I think your amd card is not supported anymore in kernel 5.11.xx (i might be wrong). I would suggest to try kernel 5.8 or 5.4.
I also found this but i dont really think it will help.
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I think your amd card is not supported anymore in kernel 5.11.xx (i might be wrong). I would suggest to try kernel 5.8 or 5.4.
I also found this but i dont really think it will help.