See https://bugs.launchpad.net/ubuntu/+source/linux/+bug/467877 for another variable: check whether the problem occurs when you start on AC power, suspend, remove the power cord, and then try to resume on battery power.
See https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/467877 for another variable: check whether the problem occurs when you start on AC power, suspend, remove the power cord, and then try to resume on battery power.