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FanControl not accessing GPU temperatures when running as a service

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Assessment

Difficulty
4/5
Estimated time
1-2 days
Newbie friendliness
42/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Domain
backend

Research direction

Start by comparing how GPU temperature sensors are accessed when FanControl runs as an application and as a service, using the Radeon RX 7700XT report as a reproduction case. Check whether GPU, Hotspot, and Memory readings remain available to fan curves in service mode, and identify the cause of the difference. Done means GPU temperature changes affect the configured case fans while the service is running.

Written by the indexing model from the issue text.

Description

I have been trying to use the max function to create curves for my case fans that will respond to both increases in CPU temp and GPU temp. This works fine when I have FanControl actually open and running as an application, but when I restart (after saving the config), FanControl no longer responds to changes in GPU temperatures. While the app is open, I can run a GPU stress test and hear the case fans ramp up, and I can run a CPU stress test and also hear the case fans ramp up, exactly as I wanted. When FanControl is running as a service, I can run a CPU stress test and hear the case fans ramp up, but when I run a GPU stress test, they do not change their speed. I have FanControl set to start service on boot, and toggling the start app on user log on and start minimized does not solve this problem. Opening fancontrol after I boot and then closing it and keeping it running as a service also does not fix this problem. I can only get it to properly work when I have fancontrol actually open as an app, and not running in the background. This occurs for all of my GPU sensors (GPU, Hotspot, Memory).

I'm using a Radeon RX 7700XT. I don't have another GPU to test this with, so it may be specific to my GPU. I have the latest drivers installed.

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