I think I hit this too. Very puzzling because I first I used the GUI without invoking it from a terminal. It worked for a while and then silently went away. Not even an oil slick.
When I invoked it from a terminal (sudo update-manager -d) it had this "Signal 0" message (which makes no sense to me since there is no signal 0 -- signals start at 1). This was enough for me to google and get here. But no solution was presented here, so I went to <https://bugs.launchpad.net/ubuntu/+source /ubuntu-release-upgrader/+bug/1203534> (thanks Kelly). >From there I learned that the proprietary nVidia driver was the trigger for the problem. I searched in vain for a GUI tool to switch back to Nouveau (there used to be one in Settings: Hardware, but no more -- pity!). I tried the canned apt-get commands but they didn't work. What appears to be working is using the command "do-release-upgrade". Thanks to <https://launchpad.net/~ric-almeida> for mentioning this in 1203534 Unfortunately, because do-release-upgrade is working (as I type this), I cannot go back and capture precise information about the "sudo update- manager -d" failure. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1241684 Title: Upgrade 13.04 to 13.10 Fail real-time signal 0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1241684/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
