On some further research, this seems to be an xorg bug. I'll attach the contents of my /var/log/Xorg.0.log.old, which I presume to be the log file for the failed resume-from-suspend.
** Changed in: Ubuntu Sourcepackagename: None => xorg -- T43 sometimes fails to resume from suspend https://launchpad.net/bugs/64033 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
