Welcome @FabianM, thanks for chiming in and do some testing.
I did not need compiling to get testing.
The steps I ended up doing to get Plasma6/Qt6 installed:
Download Cassini Nova R3 ISO
install it on a spare partition
run yay to update, reboot, login
edit /etc/pacman.conf to add: kde-unstable, core-testing, extra-testing.
These need to be, in this order, before the [endeavouros] entry, as @Schlaefer pointed out[3].
run yay to update to get Plasma6 on board
reboot, login
There was a problem along the way with qt6-shadertools (which was missing when I did the Plasma 6 install); but that was since resolved.
Also there was an GPGME error along the way, coinciding with anappstream-qt dependency conflict, which were resolved as per [1] and [2].
Widgets are still not working under Plasma 6, I believe.
This is what I remember doing to get rolling with Plasma 6.
As to browsers: I have experienced lots of crashes trying to copy (both ctrl-c/v and drag/drop) images from Gwenview to a Firefox -tab.
In that use case Gwenview crashed almost 100% of the time, so did Dolphin.
Using Chromium is a workaround.
Want to check if that happens on Plasma 5 as well, before looking into that a bit more.
As to reporting bugs at bugs.kde.org, it’s not always trivial for me to find duplicates of a bug I want to report.
Case in point:
I had searched for similar bug reports, and found none I recognized as such, before I reported:
“Testing Plasma6/Qt6: Pressing META-key a second time does not close the start menu”[1].
It was however marked as a duplicate of:
“Widgets’ activation shortcuts don’t close their popups anymore”[2].
None of the keywords I would have thought of searching for would have brought up this particular report - and if it would have been, I don’t think I would have thought it pertaining to what I wanted to report.
Still, people at KDE didn’t complain, they just marked my report as a duplicate, I got notified, and as “end user” I know that they are working on resolving the issue.
in testing never, only the stable release will get promoted to testing - in KDE-unstable latest the day after it is released (at least that is my guess by looking at the update frequency in KDE-unstable)
Frankly, I don’t really know anything about repositories. So, I looked it up[1].
The gist is:
core-testing
core-testing contains packages that are candidates for the core repository.
core-testing is the only repository that can have name collisions with any of the other official repositories. If enabled, it has to be the first repository listed in your /etc/pacman.conf file.
extra-testing
This repository is similar to the core-testing repository, but for packages that are candidates for the extra repository.
kde-unstable
This repository contains the latest beta or Release Candidate of KDE Plasma and Applications.
Frameworks seems to just have dropped on kde-unstable.
The plasma DE alpha doesn’t start anymore here, so it’s probably a good idea to wait for beta plasma desktop packages too.
Or it’s a packaging issue:
$ plasmashell --replace &
plasmashell: error while loading shared libraries: libKUserFeedbackCoreQt6.so.1: cannot open shared object file: No such file or directory