Input Not Supported Msg on LCD

INput Not supported msg on LCD. coming while login to linux server.

unable to find login screen and desktop.

CTRL+ALT+F1 to change GUI to TEXT MODE

CTRL + ALT + F7 to change TEXT MODE to GUI mode.

how to set login resolution to view login screen on linux machine.

login in single user mood (text mode)

root]#system-config-display --reconfig

the above command will open resolution windows (GUI MODE)

reset the resolution and save.

after that reboot linux machine.

Thanks