I feel certain now that this is somehow connected to lock screen, so I updated the bug title accordingly. Now on kernel 3.13.0-30-generic with the problem still present. Currently testing a workaround where suspend is stalled a few seconds by an /etc/pm/sleep.d script to allow lockscreen fade animation to complete before machine is actually suspended.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1301601 Title: [Dell Latitude E7440] suspend sometimes freezes when lock screen activates To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1301601/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs