Within the last few days there was an update to the kernel image, and I stopped being able to reboot.
It looks as if the drive is not recognized, the error indicates that the UUID was not found. Odd, since the UUID repoorted is correct, and works fine with all earlier kernels. In fact it worked with earlier 3.14 kernels!
This is an old HP laptop, but I think that unlikley to be significant. Not looking for cause or troubleshooting at this point, or I would post a small library of diagnotics. Just wondering if anyone else has encountered this. Have you?