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I want to regulate CPU voltages and I can't find any way do do so on Linux (on Windows I use ThrottleStop).
The only thing I've found is intel-phc: https://wiki.archlinux.org/index.php/PHC
But it works only with acpi-cpufreq and not intel_pstate, since Linux 4.7 came out intel_psate performances degraded and the new schedutils is doing greate.
1) How do I use phc?
2) Is the new scheduitl governor used with acpi-cpufreq?
3) If 2) is true, how do I use acpi-cpufreq?
I've done this but it's not working:
/etc/modules-load.d/acpi-cpufreq
# Load acpi-cpufreq at boot
acpi-cpufreq
But it doesn't load acpi-cpufreq at boot:
% lsmod | grep -i acpi :(
1 a
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The pstate power scaling driver is used automatically for modern Intel CPUs instead of the other drivers below. This driver takes priority over other drivers and is built-in as opposed to being a module. Add
intel_pstate=disable
to your kernel line to disable it and use acpi instead.
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I already have intel_pstate=disable in kernel line and phc-intel is being loaded:
% cpupower frequency-info
analisi della CPU 0:
driver: phc-intel
I can't disable this driver:
% cat /proc/cmdline
\vmlinuz-linux ro root=UUID=5e5ecd52-77a7-42c7-a997-0aef9d5cd654 ro quiet splash intel_pstate=disable phc_intel=disable phc-intel=disable initrd=\initramfs-linux.img
I'm following this guide: https://wiki.archlinux.org/index.php/PHC
'phc-intel setup' seems to be non-existent, so I've installed dkms-phc-intel.
wiki says it should load acpi-cpufreq module but it's not, so I'm stuck, running '$ dmesg | grep acpi-cpufreq' shows nothing (returns 1 in zsh)
Last edited by buntolo (2016-09-21 13:20:23)
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I think it means you are actually using phc, and if I understanded right, it's what you want. So, what's the problem?
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I think it means you are actually using phc, and if I understanded right, it's what you want. So, what's the problem?
According to that guide, acpi-cpufreq should be loaded but it's not, the mprime script doesn't work.
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See the 'Troubleshooting' part in PHC arch wiki page regarding module loading, and everything else.
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