Arch Linux

sonic257

Member

Registered: 2022-10-01

Posts: 3

[SOLVED] External monitor not recognized on laptop (kde plasma).

I have just started using arch and am new to linux in general. I got kde plasma working but it doesn't seem to be recognizing my second monitor, which is connected to my laptop via hdmi. Here is the output of

xrandr -q

Screen 0: minimum 16 x 16, current 1920 x 1080, maximum 32767 x 32767
XWAYLAND0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 340mm x 190mm
   1920x1080     59.96*+
   1440x1080     59.99
   1400x1050     59.98
   1280x1024     59.89
   1280x960      59.94
   1152x864      59.96
   1024x768      59.92
   800x600       59.86
   640x480       59.38
   320x240       59.52
   1680x1050     59.95
   1440x900      59.89
   1280x800      59.81
   720x480       59.71
   640x400       59.95
   320x200       58.96
   1600x900      59.95
   1368x768      59.88
   1280x720      59.86
   1024x576      59.90
   864x486       59.92
   720x400       59.55
   640x350       59.77

it doesnt say disconnected or anything, it just doesnt recognize the external monitor. same case when I look in display configuration.

Any ideas?

EDIT:

issue has been resolved. first i switched to x11 instead of wayland, but then only my external monitor worked, so i rebooted and logged into plasma x11 and it worked.

Last edited by sonic257 (2022-10-01 19:17:11)

Stratoblaster

Member

From: Florida

Registered: 2018-12-04

Posts: 59

Re: [SOLVED] External monitor not recognized on laptop (kde plasma).

Just curious, what does arandr show you?
Im also curious what Wayland buys you in your instance that Xorg does not? 
Are you using Wayland simply because its a buzz word or is there a specific need?

Last edited by Stratoblaster (2022-10-01 17:59:12)

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Supercalifragilisticexpialidocious

sonic257

Member

Registered: 2022-10-01

Posts: 3

Re: [SOLVED] External monitor not recognized on laptop (kde plasma).

Just curious, what does arandr show you?

(arandr:11915): Gdk-CRITICAL **: 14:01:54.656: gdk_atom_intern: assertion 'atom_name != NULL' failed

(arandr:11915): Gdk-CRITICAL **: 14:01:54.656: gdk_atom_intern: assertion 'atom_name != NULL' failed

it also opens a screen layout manager which also doesnt recognize my external monitor

I am using wayland because i was instructed to on the website i was following to install kde plasma. if i can resolve the issue with xorg i will gladly switch it. how would i do that?

Last edited by sonic257 (2022-10-01 18:09:14)

sonic257

Member

Registered: 2022-10-01

Posts: 3

Re: [SOLVED] External monitor not recognized on laptop (kde plasma).

Just curious, what does arandr show you?
Im also curious what Wayland buys you in your instance that Xorg does not? 
Are you using Wayland simply because its a buzz word or is there a specific need?

i have switched to X11 and now my external monitor is working, but my laptop screen just says

Starting version 251.4-1-arch

and my xrandr -q output is

Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 298mm
   1920x1080     60.00*+  59.94    50.00    23.98
   1440x900     119.85
   1280x1024     75.02
   1280x720      60.00    59.94    50.00
   1024x768     119.99   100.00    75.03    60.00
   800x600      119.97   100.00    75.00    60.32
   720x576       50.00
   720x480       59.94
   640x480      120.01    99.99    75.00    59.94    59.93
DP-0 disconnected (normal left inverted right x axis y axis)

seth

Member

Registered: 2012-09-03

Posts: 51,253

Re: [SOLVED] External monitor not recognized on laptop (kde plasma).

Please post your xorg log, https://wiki.archlinux.org/title/Xorg#General
Since this is most likely an optimus system, see https://wiki.archlinux.org/title/NVIDIA_Optimus and esp. https://wiki.archlinux.org/title/PRIME#Reverse_PRIME

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