I traced the problem to one of the xorg packages. Right now I have all the xorg packages held at their versions from 8.10, and the problem has gone away. I'll enter a new bug for xorg and this one can be closed.
-- SIGWINCH causes brief hang https://bugs.launchpad.net/bugs/367581 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