Are you using lightdm or gdm? Can you attach your .xsession-errors file from after reproducing the bug?
You mentioned the regression started just recently; could you narrow down on a date range? We haven't had much change in X, so it's possible the bug is due to something else; knowing roughly when the regression started we can examine your dpkg.log to see what might be causing it. I'm attaching a parsed list of packages that you upgraded in the past couple days. I notice there was a kernel upgrade in this period; you could try booting into 3.0.0-8 and see if you can reproduce it there (hold down the left shift during boot to bring up the kernel boot menu). ** Attachment added: "dpkg.txt" https://bugs.launchpad.net/ubuntu/+source/xterm/+bug/831336/+attachment/2300428/+files/dpkg.txt ** Changed in: xterm (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xterm in Ubuntu. https://bugs.launchpad.net/bugs/831336 Title: running 'xterm' exists X session To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xterm/+bug/831336/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp