Recently upgraded from f40 to f41 and now suffering screen corruption. Seen a few other posts on this that are solved by adding amdgpu.dcdebugmask=0x10 kernel parameter, but this has not solved the issue for me. Only a reboot resolves it (temporarily).
Right now I’m a bit stuck between either regular reboots or rolling back to f40 which is soon to be EOL.
Are there any other kernel tweaks that might solve it?
Lenovo thinkpad x13 gen4 AMD Ryzen 7 PRO 7840U w/ Radeon 780M Graphics
F42 was just released so at this point it might help to upgrade to that. The F41 period saw most of the AMD APU regressions, there have been a number of improvements since – although a few issues still linger.
If you do want to experiment first with F41, two other parameters you can try are:
amdgpu.dcdebugmask=0x200
amdgpu.dcdebugmask=0x600
You don’t have to mix them, you can try one at a time and test if it improves the situation.
Another option is to disable GPU hardware acceleration in your webbrowser, which is often the place where most of the issues are triggered since there is a lot of accelerating happening. This would slightly deteriorate the graphical performance in the browser but not by much since your CPU is quite capable to take over.
F42 would still be the best way forward probably.
Now you mention it, it’s usually while using FF that the issue first occurs. Let me try disabling acceleration as a quick fix.
I’m fairly conservative on upgrades (this is my daily driver) so it’s a bit early for me to jump on the f42 train. Hopefully disabling the acceleration will buy me some time for f42 to soak and then I’ll look to upgrade in a couple of months or so. 
Thanks
Early days but so far mesa-25.0.4 appears to have fixed the problem for me.