That repository is an unsupported third party repository (and I'm pretty sure it doesn't cause your problems).
** Changed in: linux-source-2.6.15 (Ubuntu) Status: Unconfirmed => Rejected -- System hangs when installing seveas repository's libwxgtk2.6-0 package https://launchpad.net/bugs/57926 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs