Cannot scale AMD Turion CPU frequency. It runs on lowest 800MHz
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Linux |
Incomplete
|
Medium
|
|||
linux (Ubuntu) |
Confirmed
|
Medium
|
Unassigned | ||
linux-lts-xenial (Ubuntu) |
Confirmed
|
Medium
|
Unassigned |
Bug Description
The CPU does not scale frequency on kernel "4.2.0-41-generic #48~14.04.1-Ubuntu SMP Fri Jun 24 17:09:15". The notebook behaves very slow despite on Windows Vista it works great.
Cpufreq-info program shows that there is a limit on the frequency setting between 800MHz and 800MHz. I tried to impose the frequency by setting the "performance policy" or by setting the limit in /etc/default/
Next I tried to check the BIOS limits, because there are some suggestions that some battery/power supply problems could cause the BIOS to set the limits on CPU freq but it is not there.
The CPU freq scaling works good on 'linux-
Hardware: HP Compaq 6715B notebook with AMD Turion CPU TL-58 and powernow-k8 cpufreq driver. I've heard some posts that on others HP notebooks there are similar problems with the freq scaling.
$ cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to <email address hidden>, please.
analyzing CPU 0:
driver: powernow-k8
CPUs which run at the same hardware frequency: 0 1
CPUs which need to have their frequency coordinated by software: 0 1
maximum transition latency: 109 us.
hardware limits: 800 MHz - 1.90 GHz
available frequency steps: 1.90 GHz, 1.80 GHz, 1.60 GHz, 800 MHz
available cpufreq governors: conservative, ondemand, userspace, powersave, performance
current policy: frequency should be within 800 MHz and 800 MHz.
current CPU frequency is 800 MHz.
cpufreq stats: 1.90 GHz:0,07%, 1.80 GHz:0,00%, 1.60 GHz:0,00%, 800 MHz:99,93% (1)
analyzing CPU 1:
driver: powernow-k8
CPUs which run at the same hardware frequency: 0 1
CPUs which need to have their frequency coordinated by software: 0 1
maximum transition latency: 109 us.
hardware limits: 800 MHz - 1.90 GHz
available frequency steps: 1.90 GHz, 1.80 GHz, 1.60 GHz, 800 MHz
available cpufreq governors: conservative, ondemand, userspace, powersave, performance
current policy: frequency should be within 800 MHz and 800 MHz.
current CPU frequency is 800 MHz.
cpufreq stats: 1.90 GHz:0,07%, 1.80 GHz:0,00%, 1.60 GHz:0,00%, 800 MHz:99,93% (1)
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-
ProcVersionSign
Uname: Linux 4.2.0-41-generic x86_64
NonfreeKernelMo
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
CurrentDesktop: KDE
Date: Fri Jul 1 23:49:34 2016
InstallationDate: Installed on 2016-04-08 (83 days ago)
InstallationMedia: Kubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
SourcePackage: linux-lts-wily
UpgradeStatus: No upgrade log present (probably fresh install)
Changed in linux-lts-xenial (Ubuntu): | |
status: | New → Confirmed |
tags: | added: patch |
Changed in linux (Ubuntu): | |
status: | Incomplete → Confirmed |
Changed in linux-lts-xenial (Ubuntu): | |
status: | Incomplete → Confirmed |
Changed in linux: | |
importance: | Unknown → Medium |
status: | Unknown → Incomplete |
tags: | added: cscc |
Status changed to 'Confirmed' because the bug affects multiple users.