Correction. I've been playing around with it, and my problem is similar to yours, but shutdown is not affected, only restart. I noticed that when Ubuntu restarts, it reloads the kernel, not the entire computer. This might have something to do with it.
Correction. I've been playing around with it, and my problem is similar to yours, but shutdown is not affected, only restart. I noticed that when Ubuntu restarts, it reloads the kernel, not the entire computer. This might have something to do with it.