Arch Linux

Brayden.Dean

Member

Registered: 2015-09-18

Posts: 6

[SOLVED] LightDM displays on wrong monitors

I have 3 monitors. Let's just call them

|1|| 2 || 3 |.

When LightDM loads, if I move my cursor left from 2, it goes to 3. If I keep going left, it ends up at 1. It sees it as

|1|| 3 || 2 |.

It is set up properly in GNOME, and I can't figure out how to force the order of the monitors. I have tired using xrandr as the Arch Wiki suggested, but that only works on the webkit greeter, while I'm using the GTK greeter.

I used the wiki to set up xorg.conf, which currently becomes

Section "Monitor"
Identifier  "DVI-I-0"
Option      "PreferredMode" "1280x1024"
Option      "Position" "0 0"
EndSection

Section "Monitor"
Identifier  "DVI-D-0"
Option      "PreferredMode" "1920x1080"
Option      "Position" "1280 0"
EndSection

Section "Monitor"
Identifier  "HDMI-0"
Option      "PreferredMode" "1920x1080"
Option      "Position" "3200 0"
EndSection

Which *should* put DVI-I-0 on the far left, DVI-D-0 in the middle, and HDMI-0 on the far right. However, in LightDM, they show up as DVI-I on the left, HDMI in the middle, and DVI-D on the right.

Last edited by Brayden.Dean (2015-09-22 05:31:06)

Brayden.Dean

Member

Registered: 2015-09-18

Posts: 6

Re: [SOLVED] LightDM displays on wrong monitors

bump

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,721

Re: [SOLVED] LightDM displays on wrong monitors

https://wiki.archlinux.org/index.php/Fo … te#Bumping

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Brayden.Dean

Member

Registered: 2015-09-18

Posts: 6

Re: [SOLVED] LightDM displays on wrong monitors

My bad. Most forums allow bumping after 24 hours, I assumed this was the same.

Tutti

Member

Registered: 2015-02-26

Posts: 117

Re: [SOLVED] LightDM displays on wrong monitors

You could try create a script using xrandr to set up the screens, and add that script to 'display-setup-script' or 'greeter-setup-script' in lightdm.conf

Brayden.Dean

Member

Registered: 2015-09-18

Posts: 6

Re: [SOLVED] LightDM displays on wrong monitors

I thought of this after I discovered xrandr could not just set primary displays, but also set up display location. I ended up with

xrandr --output DVI-D-0 --auto --primary --output DVI-I-0 --auto --left-of DVI-D-0 --output HDMI-0 --auto --right-of DVI-D-0

which works now. Thanks for the suggestion!

Last edited by Brayden.Dean (2015-09-22 05:30:52)