Cpupower - can set performance and powersave governors only

Question

Hi,
I got a HP compaq nx6110 laptop (I know, it's old and slow but it fits my needs for a laptop and it was free ). To increase the time on battery I installed laptop-mode-tools and cpupower. The laptop-mode-tools does what it should but cpupower doesn't set the governors correct.
After modprobing p4_clockmod I can make use of cpupower to get infos:
[root@Laptop wudu]# cpupower frequency-info
analyzing CPU 0:
driver: p4-clockmod
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.00 ms.
hardware limits: 175 MHz - 1.40 GHz
available frequency steps: 175 MHz, 350 MHz, 525 MHz, 700 MHz, 875 MHz, 1.05 GHz, 1.23 GHz, 1.40 GHz
available cpufreq governors: ondemand, performance
current policy: frequency should be within 175 MHz and 1.40 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 1.40 GHz (asserted by call to hardware).
boost state support:
Supported: no
Active: no
But I can't set the governor to ondemand:
[root@Laptop wudu]# cpupower frequency-set -g ondemand
Setting cpu: 0
[root@Laptop wudu]# cpupower frequency-info
analyzing CPU 0:
driver: p4-clockmod
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.00 ms.
hardware limits: 175 MHz - 1.40 GHz
available frequency steps: 175 MHz, 350 MHz, 525 MHz, 700 MHz, 875 MHz, 1.05 GHz, 1.23 GHz, 1.40 GHz
available cpufreq governors: ondemand, performance
current policy: frequency should be within 175 MHz and 1.40 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 1.40 GHz (asserted by call to hardware).
boost state support:
Supported: no
Active: no
After modprobing cpufreq_conservative and cpufreq_powersave cpupower tells me that these governors are available now:
[root@Laptop wudu]# modprobe cpufreq_conservative
[root@Laptop wudu]# modprobe cpufreq_powersave
[root@Laptop wudu]# cpupower frequency-info
analyzing CPU 0:
driver: p4-clockmod
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.00 ms.
hardware limits: 175 MHz - 1.40 GHz
available frequency steps: 175 MHz, 350 MHz, 525 MHz, 700 MHz, 875 MHz, 1.05 GHz, 1.23 GHz, 1.40 GHz
available cpufreq governors: powersave, conservative, ondemand, performance
current policy: frequency should be within 175 MHz and 1.40 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 1.40 GHz (asserted by call to hardware).
boost state support:
Supported: no
Active: no
So I'm trying them:
[root@Laptop wudu]# cpupower frequency-set -g conservative
Setting cpu: 0
[root@Laptop wudu]# cpupower frequency-info
analyzing CPU 0:
driver: p4-clockmod
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.00 ms.
hardware limits: 175 MHz - 1.40 GHz
available frequency steps: 175 MHz, 350 MHz, 525 MHz, 700 MHz, 875 MHz, 1.05 GHz, 1.23 GHz, 1.40 GHz
available cpufreq governors: powersave, conservative, ondemand, performance
current policy: frequency should be within 175 MHz and 1.40 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 1.40 GHz (asserted by call to hardware).
boost state support:
Supported: no
Active: no
[root@Laptop wudu]# cpupower frequency-set -g powersave
Setting cpu: 0
[root@Laptop wudu]# cpupower frequency-info
analyzing CPU 0:
driver: p4-clockmod
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.00 ms.
hardware limits: 175 MHz - 1.40 GHz
available frequency steps: 175 MHz, 350 MHz, 525 MHz, 700 MHz, 875 MHz, 1.05 GHz, 1.23 GHz, 1.40 GHz
available cpufreq governors: powersave, conservative, ondemand, performance
current policy: frequency should be within 175 MHz and 1.40 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 175 MHz (asserted by call to hardware).
boost state support:
Supported: no
Active: no
As you can see cpupower can just set performance and powersave. I want to use ondemand when on battery because the laptop is already slow in performance mode but nearly unusable when in powersave mode (175MHz).
BTW I can set to all speeds listed manually. Showing you with 875MHz as example:
[root@Laptop wudu]# cpupower frequency-set -u 875000
Setting cpu: 0
[root@Laptop wudu]# cpupower frequency-info
analyzing CPU 0:
driver: p4-clockmod
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.00 ms.
hardware limits: 175 MHz - 1.40 GHz
available frequency steps: 175 MHz, 350 MHz, 525 MHz, 700 MHz, 875 MHz, 1.05 GHz, 1.23 GHz, 1.40 GHz
available cpufreq governors: powersave, conservative, ondemand, performance
current policy: frequency should be within 175 MHz and 875 MHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 875 MHz (asserted by call to hardware).
boost state support:
Supported: no
Active: no
Hope some one has an idea...
Thanks in advance.

Answer 1

It's an Intel Celeron CPU and according to https://wiki.archlinux.org/index.php/CP … ncy_driver p4_clockmod is correct.
Trying to modprobe acpi-cpufreq gives me that:
[root@Laptop wudu]# modprobe acpi-cpufreq
modprobe: ERROR: could not insert 'acpi_cpufreq': No such device
And p4_clockmod puts speedstep-lib in as well:
[root@Laptop wudu]# lsmod | grep p4
p4_clockmod 3201 0
speedstep_lib 5136 1 p4_clockmod
With speedstep-lib loaded without p4_clockmod I can't use cpupower:
[root@Laptop wudu]# rmmod p4_clockmod
[root@Laptop wudu]# lsmod | grep p4
[root@Laptop wudu]# lsmod | grep speed
speedstep_lib 5136 0
[root@Laptop wudu]# cpupower frequency-info
analyzing CPU 0:
no or unknown cpufreq driver is active on this CPU
boost state support:
Supported: no
Active: no