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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - FAN speed is too high when displays are off"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101653#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - FAN speed is too high when displays are off"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101653">bug 101653</a>
from <span class="vcard"><a class="email" href="mailto:alexander@tsoy.me" title="Alexander Tsoy <alexander@tsoy.me>"> <span class="fn">Alexander Tsoy</span></a>
</span></b>
<pre>smu7_get_xclk() returns some crazy values when display is off. And this value
depends on some state that changes every boot.
$ sudo journalctl -b -1 -o cat | grep reference_clock | sort | uniq -c
4 amdgpu: reference_clock = 232169472, tmp = 0
5 amdgpu: reference_clock = 2700, tmp = 0
$ sudo journalctl -b -o cat | grep reference_clock | sort | uniq -c
16 amdgpu: reference_clock = 1305214976, tmp = 0
12 amdgpu: reference_clock = 2700, tmp = 0
So now after reboot I get a different FAN speed when display is off:
$ cat /sys/class/hwmon/hwmon6/fan1_input
1057
When display is on, FAN speed is always consistent.
$ cat /sys/class/hwmon/hwmon6/fan1_input
937</pre>
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