Unable to enable or disable repository in Software & Updates

Bug #1660100 reported by PJSingh5000 on 2017-01-29
This bug affects 8 people
Affects Status Importance Assigned to Milestone
software-properties (Ubuntu)

Bug Description

The Software & Updates dialog (software-properties-gtk) does not allow the user to activate or deactivate repositories.


Launch Software & Updates.
Select Other Sources tab.
Click on a check box next to a repository to enable or disable it.


The window seems to lose focus, but noting happens.


A dialog should appear prompting the user to enter the administrator password.
After the password is successfully entered, the repository check box should be toggled (enabled or disabled).


This issue was tested on Ubuntu-Gnome.

$ lsb_release --all
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.10
Release: 16.10
Codename: yakkety

$ uname -a
Linux PS001 4.8.0-34-generic #36-Ubuntu SMP Wed Dec 21 17:24:18 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: software-properties-gtk
ProcVersionSignature: Ubuntu 4.8.0-34.36-generic 4.8.11
Uname: Linux 4.8.0-34-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
CurrentDesktop: GNOME
Date: Sat Jan 28 23:14:17 2017
InstallationDate: Installed on 2017-01-24 (4 days ago)
InstallationMedia: Ubuntu-GNOME 16.10.0 2017.01.23 amd64 "Custom Yakkety Yak"
PackageArchitecture: all
 PATH=(custom, no user)
SourcePackage: software-properties
UpgradeStatus: No upgrade log present (probably fresh install)

PJSingh5000 (pjsingh5000) wrote :
PJSingh5000 (pjsingh5000) wrote :

When software-properties-gtk is run from the terminal, the following error is displayed:

$ software-properties-gtk
ERROR:root:Authentication canceled, changes have not been saved

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in software-properties (Ubuntu):
status: New → Confirmed
Adric Norris (landstander668) wrote :

I'm seeing the exact same problem, on an up-to-date Ubuntu 16.10 amd64 installation. The only oddity to my configuration is that I'm running the 4.9.6-040906-generic mainline kernel, because the stock Ubuntu kernel has stability issues with the ASUS Zenbook UX501VW. Based upon the original submitter's reported kernel, however, I doubt that's significant to this bug.

For what it's worth, other activities which need to display the authentication dialog (such as unlocking a SSH key) don't appear to be encountering any difficulty.

Adric Norris (landstander668) wrote :

Just for fun I tried upgrading software-properties-gtk to version (along with both dependencies) from "http://us.archive.ubuntu.com/ubuntu/pool/main/s/software-properties/". Unfortunately that didn't make any apparent difference.

I also tried downgrading to version, which also exhibits the same failure.

Adric Norris (landstander668) wrote :

I've attached a strace of software-properties-gtk, taken with the "strace -fr -o software-properties-gtk.strace software-properties-gtk" command. The only thing which stands out to me is that there are a *lot* of EAGAIN entries for file descriptor 3, which appears to be the local "/tmp/.X11-unix/X0" socket. The file exists, and has what I'd expect to be usable ownership and permissions.

     $ ls -l /tmp/.X11-unix/X0
     srwxrwxrwx 1 adric adric 0 Feb 12 09:24 /tmp/.X11-unix/X0

AS PJSingh5000 indicated, the only message displayed on the terminal was

   ERROR:root:Authentication canceled, changes have not been saved

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