Hey peeps. Like the subject says, I can't open Sofware Sources, Synaptic from GNOME and Update Manager hangs when I try to DO anything. I've done a fair bit of searching, but nothing seems to work.
I'm not sure when this started happening, but it might've been after I customized a theme (?) or chose a different default theme.
Here are my symptoms.
-- Choosing Software Sources and Synaptic Package manager causes taskbar to display "Starting Adminstrative Application..." and then taskbar item disappears and nothing happens.
-- sudo synaptic (and gksu synaptic) has a weird delay (see below), produces a warning then opens and works correctly (this is the warning: "Warning, failed to load: package-supportedUnrecognized image file format". There's no space between -supported and Unrecognized.) Synaptic seems to be running slowly.
-- System Testing seems to hang with no acvitity on "gathering information". (No change after 15 minutes.)
-- Any sudo command, even 'ls' has a weird five-second pause, even on the 2nd run (after I've entered my password).
-- apt-get commands produce no errors
-- In Update Manager (which opens)clicking Settings..., Check or Install Updates causes hang and Update Manager must be "Force Quit"
-- sudo apt-get update && sudo apt-get dist-upgrade successfully update my system