Arch Linux

J.

Member

Registered: 2011-01-31

Posts: 57

PHC not working

When I installed Arch (a month or so ago), I set up PHC using the wiki page and it was working fine, but now I've just noticed it's not working.  Conky wasn't reporting temperature properly for a while until I got around to fixing it, a couple of days ago, and I noticed it was higher than it should've been.  I checked for PHC files where the wiki page says to, and there are none:

[j@j-laptop ~]$ ls /sys/devices/system/cpu/cpu*/cpufreq/
/sys/devices/system/cpu/cpu0/cpufreq/:
affected_cpus               ondemand                       scaling_governor
bios_limit                  related_cpus                   scaling_max_freq
cpuinfo_cur_freq            scaling_available_frequencies  scaling_min_freq
cpuinfo_max_freq            scaling_available_governors    scaling_setspeed
cpuinfo_min_freq            scaling_cur_freq
cpuinfo_transition_latency  scaling_driver

/sys/devices/system/cpu/cpu1/cpufreq/:
affected_cpus               ondemand                       scaling_governor
bios_limit                  related_cpus                   scaling_max_freq
cpuinfo_cur_freq            scaling_available_frequencies  scaling_min_freq
cpuinfo_max_freq            scaling_available_governors    scaling_setspeed
cpuinfo_min_freq            scaling_cur_freq
cpuinfo_transition_latency  scaling_driver

phc-intel is still installed, and at the latest version (0.3.2-12).  I'm not sure when it stopped working, so it's hard to find updates in Pacman's log that might be related.  acpi-cpufreq is in rc.conf's MODULES array and it seems to be running.

[j@j-laptop ~]$ lsmod | grep cpufreq
cpufreq_ondemand        7480  2 
acpi_cpufreq            5101  1 
freq_table              2007  2 cpufreq_ondemand,acpi_cpufreq
processor              22529  3 acpi_cpufreq
mperf                    987  1 acpi_cpufreq

dmesg gives nothing.  Help?

litemotiv

Forum Fellow

Registered: 2008-08-01

Posts: 5,026

Re: PHC not working

Did you reinstall the package after upgrading the kernel?

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J.

Member

Registered: 2011-01-31

Posts: 57

Re: PHC not working

Huh, I didn't even notice the kernel upgrade; that is around the time it would've happened, yes.  And, while I think it's strange reinstalling the same package again makes a difference, that has fixed it, so thank you very much.  I guess the filesystem tree makepkg produces depends on the installed kernel?

stqn

Member

Registered: 2010-03-19

Posts: 1,191

Website

Re: PHC not working

I don't know for sure but my guess would be that PHC's installation actually replaces the acpi-cpufreq module.

Edit: this is wrong, see ROOKIE's answer below .

Last edited by stqn (2011-02-07 16:42:12)

ngoonee

Forum Fellow

From: Between Thailand and Singapore

Registered: 2009-03-17

Posts: 7,358

Re: PHC not working

Huh, I didn't even notice the kernel upgrade; that is around the time it would've happened, yes.  And, while I think it's strange reinstalling the same package again makes a difference, that has fixed it, so thank you very much.  I guess the filesystem tree makepkg produces depends on the installed kernel?

Check the PKGBUILD, it clearly references the currently running kernel.

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jasonwryan-Installing Arch is a measure of your literacy. Maintaining Arch is a measure of your diligence. Contributing to Arch is a measure of your competence.
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R00KIE

Forum Fellow

From: Between a computer and a chair

Registered: 2008-09-14

Posts: 4,734

Re: PHC not working

I don't know for sure but my guess would be that PHC's installation actually replaces the acpi-cpufreq module.

Nope, it just adds a .conf file to /etc/modprobe.d which will load phc instead of acpi-cpufreq/powernow_k8/whatever, much like what is done to load ehci_hcd before loading ohci_hcd when trying to load ohci_hcd.

However like ngoonee says, the module needs to be rebuilt for every kernel update.

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R00KIE
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litemotiv

Forum Fellow

Registered: 2008-08-01

Posts: 5,026

Re: PHC not working

Huh, I didn't even notice the kernel upgrade; that is around the time it would've happened, yes.  And, while I think it's strange reinstalling the same package again makes a difference, that has fixed it, so thank you very much.  I guess the filesystem tree makepkg produces depends on the installed kernel?

Please mark your thread solved J.

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