https://bugzilla.kernel.org/show_bug.cgi?id=207183
Bug ID: 207183
Summary: radeon.dpm=1 with second monitor runs hot
Product: Drivers
Version: 2.5
Kernel Version: 5.3.18
Hardware: x86-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - non Intel)
Assignee: drivers_video-...@kernel-bugs.osdl.org
Reporter: ehu...@gmail.com
Regression: No
Created attachment 288315
--> https://bugzilla.kernel.org/attachment.cgi?id=288315&action=edit
dmesg | grep -iE "drm|radeon"
for a long time, I've been searching for the reason why my card was running
fans high on Linux. (It started after a kernel update; don't know which one --
years ago) While at the time, I ran Windows on the same laptop every now and
then, it would work correctly.
My card reports `lspci | grep VGA`:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Venus
XT [Radeon HD 8870M / R9 M270X/M370X]
Without radeon.dpm or with radeon.dpm=1, the card runs hot: within minutes fans
will run at 3300+ RPM keeping the card barely below 66 degC. Note that
`radeontop` reports an `Graphics pipe` of 0.00% most of the time.
After discovery of the setting radeon.dpm yesterday, after a few failed trials
to set the setting to '1', I set `radeon.dpm=0`. After letting the PC cool down
(turned off) and starting again, the PC ran 10 minutes without fans and is
running at 53 degC with fans running at 2100 RPM.
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