More information: I finally located the controls I needed in System Monitor. Of course, under Unity the menus had migrated from the actual application window up to the system's top bar. What a confusing mess! Whoever came up with that grand idea should be flayed with thousands of wet noodles. But I digress...
The actual program which was using 100% CPU was Dropbox, running as root, attempting an update. I have reported that bug to Dropbox. So this bug report becomes: When some other process is running at 100% root CPU on one processor, software install attempts stall forever even if other processors are available. -- Vernon -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/873439 Title: software install attempt stalls with 100 percent CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/jockey/+bug/873439/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
