The problem in my case seems to have been the acx driver. Fortunately I wasn't using it, so could just blacklist it. The hardware is:
lspci: 00:0d.0 Network controller: Texas Instruments ACX 111 54Mbps Wireless Interface lspci -n: 00:0d.0 0280: 104c:9066 -- Intrepid frequently locks up (no crash reports) https://bugs.launchpad.net/bugs/267019 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to meta-gnome2 in ubuntu. -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
