The problem was that the /tmp has been mounted with noexec option. After disabling this option the upgrade starts normally.
See: http://ubuntuforums.org/showthread.php?t=615810 -- do-release-upgrade fails with "OSError: [Errno 13] Permission denied" https://bugs.launchpad.net/bugs/342171 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
