Linux Wayland - Can't see display ID (or use the ones I can find)

[bunnypig]

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I've setup a virtual monitor and I would like to use it for Sunshine. The issue I'm facing is that I can't add my display to sunshine. I've used kscreen-doctor -o to find my display but if I put "Virtual-1" in "Display id" it just shows my primary screen. I've also tried to put 2 as my display ID but didn't work either.
These are the logs of the displays and kscreen output for the wanted display. Any idea what could be my mistake here?

[2026-02-20 02:34:32.767]: Info: Sunshine version: 2026.213.34323 commit: f442ff81e7cc2210de080a0ea00f17b31c7202d0
[2026-02-20 02:34:32.767]: Info: Package Publisher: LizardByte
[2026-02-20 02:34:32.767]: Info: Publisher Website: https://app.lizardbyte.dev
[2026-02-20 02:34:32.767]: Info: Get support: https://app.lizardbyte.dev/support
[2026-02-20 02:34:32.767]: Info: config: 'nvenc_preset' = 1
[2026-02-20 02:34:32.767]: Info: config: 'origin_web_ui_allowed' = wan
[2026-02-20 02:34:32.767]: Info: config: 'output_name' = Virtual-1
[2026-02-20 02:34:32.767]: Info: config: 'sunshine_name' = Bunny's PC
[2026-02-20 02:34:32.874]: Error: Failed to create session:
[2026-02-20 02:34:32.874]: Info: Found display [wayland-0]
[2026-02-20 02:34:32.876]: Info: Found interface: zxdg_output_manager_v1(31) version 3
[2026-02-20 02:34:32.876]: Info: Found interface: zwp_linux_dmabuf_v1(57) version 5
[2026-02-20 02:34:32.876]: Info: Found interface: wl_output(66) version 4
[2026-02-20 02:34:32.876]: Info: Found interface: wl_output(67) version 4
[2026-02-20 02:34:32.876]: Warning: Missing Wayland wire for wlr-export-dmabuf
[2026-02-20 02:34:32.876]: Error: Failed to gain CAP_SYS_ADMIN
[2026-02-20 02:34:32.876]: Info: /dev/dri/card3 -> nvidia-drm
[2026-02-20 02:34:32.876]: Error: Failed to gain CAP_SYS_ADMIN
[2026-02-20 02:34:32.876]: Error: Couldn't get handle for DRM Framebuffer [153]: Probably not permitted
[2026-02-20 02:34:32.876]: Error: You must use the 'sunshine-kms' service instead of the 'sunshine' service for KMS capture.
Please refer to the official documentation:
stable: https://docs.lizardbyte.dev/projects/sunshine/latest/md_docs_2getting__started.html#linux-1 beta: https://docs.lizardbyte.dev/projects/sunshine/master/md_docs_2getting__started.html#linux-1
[2026-02-20 02:34:32.876]: Error: Failed to gain CAP_SYS_ADMIN
[2026-02-20 02:34:32.876]: Info: /dev/dri/card2 -> vkms
[2026-02-20 02:34:32.876]: Warning: No render device name for: /dev/dri/card2
[2026-02-20 02:34:32.876]: Error: Failed to gain CAP_SYS_ADMIN
[2026-02-20 02:34:32.876]: Error: Couldn't get handle for DRM Framebuffer [54]: Probably not permitted
[2026-02-20 02:34:32.876]: Error: You must use the 'sunshine-kms' service instead of the 'sunshine' service for KMS capture.
Please refer to the official documentation:
stable: https://docs.lizardbyte.dev/projects/sunshine/latest/md_docs_2getting__started.html#linux-1 beta: https://docs.lizardbyte.dev/projects/sunshine/master/md_docs_2getting__started.html#linux-1
[2026-02-20 02:34:32.876]: Error: Failed to gain CAP_SYS_ADMIN
[2026-02-20 02:34:32.876]: Info: /dev/dri/card1 -> i915
[2026-02-20 02:34:32.889]: Info: Found display [wayland-0]
[2026-02-20 02:34:32.889]: Info: Found display [wayland-0]
[2026-02-20 02:34:32.890]: Info: Found interface: zxdg_output_manager_v1(31) version 3
[2026-02-20 02:34:32.890]: Info: Found interface: zwp_linux_dmabuf_v1(57) version 5
[2026-02-20 02:34:32.890]: Info: Found interface: wl_output(66) version 4
[2026-02-20 02:34:32.890]: Info: Found interface: wl_output(67) version 4
[2026-02-20 02:34:32.890]: Info: Resolution: 1920x1080
[2026-02-20 02:34:32.890]: Info: Resolution: 1280x800
[2026-02-20 02:34:32.890]: Info: Offset: 0x0
[2026-02-20 02:34:32.890]: Info: Logical size: 1920x1080
[2026-02-20 02:34:32.890]: Info: Name: HDMI-A-3
[2026-02-20 02:34:32.890]: Info: Found monitor: Philips Consumer Electronics Company Philips FTV
[2026-02-20 02:34:32.890]: Info: Offset: 1920x312
[2026-02-20 02:34:32.890]: Info: Logical size: 1280x800
[2026-02-20 02:34:32.890]: Info: Name: Virtual-1
[2026-02-20 02:34:32.890]: Info: Found monitor: Virtual-1-unknown
[2026-02-20 02:34:32.890]: Info: -------- Start of KMS monitor list --------
[2026-02-20 02:34:32.890]: Warning: Mismatch on expected Resolution compared to actual resolution: 0x0 vs 1280x800
[2026-02-20 02:34:32.890]: Info: Monitor 0 is Virtual-1: Virtual-1-unknown
[2026-02-20 02:34:32.890]: Info: --------- End of KMS monitor list ---------
[2026-02-20 02:34:32.890]: Info: Loaded portal restore token from disk
[2026-02-20 02:34:32.915]: Info: // Testing for available encoders, this may generate errors. You can safely ignore those errors. //
[2026-02-20 02:34:32.915]: Info: Trying encoder [nvenc]
[2026-02-20 02:34:32.915]: Info: Screencasting with XDG portal
[2026-02-20 02:34:32.915]: Info: Found display [wayland-0]
[2026-02-20 02:34:32.933]: Info: Hybrid GPU system detected (Intel + discrete) - CUDA will use memory buffers
[2026-02-20 02:34:32.933]: Info: Loaded portal restore token from disk
[2026-02-20 02:34:32.937]: Error: SelectDevices failed with response code: 2
[2026-02-20 02:34:32.938]: Warning: RemoteDesktop.SelectDevices failed, falling back to ScreenCast-only mode
[2026-02-20 02:34:32.948]: Info: Creating encoder [h264_nvenc]
[2026-02-20 02:34:32.948]: Info: Color coding: SDR (Rec. 601)
[2026-02-20 02:34:32.948]: Info: Color depth: 8-bit
[2026-02-20 02:34:32.948]: Info: Color range: JPEG
[2026-02-20 02:34:32.948]: Info: Connected to pipewire version 1.4.10
[2026-02-20 02:34:33.034]: Info: Streaming bitrate is 1000000
[2026-02-20 02:34:33.299]: Info: Creating encoder [hevc_nvenc]
[2026-02-20 02:34:33.300]: Info: Color coding: SDR (Rec. 601)
[2026-02-20 02:34:33.300]: Info: Color depth: 8-bit
[2026-02-20 02:34:33.300]: Info: Color range: JPEG
[2026-02-20 02:34:33.300]: Info: Streaming bitrate is 1000000
[2026-02-20 02:34:33.569]: Info: Creating encoder [av1_nvenc]
[2026-02-20 02:34:33.569]: Info: Color coding: SDR (Rec. 601)
[2026-02-20 02:34:33.569]: Info: Color depth: 8-bit
[2026-02-20 02:34:33.569]: Info: Color range: JPEG
[2026-02-20 02:34:33.569]: Info: Streaming bitrate is 1000000
[2026-02-20 02:34:33.574]: Warning: [av1_nvenc @ 0x3b6e7ac0] Codec not supported
[2026-02-20 02:34:33.574]: Error: [av1_nvenc @ 0x3b6e7ac0] Provided device doesn't support required NVENC features
[2026-02-20 02:34:33.827]: Error: Could not open codec [av1_nvenc]: Function not implemented
[2026-02-20 02:34:33.828]: Info: Screencasting with XDG portal
[2026-02-20 02:34:33.829]: Info: Found display [wayland-0]
[2026-02-20 02:34:33.829]: Info: Hybrid GPU system detected (Intel + discrete) - CUDA will use memory buffers
[2026-02-20 02:34:33.834]: Info: Creating encoder [hevc_nvenc]
[2026-02-20 02:34:33.834]: Info: Color coding: SDR (Rec. 709)
[2026-02-20 02:34:33.834]: Info: Color depth: 10-bit
[2026-02-20 02:34:33.834]: Info: Color range: JPEG
[2026-02-20 02:34:33.834]: Info: Connected to pipewire version 1.4.10
[2026-02-20 02:34:33.835]: Info: Streaming bitrate is 1000000
[2026-02-20 02:34:33.854]: Error: cuda::cuda_t doesn't support any format other than AV_PIX_FMT_NV12
[2026-02-20 02:34:34.102]: Info:
[2026-02-20 02:34:34.102]: Info: // Ignore any errors mentioned above, they are not relevant. //
[2026-02-20 02:34:34.102]: Info:
[2026-02-20 02:34:34.102]: Info: Found H.264 encoder: h264_nvenc [nvenc]
[2026-02-20 02:34:34.102]: Info: Found HEVC encoder: hevc_nvenc [nvenc]
[2026-02-20 02:34:34.104]: Info: Starting system tray
[2026-02-20 02:34:34.107]: Info: Adding avahi service localhost-live
[2026-02-20 02:34:34.110]: Info: Configuration UI available at [https://localhost:47990]
[2026-02-20 02:34:34.146]: Info: System tray created
[2026-02-20 02:34:34.147]: Info: Starting main loop
[2026-02-20 02:34:35.037]: Info: Avahi service localhost-live successfully established.

Sorry, forgot to mention some info about my system. I'm using Fedora 43, KDE, Wayland, Nvidia GeForce 3080.

[arcangelnew]

I have the same problem but while trying to select my primary display, my log looks weirdly similar to yours, I have tried with number IDs and display names DP-1, DP-2, HDMI-1, HDMI-A-1, etc, none works.

Devs should add a dropdown menu with detected displays where we can choose which one we want to use.

A temporary solution that seems ot work is to disable/unplug all the other displays and leave only the one you want for streaming, start a streaming session then end it, now plug/enable the other displays, haven't tested if this fix stays after a reboot.

[bunnypig]

I never got it to work but I asked for help on discord regarding a dummy-plug facing the same issue. They told me to install a newer pre-release version (and .rpm-version instead of appimage/flatpak) which solved my issue. Might be worth checking out, although it might be different from virtual display.