I can’t open Spectacle after update Plasma 6
Error: Launching Spectacle (Failed)
remote peer disconnected
I have exactly the same error, I am using nvidia 2060 GPU.
Edit:
I can’t make a new post, so I edited this one.
I did as cscs recommend, and it did not work. For now, I am using flameshot, which can be installed from the official repositories
Was desktop refresh performed?
https://wiki.archlinux.org/title/KDE#Configuration_related
And since nvidia…
Do you have kms?
What about the extra options suggested for nvidia+wayland?
Pretty much that is nvidia_drm.fbdev=1 if v.545 or newer.
And nvidia_drm.modeset=1 if older than v.545
https://wiki.archlinux.org/title/NVIDIA#DRM_kernel_mode_setting
at least I know I’m not the only one who has this problem 
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I had that same issue early in my testing of plasma 6.
It is your local configuration.
The cure is what everyone else has said - here and otherwise - Plasma 6 requires a complete reset of the plasma related items in the user profile.
.cache, .config and .local - with an emphasis on .cache - remove the folder - it will be recreated.
Fixed mine by replacing libva-vdpau-driver with libva-nvidia-driver. [1]
[1] 481977 – Spectacle crashes in NVIDIA driver code on startup after upgrade to plasma 6
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This is the way! Thank you. I also removed .cache just to be sure.
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libva-vdpau-driver does not exist in the repos or the AUR and should not be installed.
libva-nvidia-driver is vaapi with CUDA NVDEC backend translation layer for nvidia and may or may not be supported on your device.
Currently vdpau, nvdec, or nvenc are provided by nvidia-utils, again depending on your device.
https://wiki.archlinux.org/title/Hardware_video_acceleration
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