I did not managed to find anything suspicious in the logs. Do you know how can I isolate events related to suspend/resume? Curiously, in my case the bug is triggered even if I already detached and removed external drive - system somehow "remembers" the fact. Also I highly doubt that it's hw-caused: bug appears with 3 different external usb drives, in 14.10 they worked just fine, as well as suspend on the same laptop.
** Changed in: xfce4-session (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1454253 Title: external usb breaks suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfce4-session/+bug/1454253/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs