[ltp] Who's playing with scaling_max_freq?
Henrique de Moraes Holschuh
Thu, 28 Apr 2016 08:18:41 -0300
On Tue, Apr 26, 2016, at 22:23, Stefan Monnier wrote:
> Max scaling_max_freq seems stuck at 1GHz even though it should be able
> to go up to 1.83GHz.
> # echo 1833000
> >/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq; cat
> # cat
> 1833000 1333000 1000000
> This is on a Thinkpad T60 running Debian stable. Any idea what might be
Works on a Debian stable T43/p on kernels 3.18 and 4.4. I don't recall
if I ever used Debian's 3.14 kernel in there, though.
Check dmesg (kernel log), pay close attention to everything ACPI. Check
thermal limits. Check termal sensors, your thinkpad has a truckload of
Your thinkpad might be in need of a thermal sink reseat (and if you do
that, have "Arctic Silver 5" or something equally good and
*non-conductive, non-reactive* on hand to replace the CPU thermal
> causing this? Or at least, which part of the system might cause
> scaling_max_freq to be (re)set to 1GHz right after I force-set it to
> Would it be some daemon like systemd or rather the kernel?
thermald might do it, but we don't install that thing by default in
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