Found how to solve this problem:
Add radeon.si_support=0 amdgpu.si_support=1 radeon.cik_support=0 amdgpu.cik_support=1 to GRUB_CMDLINE_LINUX in /etc/default/grub. Do it via the command line with a text editor such as Nano or Vim.
Found how to solve this problem:
Add radeon.si_support=0 amdgpu.si_support=1 radeon. cik_support= 0 amdgpu. cik_support= 1 to GRUB_CMDLINE_LINUX in /etc/default/grub. Do it via the command line with a text editor such as Nano or Vim.