[Edubuntu-bugs] [Bug 1732562] Re: package edubuntu-artwork 15.12.1 failed to install/upgrade: subprocess installed post-removal script returned error exit status 127

Just got this issue on Focal: ``` Setting up edubuntu-artwork (15.12.1) ... /var/lib/dpkg/info/edubuntu-artwork.postinst: 18: update-gconf-defaults: not found dpkg: error processing package edubuntu-artwork (--configure): installed edubuntu-artwork package post-installation script subprocess re

[Edubuntu-bugs] [Bug 1842492] Re: Device disconnects from Ubuntu when I send ebook via Calibre

Also had problem with Ubuntu 18.04 and version 3.21 calibre. Fixed using upgrade info at calibre which installed calibre 4.15: sudo -v && wget -nv -O- https://raw.githubusercontent.com/kovidgoyal/calibre/master/setup/linux- installer.py | sudo python -c "import sys; main=lambda:sys.stderr.write('D