My system keeps getting a Dependency resolution failed error when trying to update, I’ve tried it multiple time but keep getting the same error.
Dependency resolution failed:
The following packages have unmet dependencies:
okular-backends: Depends: libokular6core4 (= 4:25.12.0-0zneon+24.04+noble+release+build35) but 4:26.04.0-0zneon+24.04+noble+release+build41 is to be installed
powerdevil: Depends: libpowerdevilcore2 (= 4:6.6.4-0zneon+24.04+noble+release+build73) but 4:6.5.4-0zneon+24.04+noble+release+build58 is to be installed
Depends: plasma-workspace (>= 4:6.6.4) but 4:6.5.4-0zneon+24.04+noble+release+build68 is to be installed
Have you been seeing this for a long time?
This version is from December.
Are you running sudo apt update first? You might need to look for errors or messages from that, as well as those earlier in the wall of output from sudo apt full-upgrade.
This shouldn’t be an issue, but I wonder if the recent DDOS attcks on Ubuntu, including its repos, is a factor in this? Some of their repo components have been up and down since the weekend, though it seems fine now. You would see this when running apt update.
But also it could be a bug in dependency lists from not having been updated in five months. It should be solvable, I think.
yeah, It’s an old laptop is swapped to Linux for fun but haven’t done much with. I don’t really know what the Sudo apt update is, I’m very new to Linux. I’ve just been trying to update the system through the discover software center that came installed with KDE Neon, and it worked for system updates back when I first installed KDE. I will have to agree it’s probably a bug from not being updated in a while.
Ok I figured out that sudo was a command, and running both got my laptop to update, but caused my desktop environment to break and I couldn’t log in. so I tried a fix I found on reddit:
alt ctrl f3 to login manually
sudo apt update
sudo apt install --reinstall sddm
sudo systemctl restart sddm
and then reboot
but ran into another error:
Fatal error: The following packages have unmet dependencies: kf6-kfilemetadata: Depends: libpoppler-qt6-3t64 (>= 24.08.0) but 24.02.0-1ubuntu9.8 is to be installed
I then found your fix
sudo apt update (if you haven’t already)
sudo apt install libpoppler-qt6-3t64=24.08.0-1+24.04+noble+release+build15
but just gave an error saying that the libpoppler-qt6-3t64=24.08.0-1+24.04+noble+release+build15 didn’t exist.
So I tried to just run full-upgrade again then reboot, no errors and working again.
No clue what fixed it but glad it’s working again XD