU 0 :
  pilote : acpi-cpufreq
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 4.0 us.
  limitation matérielle : 800 MHz - 3.40 GHz
  plage de fréquence : 3.40 GHz, 2.70 GHz, 2.20 GHz, 800 MHz
  régulateurs disponibles : ondemand, performance
  tactique actuelle : la fréquence doit être comprise entre 800 MHz et 3.40 GHz.
                  Le régulateur "ondemand" est libre de choisir la vitesse
                  dans cette plage de fréquences.
  la fréquence actuelle de ce CPU est 3.40 GHz.
  boost state support:
    Supported: no
    Active: no
Comment 1 Sogn 2013-01-30 18:34:23 UTC 
Fixed with last kernel upgrade (3.7.5).
Note You need to log in before you can comment on or make changes to this bug.