aluminum macbook brightness help??????

Yes but it depends what your setting is. If you go to System Preferences>Energy Saver and click on the "Battery" tab, is the box "Slightly dim the display..." checked or unchecked? If it is checked, then when you connect the MagSafe, you will get that "extra" brightness if not then your brightness will be what the control is currently set as.

 

The following screenshot is from a MBP, but it should say the same.



As you can see there is an option to dim the display if the battery is used. Maybe yours is not checked.

As for getting more brightness, you could change the Gamma in your display profile, but that would lead to a worse calibration.

I don't know about the LED MacBooks, but the LED MBPs displays burn like hell if set to maximum brightness in a dark environment.

 

I don't mean to seem rude, as I do want to help you, but I cannot understand what you're trying to convey.

Are you saying that once you unplug the AC the screen dims? Then, when you plug it back in, the brightness doesn't increase?

 

You already said that, but did you do what iLog and me suggested?

 

I think that he thinks that you are supposed to get another notch of brightness (above the 16th one when you are using your keyboard to adjust it) when you plug your macbook into ac. This isn't true. You can push it up to max brightness on battery.

 

Even when the "slightly dim ..." option is checked/enabled?

I get more brightness when I'm plugged into the AC adapter and have "slightly dim ..." enabled. But I'm on a Unibody MBP, so maybe that differs now.

 

When I have slightly dim checked, all it does is put the brightness down to about half on battery. However, you can push it back up to max with the keyboard or sys prefs.

 

Ah, I see. I never noticed it. Maybe some time ago, but I have already forgotten about it.

That clears things up and should also help the OP.

 

That 'extra level of brightness' won't go past the actual max screen brightness.

If you're on battery and have your screen at anything much lower than full brightness, you'll see a brightness jump when you plug it in.

If you're already at full brightness when you plug it in you won't see anything because your screen is already at its true maximum brightness. There's no magic or trickery involved.

 

That's what I think OP is getting confused. I think he believed that there was because the brightness was already high and when he unplugged the MagSafe, it automatically adjusted the display for him and when he connected it again, it went back up. There is no other option than what you can control.

 

Bottom line that is not understood, apparently:

The highest notch of brightness is the highest notch of brightness. It cannot go higher than that. If you are running on battery, and you adjust the brightness to the highest notch, then plug up the MagSafe, it will not get brighter, because it is already at the highest setting.
If it is not at the highest setting and you plug it in, it will raise the brightness.

There isn't a "special" extra notch of brightness for running off of AC. The highest notch is as high as it'll go.

 

Thank you.