[Bug 67982] After boot, the APU is powered with its maximum voltage (trinity/ARUBA)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67982

--- Comment #7 from Kertesz Laszlo <laszlo.kertesz at gmail.com> ---
With 3.12 rc3 and now rc4 kernels this bug seemso to be gone and replaced with
its opposite - the APU never reaches its maximum voltage (1.34) even under full
load (4 threads compiling) instead it stays at max 1.22v, thus torbo core is
never activated (maybe for a second at start?) and instead of sustained ~3.3
GHz i get with 1.34v i have something like this (max 2 cores are reported as
3.2GHz):

# cpufreq-aperf -o
CPU    Average freq(KHz)    Time in C0    Time in Cx    C0 percentage
000    3168000            00 sec 987 ms    00 sec 012 ms    98
001    3168000            00 sec 998 ms    00 sec 001 ms    99
002    3168000            00 sec 990 ms    00 sec 009 ms    99
003    3200000            00 sec 997 ms    00 sec 002 ms    99

Granted, the temperatures are lower too (never reaching over 50C), but for that
+5C difference i would rather have +200MHz sustained speed (and the initial
~3.5 GHz).
The idle voltages are modified, they go as low as 0.7V, they are constantly
changing between 0.9 and 0.72 or so. Before it was only 0.9.

Maybe this is a acpi-cpufreq issue?

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