mrkapqa wrote:yes, and i upgraded to Devuan3.0 in the meantime,
so my question should be upgraded to
"what can i do on Debian Buster to improve the situation for the RX560 Graphics Card".
Devuan is not supported here and Debian buster is off-topic for this thread.
If you want to try Debian buster then please do so but only open a new thread after you have tried the non-free firmware.
mrkapqa wrote:the AMDGPU-PRO software won't install, am i right?
The AMDGPU-PRO driver is out-performed by the open-source version for almost all tasks, see the Phoronix website for more on this.