Hi,
not sure if I can really blame Mate for this. I moved from Ubuntu Unity 16.04 to Mate 18.04 via reinstall and now have trouble printing to the network printer (some sophisticated central windows server based printer queue system called Follow-me). The issue is that when I add the printer with the correct https address I cet a dialogue that asks for a password for user "negotiate". I have a user name and password but since it presets the user name field with "negotiate" there is no chance to successfully connect to the printer queue .
I checked /etc/cups/printer.conf and yes it is added: AuthInfoRequired negotiate
Removing that does not really help since it is overwritten with every job (attempt).
Anyone notice this too since the upgrade?