It should have occurred to me earlier to mention this, but I think this problem may not be strictly related to hibernate. I experience similar symptoms even when trying to boot up after what is meant to be a normal shut down.
Attached is a kern.log file showing a hibernate attempt (from which waking produced the described symptoms) followed by a shut down attempt (from which booting produced the described symptoms).
It should have occurred to me earlier to mention this, but I think this problem may not be strictly related to hibernate. I experience similar symptoms even when trying to boot up after what is meant to be a normal shut down.
Attached is a kern.log file showing a hibernate attempt (from which waking produced the described symptoms) followed by a shut down attempt (from which booting produced the described symptoms).