Adding this PPA seems to have fixed the issue:
https://launchpad.net/%7Esane-project/+archive/ubuntu/sane-release
I found that tip over at https://askubuntu.com/questions/1255984
/scanner-of-epson-et-2750-doesnt-work-sane-start-invalid-argument-
kubuntu/1271886#1271886
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You received this bug
Public bug reported:
I am running Kubuntu 20.04 with Ubuntu Studio on an HP zbook 15 G3. My
printer / scanner is an HP Envy 5542.
Scanning at the defaults, text 150 dpi / image 300 dpi works 'out of the
box'.
Changing resolution to 600 / 1200 dpi sets the scanner working (shows
"Scanning..." in
Not sure if 'invalid' or 'fix released' fits better, for now marking
this as invalid.
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Bugs, which is subscribed to kubuntu-meta in Ubuntu.
https://bugs.launchpad.net/bugs/1914769
Title:
Kubuntu 20.04 USB boot disk fails
It turns out this is because of a broken USB stick. Working while using
Ubuntu Studio, breaking somewhere in the process of 'burning' Kubuntu.
With a new USB, installation works as expected.
** Changed in: kubuntu-meta (Ubuntu)
Status: New => Invalid
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Additional info: This bug seems to be the same:
https://bugs.kde.org/show_bug.cgi?id=381693 (although it says to affect
the Archlinux Packages)
** Bug watch added: KDE Bug Tracking System #381693
https://bugs.kde.org/show_bug.cgi?id=381693
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Additional info:
grep Name=org.freedesktop.Notifications /usr/share/dbus-1/services/*
returns:
/usr/share/dbus-1/services/org.kde.plasma.Notifications.service:Name=org.freedesktop.Notifications
Public bug reported:
I installed Ubuntu Studio 20.04 which is using XFCE.
I want to run Ubuntu Studio on Kubuntu, so did 'sudo install kubuntu-
desktop'
After this, notifications in Plasma are marked "Notifications service
not available" and a message given "Notifications are currently provided
