annoying macbook 30 second auto dimming help

hvatsun

macrumors newbie
Original poster
Aug 3, 2006
7
0
hey there. I HATE that dimming of the screen that the macbook does once it is idle after about thirty seconds. It really disrupts watching videos online, and i can not figure out how to turn it off. can anyone help me? thanks!
 

Smoothie

macrumors 6502a
Jun 23, 2007
595
307
California
After looking into this a few weeks ago, I found posts that described this as a bug in the OS. Even if you've disabled auto dimming in the power settings, it will occur the next time you reboot. The only way to fix this is to go into the power settings, check the box for auto dimming and then uncheck it. You'll need to do this each time you reboot.
 

GimmeSlack12

macrumors 603
Apr 29, 2005
5,395
8
San Francisco
After looking into this a few weeks ago, I found posts that described this as a bug in the OS. Even if you've disabled auto dimming in the power settings, it will occur the next time you reboot. The only way to fix this is to go into the power settings, check the box for auto dimming and then uncheck it. You'll need to do this each time you reboot.
I disagree with this. As this only happens to me when I'm on battery only. And even then I can simply go check the box in the Energy Savings. Of course I am only one man in a sea of inevitable exceptions.
 

iW00t

macrumors 68040
Nov 7, 2006
3,286
0
Defenders of Apple Guild
After looking into this a few weeks ago, I found posts that described this as a bug in the OS. Even if you've disabled auto dimming in the power settings, it will occur the next time you reboot. The only way to fix this is to go into the power settings, check the box for auto dimming and then uncheck it. You'll need to do this each time you reboot.
Are you sure?

*checks power settings*

Nope, not true. Never happens for me.
 

zephead

macrumors 68000
Apr 27, 2006
1,573
3
in your pants
There's a little trick you have to do in Terminal: If you type pmset -g disk, you'll see that halfdim is set to 1 for both battery and AC power. Now, to disable the dimming, type sudo pmset -a halfdim 0 and type your password to disable the display dim. The -a (all) says to apply it across the board, -b is for battery, and -c is for charger (AC adapter).
 

zephead

macrumors 68000
Apr 27, 2006
1,573
3
in your pants
To add to my previous post, that Terminal command works restart after restart. Just type it and forget it, and your display isn't gonna dim.
 

fltsdsurf

macrumors newbie
May 2, 2008
1
0
Zephead's answer worked to perfection. I didn't set set everything to 0, just the charger. Thanks mang.