While installing Proxmox 5.x on some old servers, the installer seems to stop and show a black screen. after checking the installation-medium and retrying to install i noticed the monitor showing a ‘out of range/unsupported resolution’ just before the installation ‘hangs’
So, i inspected the grub config and noticed the splash screen was the culprit, and the fix is unbelievable simple.. just hit ‘Enter’ and wait a few seconds.
Proxmox installer seemed to stop at black screen.
the Splash-screen is displayed in a unsupported mode.
Wait untill the screen goes black, hit enter.