If the KVM tells the PC that the TV has been disconnected, then you can just disable the other screens in the display settings while the TV is connected, and it’ll just work. Which screens are enabled or disabled is remembered depending on the currently connected displays.

No, only when you click on an input field and have it enabled in the system tray

The virtual keyboard is hidden by default, unless you’re using touch. You can change that by setting the KWIN_IM_SHOW_ALWAYS=1 environment variable, until there’s a proper setting for it

Yes, for now someone has to be logged in and have the server running

Just click the button in the sddm settings page

That’s just a law of computers, the default arrangement of monitors must always be wrong.

You can just sync your Plasma settings to SDDM though, and it’ll use the same output settings as your session

Fedora just has

polkit.addRule(function(action, subject) {
    if ((action.id == "org.freedesktop.packagekit.package-install" ||
         action.id == "org.freedesktop.packagekit.package-remove") &&
        subject.active == true && subject.local == true &&
        subject.isInGroup("wheel")) {
            return polkit.Result.YES;
    }
});

in /usr/share/polkit-1/rules.d/org.freedesktop.packagekit.rules. If you put the same file in there, it should work.

Yes, and many distros have a polkit rule set up to allow installing or updating without a password. You can likely just copy it from Fedora or sth

Setting the speed to the max does turn them off

The only effects relevant for performance are blur and background contrast. Turn those off if you feel the system is slow, maybe increase the animation speed and you’re done

You can probably implement it in the script itself, but there’s no external functionality to do it

I’m one of the KWin maintainers, I can tell you with absolute certainty that this hasn’t changed. Maybe you were on Xorg then?

No, they were always global. Scrolling on the desktop to change virtual desktops was disabled by default, but nothing changed about the three finger gestures

It was already a pain that one could not personalize these actions, but at least the defaults were ok for me (3 finger up/down for desktop grid/present windows). And I could use fusuma for more.
The new defaults hijacks all 3-finger gestures to scroll one virtual desktop up/down left/right which I find useless.

You don’t remember the gestures on Plasma 5 correctly. They already used both 3 and 4 finger gestures like they do now, and 3 finger gestures were for virtual desktop switching too.

I don’t know tbh, I see neither any MR that removed it, nor the option you’re talking about.

What you want is now a built in option, you can set the screen saver timeout for when the screen is locked separately from the normal timeout

Debian ships the latest thing that’s available at the time of tagging, and that is not bug free in any way or form. In the case of Debian 12 that’s Plasma 5.27.5… There were 5 bugfix versions after that. People are experiencing known bugs on Debian stable, not no bugs.

Debian stable doesn’t ship our bugfix releases. It is not “stable” in the meaning that normal people use

Virtual desktops are strictly worse for the purpose of separating things like work and gaming

Yes