Ubuntu randomly started blinking the screen on boot
Uninstall the Windows driver that allows you to read/write to Ubuntu EXT4 partitions.
To check the file system on your Ubuntu partition...
- boot to the GRUB menu
- choose Advanced Options
- choose Recovery mode
- choose Root access
- at the # prompt, type
sudo fsck -f / - repeat the fsck command if there were errors
- type
reboot
Update #1:
- boot to the GRUB menu
- select Ubuntu
- hit the e key
- use arrow keys to move
- find the line that has "quiet splash"
- add
nomodeset, so "quiet splash nomodeset" - hit F10 to exit and continue boot
- see if it flickers
I recently had the blinking screen on a dual boot Ubuntu 18 and Windows 10 machine and the boot sequence seemed to be stuck. When I tried CTRL+ALT+DEL a message was displayed that unattended updates was in progress. At some point the blinking stopped and a finished message appeared. The machine rebooted, and everything was normal after that.