Xlinder no I didn't give that command, I should try to do it and see what you say but apart from that, in my opinion the underlying problem is in the Kernel after version 5.6. I also tried to install Ubuntu, up to version 5.4 of the Kernel, with Ubuntu 20.0.4, the internal gpu mode works and with AMD Navi 10, I tried to enable the card by inserting the usual file in xorg.conf, as reported in the guide on wiki and that made me enable Navi 10 on Fedora, but the operating system at that point doesn't start anymore. In any case, before inserting this file on Xorg, I updated Ubuntu to the latest version or the 20.10 which has in Kernel 5.8 and coincidentally, even in AST mode and without enabling the Navi 10, the computer just after it loads the system, yes it crashes irreversibly and must be shut down manually, just like with kernels from 5.7 onwards on Fedora. So in my opinion there is an underlying problem of the Kernel from version 5.7 onwards on Power that goes into constant conflict with the Navi 10 and that no one has yet unearthed for our misfortune. It is not possible that all distros that exceed version 5.6 of the Kernel suddenly stop working! You have to work on this first thing, you have to eliminate this damn bug that causes conflict between the drivers of Navi 10 and the new files contained by the Kernel 5.7 onwards on Power! Now I want to try to disassemble the graphics card and start Ubuntu version 20.10, do you want to see that if I remove the graphics card it starts? We'll see...