Ubuntu 20.4.6 LTS Nvidia legacy 340 driver and external monitor

[Richmond]

Liam Proven wrote:
> On Sat, 24 Aug 2024 at 20:21, Richmond via ubuntu-users
> <ubuntu-users at lists.ubuntu.com> wrote:
>> when gdm3 starts up the graphics card is reset to its default
>> settings, which are not quite right. I tried to change these settings in
>> the gnome preferences - displays, but it doesn't quite work the same and
>> sets the virtual screen bigger than the screen.
> Are you using GNOME on Wayland or on X.org?
>
> Settings in `/etc/X11/xorg.conf` won't affect Wayland.
>
>
I would ask how to tell, but if xorg.conf doesn't affect Wayland, then I
must be using xorg, because it clearly works until gdm or gnome resets
the card.

I think on Debian there was an option on the login screen to choose
between Wayland and Xorg, but I don't see that with Ubuntu.