I am an Linux Beginner and I only can use Terminal for copy/paste issues.

 

For many months my Raspberry Pi 5 runs perfectly with Armbian. But when I try to update the system in the Discover App, I get the following error message:

 

The following packages have unmet dependencies: kpim6-akonadi: Kollidiert mit: knotes but 4:24.05.2+p24.04+vstable+git20240705.1500-0 is to be installed Kollidiert mit: kpim6-akonadi-notes but 4:24.08.3+p24.04+vstable+git20241129.1417-0 is to be installed 

 

Can someone please help me to get my system up-to-date? Thanks in advance!

It looks like knotes has been replaced with Marknotes. Remove knotes and, if you like, install marknotes. It is supposed to import your old knotes data.

As I mentioned before, I am a Newby and I am able to use the Terminal. But I don’t know, what to do to remove knotes.

You can remove packages in Discover.

Now I did exactly this and after rebooting the Pi, I just get a black screen with a movable mouse cursor. Nothing more, it doesn’t matter how long I wait. What problem is this now?

most likely a bunch of packages that shouldn't have been removed were removed alongside, the joys of GUI package management

 

1) don't be afraid of the command line

2) see if /var/log/dpkg.log gives any hints what is missing

 

What desktop system were you using before?  Try to get it back installed.

 

PS: In your current situation, you can reach a log-in console and command line with Ctrl-Alt-F1

PPS: Reinstalling from scratch might be faster.

Did you do Update All after removing knotes?

If you were running wayland you will probably need to use Ctrl-Alt-F3 as wayland uses F1 and there is an (unusable) X server on F2 for xwayland. Then, after logging in

sudo apt update
sudo apt full-upgrade

If that's not enough try

sudo apt install task-kde-desktop