Changed motherboard and processor from AMD to intel: Debian blank desktop after login

missing non-free firmware. graphics require the “firmware-misc-nonfree” package, should also install “intel-microcode”
login to other working desktop envirement / windows manger

to the GRUB kernel boot command. If so, then log in and run

apt-cache policy firmware-misc-nonfree intel-microcode
  1. Open the terminal app
  2. Debian/Ubuntu Linux user type: sudo apt install intel-microcode
  3. CentOS/RHEL Linux user type: sudo yum install microcode_ctl

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