I have connected my laptop to an external monitor via a VGA cable and set up the system to use only the external one (Single Display setting) but I have some problems at the boot. When I boot the PC it switches from one monitor setting to another:
At first, while the BIOS loads, the native screen is the only one to be used (
Single Displayon native monitor)The screen asking for the cryptsetup is shown on both the monitors (
Mirror)The boot is shown on both the monitors (
Mirror)The login screen appears only on the native monitor while the external one shows a violet background (
Join Displays)When I log in the native screen is switched off and the external one is the only used (
Single Displayon the external monitor)
I suppose that until I have not logged in Ubuntu ignores my personal settings and uses some default ones, which is good for safety but causes me some trouble. Is there a way to change those default settings to be able to log in from the external monitor?
I have no idea about what information could be useful to solve the problem, please ask in the comments what is needed.
