Can't change software sources via GUI following upgrade to 17.10 (using Gnome)

[Colin Law]

On 22 November 2017 at 16:40, Colin Law <clanlaw at gmail.com> wrote:
> On 22 November 2017 at 15:52, Kaj Haulrich <kaj at haulrich.net> wrote:
>> On 22-11-2017 14:59, Colin Law wrote:
>>>
>>> Having upgraded to 17.10 (from 17.04), when I open Software and
>>> Updates I am unable to select or deselect s/w sources. I do not get
>>> the popup asking me to enter my password.  I do not see the problem on
>>> another machine with a fresh install of 17.10.
>>>
>>> Any suggestions where I might look to sort it? No success searching
>>> Google and Launchpad.
>>
>>
>> The easy way: You could install synaptic and manage your sources from there.
>> or the nerdy way:
>> edit /etc/apt/sources.list (as root, of course).
>
> Thanks, but actually I was trying to work out why it does not work
> using the standard app.  If I can determine why it does not work then
> I can decide whether I should file a bug or whether I have just messed
> something up myself.

For the record I decided this is a bug so have filed it.
https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1734095

Colin