Arch Linux

ls-alh

Member

Registered: 2024-07-22

Posts: 5

Only one monitor at a time; Plasma 6 / Wayland [ SOLVED ]

Attempting to use an external monitor alongside the built in display results in only one being recognized by the system at a time, but only in a plasma wayland session. Closing the laptop lid enables and sets the external monitor to the default. This does not happen in any other context I have tried: In SDDM both monitors are enabled simultaneously. On TTYs both monitors are mirrored. The monitor is connected over DisplayPort to Thunderbolt dock then to the laptop. The laptop is a Thinkpad x390 with no dedicated GPU. I have heard of this issue with NVIDIA powered laptops, but never with any else.

Last edited by ls-alh (2024-10-24 08:27:20)

seth

Member

Registered: 2012-09-03

Posts: 58,669

Re: Only one monitor at a time; Plasma 6 / Wayland [ SOLVED ]

qdbus org.kde.KWin /KWin supportInformation
kscreendoctor

Can you alter the output layout in systemsettings and enable both monitors?

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ls-alh

Member

Registered: 2024-07-22

Posts: 5

Re: Only one monitor at a time; Plasma 6 / Wayland [ SOLVED ]

% qdbus org.kde.KWin /KWin supportInformation
https://anonpaste.org/?280566f6ea35bc23 … UfTyqiw91r

% kscreen-doctor -o
https://anonpaste.org/?55b4a19d4eea9a45 … iqXCdWiNTy

No, only one or the other appears in system settings at a time. Opening the laptop lid disables and hides any mention of the external monitor entirely.

ls-alh

Member

Registered: 2024-07-22

Posts: 5

Re: Only one monitor at a time; Plasma 6 / Wayland [ SOLVED ]

Ah, embarrassingly, I seemed to have missed a drop-down menu in the display configurations module in system settings. It's been a while since I've used plasma (maybe since plasma 5.15). I swear i've been trying to debug this for days! Thank you for your time!