The brightness slider is not shown, not sure if it's related to kdesrc-build. powerdevil at 03aea987b790abbaa50d799cfa75abe10ae12617 Qt 6.6.0
It's a dev session issue, right Nico?
It is a dev session, I can still control brightness via `xbacklight -set xx`
https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/3257 attempts to fix it