On win7 if cpu’s are not used frequency goes to 800MHz instead of 1.8GHz on my laptop (i7-2670QM)
On Opensuse 12.1 this is not so even agressive power save is selected…
I cannot set CPU clock to 800MHz even supported (in fact opensuse should do that for me…)
Module acpi_cpufreq is loaded
I cannot change with
cpufreq-set -f 800MHz
even scaling_governor is set to userspace (I have set it with echo userspace > /sys/devices/system/cpu/cpuX/cpufreq/scaling_governor)
nor with
cpufreq-set -c 0 -u 800MHz
There is no error message but cpufreq-info gives still 1.8GHz
Nobody has this issue?
The cpf util gives me a value of current cpu speed which is wrong.
CPU Speed: 800 GHz
but cpufreq-info and i7z_GUI gives 1.8-2.3GHz which is true …
I cannot lower the speed to 800GHz
Can you say what you get? I used SuSE Paste to post this image: SUSE Paste AND selected the Image option in the top right corner as it defaults to Code.
In your message, select the Insert Image option & copy the Download Link location (top right corner), after your image is posted in SuSE Paste.
Yes I have installed cfu. I set gobernador and frequency with
for i in 0 1 2 3 4 5 6 7;do cpufreq-set -g powersave -c $i;done
cpufreq-set -f 800MHz
and
for i in 0 1 2 3 4 5 6 7;do cpufreq-set -u 800MHz -c $i;done
cpu-info gives right limits but current cpu is still 1.8GHz not 800MHz
even limit are 800-800MHz. Here output of cpu-info of cpu7
analyzing CPU 7:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 0 1 2 3 4 5 6 7
CPUs which need to have their frequency coordinated by software: 7
maximum transition latency: 10.0 us.
hardware limits: 800 MHz - 2.20 GHz
available frequency steps: 2.20 GHz, 2.20 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz, 1.40 GHz, 1.30 GHz, 1.20 GHz, 1.10 GHz, 1000 MHz, 900 MHz, 800 MHz
available cpufreq governors: conservative, userspace, powersave, ondemand, performance
current policy: frequency should be within 800 MHz and 800 MHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 1.80 GHz (asserted by call to hardware).
i7z shows too that current cpu speed is 1.8GHz
cfu shows the following which is what i set but not what’s really used …
Yes I have installed cfu. I set gobernador and frequency with
for i in 0 1 2 3 4 5 6 7;do cpufreq-set -g powersave -c $i;done
cpufreq-set -f 800MHz
and
for i in 0 1 2 3 4 5 6 7;do cpufreq-set -u 800MHz -c $i;done
cpu-info gives right limits but current cpu is still 1.8GHz not 800MHz
even limit are 800-800MHz. Here output of cpu-info of cpu7
analyzing CPU 7:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 0 1 2 3 4 5 6 7
CPUs which need to have their frequency coordinated by software: 7
maximum transition latency: 10.0 us.
hardware limits: 800 MHz - 2.20 GHz
available frequency steps: 2.20 GHz, 2.20 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz, 1.40 GHz, 1.30 GHz, 1.20 GHz, 1.10 GHz, 1000 MHz, 900 MHz, 800 MHz
available cpufreq governors: conservative, userspace, powersave, ondemand, performance
current policy: frequency should be within 800 MHz and 800 MHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 1.80 GHz (asserted by call to hardware).
i7z shows too that current cpu speed is 1.8GHz
cfu shows the following which is what i set but not what’s really used …
In order to use the same speed, ie 800 MHZ all of the time, you must set the Governor to USERSPACE, not POWERSAVE as shown above else, the speed can be changed based on the Governor used. Change your selection to USERSPACE with a speed of 800 MHZ and then see what you get.
Thanks that did the job!! I used several comninations of max cpu frequ. etc. with differente governors
but because on os 11.4 it did work with powersave I thought this is the right way
Nevertheless my fan is still working to much but this seems to be an other problem…
Thanks again!!
Ok will read it, thanks.
What I have already tried was to set pcie_aspm=force as kernel boot args but this does not change anything …
sensors give my low tempratures
I have the exactly same problem with my Ubuntu 12.04!!! I thought I would never find someone having the same issue. How did you solve this problem? cpu-set made it right for you?
With kernel 3.4 this issue doesn’t happen and it’s not needed to put those boot options. You can set frequency to 800MHz without problems. I compiled, myself, the 3.4.3 kernel and proved it. If you do a cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq; cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq, you’ll see that both frequencies will be 800000 and not 1800000 and 800000 as it was before. You can use powertop or i7z to check it out too.
