Today's update breaks Dolphin

[GreyGeek]

FYI: Just did the 20.04 (Focal) update (7:50PM 1/12/2020) and this is what happened:

Unable to create io-slave. klauncher said: Error loading '/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/file.so'.

The file is present, owned by root and marked readable by the world:

[FONT=monospace][COLOR=#000000]-rw-r--r-- 1 root root 127504 Jan 11 07:19 /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/file.so
[/COLOR][/FONT]

Reinstalling kio did not help.

EDIT: This is a rare case where just rebooting fixed the error. Usually, the only time one needs to reboot Linux is when the kernel changes. (I could have just tried logging out. That probably would have fixed the problem as well.) And, usually, when one has to reboot after an update there is a notice in the system tray telling the user to do that. This time there was not.

[claydoh]

With a big library update, sometimes old libs are still loaded in ram, but complain/crap out when the old stuff it needs is gone. Usually a logout will fix it, not a reboot. Or (iirc) in this case reloading dbus and launching dolphin manually: dbus-launch dolphin

I think some one from each and every distro that has added the latest plasma or frameworks in the last week or so has seen this error.

[oshunluvr]

Yeah, I had the same experience. Reboot seems to have fixed it.

[mick.kde]

I rebooted and that solved the problem. Thank you.

Mick

[simonsaysthis]

Ha. I had the same error and was going off my head trying to figure out what I did wrong. After reboot went away by itself though.