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

[Colin Law]

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.

In fact editing /etc/apt/source.list is often not the solution as many
sources are defined by files in /etc/apt/sources.list.d

Colin

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