This has been confirmed by three people in the comments, and what appears to be one more in the forum thread mentioned at the top of the comments. Changing to Needs Info until we have at least an lspci output and xorg.conf
** Changed in: xscreensaver (Ubuntu) Status: Confirmed => Needs Info -- previewing "molecule" in screensaver preferences causes system to hang https://launchpad.net/bugs/72672 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs