I think I've figured out why this is happening. If I restart directly into Ubuntu, then it works correctly and the setting is remembered. However, if I restart into Unity, then back into Ubuntu, the setting is forgotten. Perhaps Unity is overwriting the setting?
I think I've figured out why this is happening. If I restart directly into Ubuntu, then it works correctly and the setting is remembered. However, if I restart into Unity, then back into Ubuntu, the setting is forgotten. Perhaps Unity is overwriting the setting?