I upgraded to Ubuntu 17.10 on a laptop whose screen is broken. The only way I can see what's going on is by plugging an external monitor.
The problem is that after the upgrade, plugging the external screen extends the desktop, but I can't see what's going on the main screen. So impossible to log-in, and configure the displays to only use the external monitor.
Is there any way I can, from the command-line, force the UI to either exactly mirror the two screens, or disable the main laptop screen?
Thanks, Sami
xrandr
with--same-as
switch likexrandr --output DVI-I-1 --same-as DVI-I-2
where you would replace theDVI-I-
with your own ports that are connected.