This worked for me - it appears a policykit startup program was launching a KDE rather than a gnome version.
The solution is: System/Preferences/Startup Applications Under the Startup Programs tab uncheck PolicyKit Authentication Agent. Click on Add to create a new startup program. In the Add Startup Program window enter the following in the Command: box - /usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1 In the Name: box give the new startup program a name -I called mine gnome Policy Kit. Click on save and have this as the new 'policykit startup program'. I can now install programs from the Software Centre. -- Install Button not Working - nothing happens https://bugs.launchpad.net/bugs/591129 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
