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My laptop has a 4k display. When I plug in my thunderbolt 3 to display port adapter which connects to 3 1920x1200 displays over MST it fails to properly connect because it exceeds the maximum resolution permitted by my GPU.

A -hopeful- solution to this is disabling the built in display and then connecting to the external displays. However, I can't seem to pull it off properly through the display manager and it usually ends in me crashing things.

Summary:

Laptop -> Thunderbolt 3 to display port adapter -> 3 1920x1200 displays over MST/Daisy Chaining

I am seeking to disable the built-in display when external displays are detected and reenable it when external displays are unplugged.

enter image description here

  • It's always worked for me in the past through Display Properties. Plug in the monitor and turn it on, detect displays, tell it to turn the panel off, apply, accept. – Ignacio Vazquez-Abrams Nov 10 '17 at 22:23
  • Due to resolution constraints this does not work for me. I can only get two external displays working instead of all 3. – Alec Nov 10 '17 at 22:41
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    Don't post screenshots of textual output, paste the actual text... – jasonwryan Nov 10 '17 at 23:53
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    @jasonwryan I would argue that in this context that is insignificant. – Alec Nov 11 '17 at 2:12
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    @jasonwryan Furthermore: what's acceptable on a service is purely the rules, not opinion. I don't care about the meta, and I don't need to until I'm required to comply by it. I don't care about catering to someone's standard that isn't official. You don't define what's acceptable, maybe your reputation has brought you an ego. – Alec Nov 11 '17 at 13:22
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First, an xrandr --listmonitors shows the displays visible for your X.

For example, you will see these (I have a single-display, you will have multiple):

Monitors: 1
 0: +*DVI-0 1920/598x1080/336+0+0  DVI-0

Now if I would want to power off my DVI-0 display, I would issue an

xrandr --output DVI-0 --off

You can get a more detailed list of your display configuration with an xrandr -q.

The problem is, that it is a command line tool. Doing this automatically on display connect/disconnect is possible, but in the case of gnome+suse, I don't know, how.

Maybe you will get a more detailed answer for that - if your question wouldn't be closed until that.

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Check autorandr package. You create set ups and the tool switches between them automatically.

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