[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1035050
Title:
Unable to set scaling frequency on cpu with Precise server
Status in “linux” package in Ubuntu:
Expired
Bug description:
I noticed this on a machine I won't have access to any longer after
filing this :( but I'm fairly sure this is not specific to this
machine.
While testing, the cpu frequency scaling tests failed. Looking a bit
into what's going in, the problem is that the test is unable to set
the scaling frequency in sysfs. I did some digging and in some cases
this is due to the governor being used at the time. The userspace
governor has to be A: supported by the kernel and B: in use before you
can do anything with scaling_setfrequency.
So here's what I see:
leo@ubuntu:/sys/devices/system/cpu/cpu0/cpufreq$ cat scaling_governor
userspace
leo@ubuntu:/sys/devices/system/cpu/cpu0/cpufreq$ cat scaling_setspeed
1200000
leo@ubuntu:/sys/devices/system/cpu/cpu0/cpufreq$ cat scaling_cur_freq
1200000
leo@ubuntu:/sys/devices/system/cpu/cpu0/cpufreq$ cat scaling_driver
acpi-cpufreq
leo@ubuntu:/sys/devices/system/cpu/cpu0/cpufreq$ cat
scaling_available_frequencies
2601000 2600000 2500000 2400000 2300000 2200000 2100000 2000000 1900000
1800000 1700000 1600000 1500000 1400000 1300000 1200000
leo@ubuntu:/sys/devices/system/cpu/cpu0/cpufreq$ sudo echo 2600000 >
scaling_setspeed
-bash: scaling_setspeed: Permission denied
leo@ubuntu:/sys/devices/system/cpu/cpu0/cpufreq$ sudo echo "2600000" >
scaling_setspeed
-bash: scaling_setspeed: Permission denied
leo@ubuntu:/sys/devices/system/cpu/cpu0/cpufreq$ sudo echo "2600000" >>
scaling_setspeed
-bash: scaling_setspeed: Permission denied
leo@ubuntu:/sys/devices/system/cpu/cpu0/cpufreq$ sudo echo 2600000 >>
scaling_setspeed
-bash: scaling_setspeed: Permission denied
And in the kernel config:
leo@ubuntu:/sys/devices/system/cpu/cpu0/cpufreq$ grep -i userspace
/boot/config-3.2.0-23-generic
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
CONFIG_CPU_FREQ_GOV_USERSPACE=y
# CONFIG_DM_LOG_USERSPACE is not set
CONFIG_REGULATOR_USERSPACE_CONSUMER=m
CONFIG_DEVFREQ_GOV_USERSPACE=y
CONFIG_OCFS2_FS_USERSPACE_CLUSTER=m
# CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER is not set
So everything appears to be in place, but I just can't change the frequency...
---
AlsaDevices:
total 0
crw-rw---T 1 root audio 116, 1 Aug 8 15:09 seq
crw-rw---T 1 root audio 116, 33 Aug 8 15:09 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.0.1-0ubuntu5
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=e0b9d529-6f55-4fb6-b76d-d82b076ccc96
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64
(20120424.1)
IwConfig:
lo no wireless extensions.
eth1 no wireless extensions.
eth0 no wireless extensions.
MachineType: Quanta S210-X12RS
Package: linux (not installed)
PciMultimedia:
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic
root=UUID=c37eac21-f72f-44ad-b8e8-dd4945cc3582 ro
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
RelatedPackageVersions:
linux-restricted-modules-3.2.0-23-generic N/A
linux-backports-modules-3.2.0-23-generic N/A
linux-firmware 1.79
RfKill: Error: [Errno 2] No such file or directory
StagingDrivers: mei
Tags: precise staging
Uname: Linux 3.2.0-23-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
WifiSyslog:
dmi.bios.date: 07/05/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: S2RS3A15
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: S210-X12RS
dmi.board.vendor: Quanta
dmi.board.version: 31S2RMB0050
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 17
dmi.chassis.vendor: Quanta
dmi.chassis.version: To be filled by O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrS2RS3A15:bd07/05/2012:svnQuanta:pnS210-X12RS:pvrTobefilledbyO.E.M.:rvnQuanta:rnS210-X12RS:rvr31S2RMB0050:cvnQuanta:ct17:cvrTobefilledbyO.E.M.:
dmi.product.name: S210-X12RS
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Quanta
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