fan control

[Yegr23]

Linux 6.7.4-200.fc39.x86_64 Fedora Linux 39 (Workstation Edition)
Radeon HD 7950/8950 OEM / R9 280
fan control doesn't work (no fan detected)

[ilya-zlobintsev]

Please include a debug snapshot.

[CaptainMorgan12]

Same here:
Environment: Ubuntu 23.10, Kernel 6.8.0-060800rc5-generic, LACT 0.5.2-release, Southern Islands (SI), TAHITI, AMD Radeon HD 7800 Series (RADV TAHITI), Vulkan 1.3.12, radv, Mesa 23.2.1-1ubuntu3.1

Fan control greyed out in Thermals tab:

Download and rename file changing .zip to .tar which isn't supported for github upload
LACT-sysfs-snapshot-20240224-143355.zip

I have corectrl installed and applied different fan profiles, and the fans are detected there, so not sure that could mess up what LACT does, I also have radeon-profile installed and the fans are detected there and can override the fan control.

The one thing that is a little odd is that is shows the radv driver, and while installed it isn't in use it is the AMDGPU driver:

02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti LE [Radeon HD 7870 XT]
	Subsystem: Apple Inc. FirePro D500
	Kernel driver in use: amdgpu
	Kernel modules: radeon, amdgpu
--
06:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti LE [Radeon HD 7870 XT]
	Subsystem: Apple Inc. FirePro D500
	Kernel driver in use: amdgpu
	Kernel modules: radeon, amdgpu

[ilya-zlobintsev]

It looks like Southern Islands (maybe some newer ones too?) doesn't report the fan speed in RPM, only the percentage value. Currently, LACT relies on the absolute RPM value.

one thing that is a little odd is that is shows the radv driver

That's normal, radv is the name of the vulkan driver, you can see under "hardware info" that the kernel driver is indeed amdgpu.

[ilya-zlobintsev]

Try the test build, it should work now.

[CaptainMorgan12]

The control now show and are editable. One item I notice is that if I edit and apply the controls for example static fan speed to 100% the fan does not adjust speed to the applied value. I restarted the daemon. Also it shows 100% speed, but fan speed is about 50%.

LACT-sysfs-snapshot-20240225-080525.tar.gz.zip

[ilya-zlobintsev]

According to the snapshot you provided, the GPU is indeed reading 100% fan speed. Do other tools behave differently?