xdg-desktop-portal-gnome has actually properly been updated to handle this, whereas xdg-desktop-portal-kde has not.
No, that’s completely wrong. Like I said, Xwayland doesn’t remember the permission, which xdg-desktop-portal-kde would very much support.
You get the exact same prompts every single time on Gnome too.
The problem has persisted for years
This feature hasn’t existed for years, it’s quite new.
This has absolutely nothing to do with GTK or system trays, and it is in no way or form specific to KDE Plasma or a bug in it. It’s an Xwayland feature that was poorly thought out and that’s challenging to work around.
kde on wayland issue is making it pop up over and over again
Unfortunately it’s an Xwayland issue. It doesn’t remember the permission, and it also doesn’t give the desktop any information to work around it. Because of how portals work, the desktop doesn’t even know the request is coming from Xwayland :/
Screen mirroring is kinda shitty rn, this might get fixed with future changes for Plasma 6.4 (which make it less shitty in general). It’s probably worth fixing this as a separate thing for 6.3 though, so please make a bug report about this for KWin at bugs.kde.org
KWin had the shortcut built in and enabled by default at some point, but I removed it, for Plasma 6 IIRC. If shortcuts still work, you can switch to a different tty and execute kwin_wayland --replace for a similar effect - which you can’t hit accidentally and which might not crash all the apps with it.
fully up to date Debian Stable
Now that’s quite the oxymoron… Debian stable is on Plasma 5.27.5, that’s 6 bugfix-only releases behind the upstream 5.27 branch, which itself is very old by now and has seen its last release almost a year ago.
That all is to say, if you want to avoid crashes, avoid Debian stable.
It’s not a shortcut configured by us, but a thing Xorg does specifically. Be grateful it doesn’t require editing Xorg configs…
It is doing that. It just doesn’t give the portal any information at all - neither that the request is coming from Xwayland, nor what X11 app is trying to emulate input.
Like I said, the feature has been really poorly thought out.
It keeps the handle around until the X11 app’s process exits, then it’s gone. It’s how all on-demand permissions work, unless you do special stuff to restore it later without user interaction.
Yes, they patch permission prompts out entirely. They do that on their KDE edition too.