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Message #89341
[Bug 1390902] Re: [Z77 Extreme4] scaling_min_freq wrong on my Intel CPU
ahb, given the new information you provided, please ignore the request
to file this upstream. For now, let this be assigned to the cpufreqd
package for the specialist on that to review.
As well, would you be able to provide more information on your use of
cpufreqd (was it installed by default, did you configure it in any way,
etc.).
** Description changed:
- On Ubuntu:
- > lsb_release -a
- No LSB modules are available.
- Distributor ID: Ubuntu
- Description: Ubuntu 14.04.1 LTS
- Release: 14.04
- Codename: trusty
-
- > uname -a
- Linux desk 3.13.0-39-generic #66-Ubuntu SMP Tue Oct 28 13:30:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
-
- on all my Intel Core i5 or i7 systems (desktop and laptop) CPU scaling does not work out of the box:
- > cpufreq-info
+ With my Intel CPU scaling does not work out of the box. The problem is that although the hardware limits are correctly detected only the "range" between 3.50 and 3.50 GHz is used:
+ cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@xxxxxxxxxxxxxxx, please.
analyzing CPU 0:
- driver: 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: 10.0 us.
- hardware limits: 1.60 GHz - 3.50 GHz
- available frequency steps: 3.50 GHz, 3.50 GHz, 3.40 GHz, 3.20 GHz, 3.10 GHz, 3.00 GHz, 2.80 GHz, 2.70 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.70 GHz, 1.60 GHz
- available cpufreq governors: conservative, ondemand, userspace, powersave, performance
- current policy: frequency should be within 3.50 GHz and 3.50 GHz.
- The governor "ondemand" may decide which speed to use
- within this range.
- current CPU frequency is 3.50 GHz.
- cpufreq stats: ...
+ driver: 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: 10.0 us.
+ hardware limits: 1.60 GHz - 3.50 GHz
+ available frequency steps: 3.50 GHz, 3.50 GHz, 3.40 GHz, 3.20 GHz, 3.10 GHz, 3.00 GHz, 2.80 GHz, 2.70 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.70 GHz, 1.60 GHz
+ available cpufreq governors: conservative, ondemand, userspace, powersave, performance
+ current policy: frequency should be within 3.50 GHz and 3.50 GHz.
+ The governor "ondemand" may decide which speed to use
+ within this range.
+ current CPU frequency is 3.50 GHz.
+ cpufreq stats: ...
- The problem is that although the hardware limits are correctly detected
- only the "range" between 3.50 and 3.50 GHz is used.
+ WORKAROUND: Uninstall package cpufreqd.
- A workaround that works on all of my systems is:
- > cat cpufreq_workaround.sh
+ WORKAROUND: cat cpufreq_workaround.sh
#!/bin/sh
min_freq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies | awk "{ print \$NF }")
echo "Setting scaling_min_freq to $min_freq"
for i in `seq 0 7`; do echo $min_freq > /sys/devices/system/cpu/cpu$i/cpufreq/scaling_min_freq; done
afterwards:
> cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@xxxxxxxxxxxxxxx, please.
analyzing CPU 0:
- driver: 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: 10.0 us.
- hardware limits: 1.60 GHz - 3.50 GHz
- available frequency steps: 3.50 GHz, 3.50 GHz, 3.40 GHz, 3.20 GHz, 3.10 GHz, 3.00 GHz, 2.80 GHz, 2.70 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.70 GHz, 1.60 GHz
- available cpufreq governors: conservative, ondemand, userspace, powersave, performance
- current policy: frequency should be within 1.60 GHz and 3.50 GHz.
- The governor "ondemand" may decide which speed to use
- within this range.
- current CPU frequency is 1.60 GHz.
+ driver: 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: 10.0 us.
+ hardware limits: 1.60 GHz - 3.50 GHz
+ available frequency steps: 3.50 GHz, 3.50 GHz, 3.40 GHz, 3.20 GHz, 3.10 GHz, 3.00 GHz, 2.80 GHz, 2.70 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.70 GHz, 1.60 GHz
+ available cpufreq governors: conservative, ondemand, userspace, powersave, performance
+ current policy: frequency should be within 1.60 GHz and 3.50 GHz.
+ The governor "ondemand" may decide which speed to use
+ within this range.
+ current CPU frequency is 1.60 GHz.
...
-
- This issue persisted over all dist-upgrades since installing Ubuntu
- 14.04.1.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-39-generic 3.13.0-39.66
ProcVersionSignature: Ubuntu 3.13.0-39.66-generic 3.13.11.8
Uname: Linux 3.13.0-39-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC1: ahb 3853 F.... pulseaudio
- /dev/snd/controlC0: ahb 3853 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC1: ahb 3853 F.... pulseaudio
+ /dev/snd/controlC0: ahb 3853 F.... pulseaudio
Date: Sun Nov 9 13:54:23 2014
HibernationDevice: RESUME=UUID=1968620e-56f2-4ec6-b4ae-d2c601e8caa5
InstallationDate: Installed on 2014-08-28 (72 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
IwConfig:
- eth0 no wireless extensions.
-
- eth1 no wireless extensions.
-
- lo no wireless extensions.
+ eth0 no wireless extensions.
+
+ eth1 no wireless extensions.
+
+ lo no wireless extensions.
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcFB:
- 0 VESA VGA
- 1 inteldrmfb
+ 0 VESA VGA
+ 1 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-39-generic root=UUID=98ea3432-7344-4034-8652-46e5edf53f5b ro quiet splash vt.handoff=7
RelatedPackageVersions:
- linux-restricted-modules-3.13.0-39-generic N/A
- linux-backports-modules-3.13.0-39-generic N/A
- linux-firmware 1.127.8
+ linux-restricted-modules-3.13.0-39-generic N/A
+ linux-backports-modules-3.13.0-39-generic N/A
+ linux-firmware 1.127.8
RfKill:
-
+
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/14/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.40
dmi.board.name: Z77 Extreme4
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.40:bd05/14/2012:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ77Extreme4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
** Package changed: linux (Ubuntu) => cpufreqd (Ubuntu)
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1390902
Title:
[Z77 Extreme4] scaling_min_freq wrong on my Intel CPU
Status in “cpufreqd” package in Ubuntu:
Triaged
Bug description:
With my Intel CPU scaling does not work out of the box. The problem is that although the hardware limits are correctly detected only the "range" between 3.50 and 3.50 GHz is used:
cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@xxxxxxxxxxxxxxx, please.
analyzing CPU 0:
driver: 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: 10.0 us.
hardware limits: 1.60 GHz - 3.50 GHz
available frequency steps: 3.50 GHz, 3.50 GHz, 3.40 GHz, 3.20 GHz, 3.10 GHz, 3.00 GHz, 2.80 GHz, 2.70 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.70 GHz, 1.60 GHz
available cpufreq governors: conservative, ondemand, userspace, powersave, performance
current policy: frequency should be within 3.50 GHz and 3.50 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 3.50 GHz.
cpufreq stats: ...
WORKAROUND: Uninstall package cpufreqd.
WORKAROUND: cat cpufreq_workaround.sh
#!/bin/sh
min_freq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies | awk "{ print \$NF }")
echo "Setting scaling_min_freq to $min_freq"
for i in `seq 0 7`; do echo $min_freq > /sys/devices/system/cpu/cpu$i/cpufreq/scaling_min_freq; done
afterwards:
> cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@xxxxxxxxxxxxxxx, please.
analyzing CPU 0:
driver: 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: 10.0 us.
hardware limits: 1.60 GHz - 3.50 GHz
available frequency steps: 3.50 GHz, 3.50 GHz, 3.40 GHz, 3.20 GHz, 3.10 GHz, 3.00 GHz, 2.80 GHz, 2.70 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.70 GHz, 1.60 GHz
available cpufreq governors: conservative, ondemand, userspace, powersave, performance
current policy: frequency should be within 1.60 GHz and 3.50 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1.60 GHz.
...
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-39-generic 3.13.0-39.66
ProcVersionSignature: Ubuntu 3.13.0-39.66-generic 3.13.11.8
Uname: Linux 3.13.0-39-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ahb 3853 F.... pulseaudio
/dev/snd/controlC0: ahb 3853 F.... pulseaudio
Date: Sun Nov 9 13:54:23 2014
HibernationDevice: RESUME=UUID=1968620e-56f2-4ec6-b4ae-d2c601e8caa5
InstallationDate: Installed on 2014-08-28 (72 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
IwConfig:
eth0 no wireless extensions.
eth1 no wireless extensions.
lo no wireless extensions.
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcFB:
0 VESA VGA
1 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-39-generic root=UUID=98ea3432-7344-4034-8652-46e5edf53f5b ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-39-generic N/A
linux-backports-modules-3.13.0-39-generic N/A
linux-firmware 1.127.8
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/14/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.40
dmi.board.name: Z77 Extreme4
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.40:bd05/14/2012:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ77Extreme4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
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References
