On Sun, 6 May 2012, Mike Miller wrote: > Synaptic can be selected in the Software Center, so I did that, but it > won't run. I get this error: > > No protocol specified > No protocol specified > > (synaptic:12287): Gtk-WARNING **: cannot open display: :0 I was using "sudo synaptic" to get that error, but if I use simply "synaptic", then it runs, but it notes that I do not have root permissions. I'm not the first to have this problem, apparently. There are plenty of lengthy discussions about it with many proposed solutions failing. It seems that root isn't allowed to access my display :0. That's odd. After awhile I decided that maybe it was because I hadn't rebooted after installing a bunch of packages (including synaptic). So I rebooted. That solved it. Now "sudo synaptic" works just fine. So that solves the synaptic problem but I still would like to hear what all of you are using. Thanks. Mike