Fedora 40 KDE ( server-netinst-20240322.n.0) vs KDE Plasma 6.0.2 port to Manjaro 23.1

UPDATE as of 03/27/2024

The most radical means of solving all problems would be to switch to Fedora 40 Beta either openSUSE Tumbleweed

END UPDATE

UPDATE as of 03/25/2024 

KDE Plasma 6.0.2 may be ported to Manjaro 23.1 by commands

$ sudo pacman-mirrors --api --set-branch testing

$ sudo pacman -Scc

$ sudo pacman-mirrors --fasttrack 5 && sudo pacman -Syu

If you are getting error :

error: failed to prepare transaction (could not satisfy dependencies)
:: installing pacman (6.1.0-4) breaks dependency 'libalpm.so=13-64' required by libpamac

Switch back to sudo pacman -Syyu . This error turns from random to regular for me. At the time of writing you are supposed to get message - Total (0/673) regarding number of packages ready to be installed .

Per advise of oioi@https://forum.manjaro.org/t/i-tested-kde-6-oh-my-oh-my-you-will-be-sorry-here-come-some-discoveries/158436/24  I issued  `sudo pacman -S qt6-imageformats`  :- 

• webp : qt5-imageformats → qt6-imageformats
• gimp : kimageformats5 → kimageformats

What actually is going on when this install happens on CachyOS 2024.3

$ sudo pacman -S qt6-imageformats
[sudo] password for boris:  
resolving dependencies...
looking for conflicting packages...

Package (2)                        New Version  Net Change  Download Size

cachyos-extra-v3/libmng            2.0.3-3.1      0.75 MiB       0.21 MiB
cachyos-extra-v3/qt6-imageformats  6.6.2-1.1      0.30 MiB       0.06 MiB

Total Download Size:   0.27 MiB
Total Installed Size:  1.05 MiB

:: Proceed with installation? [Y/n] Y

It fixes the problem on Manjaro testing all the way around . VENV screenshot  first

I also believe that explanation provided at https://unix.stackexchange.com/questions/762064/what-is-the-different-between-pacman-syu-syyu-and-syuu is correct 

Brief extract from link above :-

   As for -yy, it is generally not recommended. Use it only if you're having problems with your mirror. Unless your mirror is acting up and you want to switch mirrors, there is no reason to re-download every package DB file in its entirety every time you want to do an upgrade. You might want to use it when switching mirrors so that all your package DB files are consistent.

Bare metal Manjaro Testing instance

END UPDATE

Porting KDE Plasma 6.0.2 to Manjaro 23.1 was performed by commands

$ sudo pacman-mirrors --api --set-branch testing

$ sudo pacman -Scc

$ sudo pacman-mirrors --fasttrack 5 && sudo pacman -Syyu

I may confirm the issue mentioned in https://forum.manjaro.org/t/i-tested-kde-6-oh-my-oh-my-you-will-be-sorry-here-come-some-discoveries/158436

Quoting the post on forum.mangaro.org above:

<<So after update (pacman -Syyu) you have no webp thumbnails in Dolphin and Gwenview cannot display those photos (webp). What will a typical user do? >> 

I've also tested with no problems opening *.webp files via Dolphin on the most recent fedora 40 KDE nightly build. See snapshot :-

Attempt to open *.webp file via Dolphin KDE Plasma 6.0.2 port to Manjaro 23.1 

Same test on openSUSE Tumbleweed

Same test on CachyOS 2024.3 (Arch Linux clone) and failure again. Clean KVM Guest was deployed , no user's porting 

Neon KDE as of 03/21 performs just fine