Comment 27 for bug 1808183

I've just done a clean install of 18.04 and have the same issue where running 18.04 off a boot usb stick works flawlessly, however after installing on the hard drive the login screen is very laggy and once I enter my password the screen resolution is all messed up and unreadable.

If I reboot and hold down shift to get the Grub menu and choose Advanced then recovery mode and then without altering anything I choose resume from the recovery menu and the login screen works perfectly.

So I assume the fix hasn't been rolled out yet as I've run the updater and there's nothing that needs updating on my system.