Closing is alright. I reinstalled the system from scratch, which solved all issues. So it was a problem on my box indeed. Sorry for not telling this earlier...
-- installation breaks with 'subprocess post-installation script returned error exit status 245' https://launchpad.net/bugs/39812 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
