Re: Activate additional monitor

[Van Snyder <van.snyder@sbcglobal.net>]

On Mon, 2025-07-21 at 14:58 -0600, Charles Curley wrote:

On Mon, 21 Jul 2025 12:35:48 -0700

Van Snyder <van.snyder@sbcglobal.net> wrote:

I have a desktop system with HDMI graphics on the motherboard and a

graphics card. Here's the output from inxi -G:

Device-1: Intel Raptor Lake-S GT1 [UHD Graphics 770] driver: i915 v:

kernel

Device-2: NVIDIA GM107GL [Quadro K2200] driver: nouveau v: kernel

It's running Debian 12.11 with kernel 6.1.140-1.

If I connect the HDMI monitor before boot, it works. If I connect the

HDMI monitor after the system is running, it doesn't work.

If you are running XFCE, take a look at the Display application

(Applications -> Settings -> Display). I expect other desktops have

something similar.

I use KDE. The Settings => Display and Monitor => Display Configuration page only shows the monitors that were active at boot, both of which are connected to the NVidia card.

If you don't mind doing a bit of scripting, look at arandr. It will let

you set up your monitors, then export a script. You can then select a

script to suit your setup. Or you can call an appropriate one from your

desktop/window manager's startup code.

xrandr --listmonitors lists only the monitors that were connected at boot.