If I can expand upon duplex printing I have encountered an issue in the control
centre 18.10 too.
When enabling duplex in gnome-control-center it does not work,
$>lpoptions -l
...
Duplex/Two-sided: *None DuplexNoTumble DuplexTumble
...
but when doing so in system-config-printer it does
$>lpopt
Hi All, I cannot specify software-properties-QT in package. Also the bug
title specifically says software-properties-qt.
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https://bugs.launchpad.net/bugs/1801439
Title:
Unable to add so
Public bug reported:
Test
1. Start Software-properties. E.g. sudo software-properties-qt
2. Navigate to Other Software (Tab), Add -> Add, to add a PPA
3. Insert the PPA string. E.g. "deb
http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu cosmic main "
4. Click Okay.
The software sources list