error radeon kernel modesetting for R600 or later
Installing Debian 10 on Acer Aspire 5738PG-6773 you get this message in first rebooting: [drm: radeon_pci_probe [radeon]] *Error* radeon kernel modesetting for R600 or later requires firmware installed (you review messages using journalctl -xb command at terminal). This issue is about ATI radeon graphics. If your laptop has Internet connection, you win: sudo apt install firmware-linux-nonfree fix it. source: https://wiki.debian.org/Firmware