Please see https://bugs.launchpad.net/ubuntu/+source/linux/+bug/292698 - it seems to be related. I experience the same issues and have attached a dmesg log there.
-- Unmount NFS filesystems before stopping network during suspend https://bugs.launchpad.net/bugs/30594 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
