I have removed bug 23302 as a duplicate because thunderbird may wish to handle this problem before spec in previous comment be implemented.
Also removed on bug 47145 and bug 62638, because I believe gdm is a critical program that need special measure to handle lack of disk space. -- Many programs misbehave when running out of disk space https://launchpad.net/bugs/22842 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs