Got an mini-itx (ASUS AT5NM10-I) computer that had Windows I want to try Ubuntu on. As I don't have a monitor with VGA input I'm using a VGA > HDMI adapter. The way the adapter works makes it show up as two separate displays.
I am able to install without problems. Ubuntu starts and I can see the login screen etc fine. But when I log in the display gets jumpled and then starts to flicker before going black. If i restart after this it won't show the login screen anymore, just some Ubuntu background or something.
I've searched for solutions online but haven't found any solution so far. If I understand it correctly it seems xrandr for some reason can't find or set up the Monitor/adapter properly? All commands I've tried so far fail with "Can't open display"
Some of what I've found while looking for a solution seems to suggest I could add the monitor(s) manually, but I am unsure how to do this correctly.
While writing this I'm actually using Ubuntu but from the USB drive I used to install. For some reason the preview Ubuntu there has no issue with this. Is it possible to somehow copy the configuration from the USB Ubuntu over to the installed Ubuntu?
Using USB drive ubuntu:
ubuntu@ubuntu:~$ xrandr --listmonitors
0: +*LVDS1 1280/344x720/194+0+0 LVDS1
1: +VGA1 1280/530x720/300+0+0 VGA1