(In reply to Konstantin Pereiaslov from comment #187)
> As recommended here I added AMD_DEBUG="nongg,nodma" to /etc/environment and
> additionally added export AMD_DEBUG="nongg,nodma" to ~/.profile just to be
> sure and for 5 days since that I only had one system freeze and it had a
> different journalctl message, so it did help me help with sdma0 timeout
> issue!

Thank you very much. I was afraid to try this since someone mentioned
performance drops but I haven't noticed any in applications I use.