[Bug 101653] FAN speed is too high when displays are off

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Bug ID 101653
Summary FAN speed is too high when displays are off
Product DRI
Version unspecified
Hardware Other
OS All
Status NEW
Severity normal
Priority medium
Component DRM/AMDgpu
Assignee dri-devel@lists.freedesktop.org
Reporter alexander@tsoy.me

Created attachment 132364 [details]
kernel log

While investigating bug #101528, I've noticed another issue: FAN speed is too
high when display are off.

Display is off:
$ cat /sys/class/hwmon/hwmon6/fan1_input
1914

Display is on:
$ cat /sys/class/hwmon/hwmon6/fan1_input
941

In both cases sclk, mclk and pcie are in the same lowest state.


GPU:
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Tonga PRO [Radeon R9 285/380] [1002:6939] (rev f1) (prog-if 00 [VGA
controller])
        Subsystem: PC Partner Limited / Sapphire Technology Tonga PRO [Radeon
R9 285/380] [174b:e305]

kernel:
$ uname -r
4.11.7-gentoo


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