Bizarre dimming screen on new Penryn MBP?

[emsemerald]

Has anyone else noticed that the screen dims somewhat periodically for no apparent reason? I'm not sure if there's something wrong, or if this is some new backlit screen thing. I thought at first that I was imagining things, but it keeps happening. Any ideas?

 

[pompadork]

Do you mean after short periods of inactivity?

 

[txcdcky]

I'm pretty sure it automatically dims or brightens depending on the rooms light source, any small change in the light or perhaps shadows passing over the sensors activate the screen adjustment.

 

[tilman]

Has anyone else noticed that the screen dims somewhat periodically for no apparent reason? I'm not sure if there's something wrong, or if this is some new backlit screen thing. I thought at first that I was imagining things, but it keeps happening. Any ideas?

That's a preference, under Preferences -> Display -> Options, "Automatically reduce the brightness of the display before display sleep". It's trying to tell you that it's about to go to sleep.

 

[triforcer]

the light sensors are hidden in the speakers, put your hands over the speakers to check out the dimming effect. it also lights up your keys too.

 

[jiholl]

I just got new one also and noticed the same thing...I went to preferences-displays (not energy saver) and unchecked the auto dim in light conditions thing...and have not noticed it since then.

 

[pianoplayer1]

Yea if you type with your hands over the speakers or just rest your hands there it will dim the screen unless you turn off the preference.

 

[emsemerald]

Wow. I guess I just had my hands over the sensor. Thanks!