I don't like screen lock at all, personally. But since Safari requires you have it turned on to remember all passwords, I'm stuck with it. But at least if I set it to 4 hours, I won't have to deal with it much. That notion works great on my Mac mini. But on this MacBook Pro, it prompts me for my password instantly. Meaning as soon as the display goes to sleep and I wake it up. Even if it's 1 second later, I have to give it my password.
I've tried toggling it on and off, switching around the chosen time value. But nothing seems to help. It still looks like it's set for a 4 hour delay, but it still acts like it's set to "immediately".