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Help!!! my screen brightness cannot be adjusted

elisha cuthbert

elisha cuthbert

macrumors 6502a
Original poster
Feb 25, 2006
665
0
Melbourne
OK so i was using my laptop and wanted a little more kickout of the screen so i tried to turn the brightness up and i can no matter how i try with the keys it wont work and there is no other way to do it (that i know of)
can someone please help me with this problem.
also the screen doesnot get lighter or darker when i connect or disconnect the power
 
hm, maybe trash the .plist file in library - preferences - sysyem configuraton and either preferences, or power managment though im not sure if eaither of these would be the problem Have someone else second this before you do anything.
 
EricNau said:
Do you have an external screen attached?
Click to expand...

nope im just using the iBook screen

fivetoadsloth said:
hm, maybe trash the .plist file in library - preferences - sysyem configuraton and either preferences, or power managment though im not sure if eaither of these would be the problem Have someone else second this before you do anything.
Click to expand...
ok i shall wait for a couple more replys before i do this, and add it to the "if all else fails" pile
 
system preferences - displays - display

under the box of resolutions should be a slider (its not under the colour tab on my Mac)

also I know its a hated question by some people but have you repaired permissions, run cron scripts etc
 
Chappers said:
system preferences - displays - display

under the box of resolutions should be a slider (its not under the colour tab on my Mac)

also I know its a hated question by some people but have you repaired permissions, run cron scripts etc
Click to expand...

tried all , but there is still no slider in the display tab or the colour tab.....
also there is only one resolution to select and its the default 1024 x 768 and there is no 800 x 600 or anything else

so if anyone knows how to fix this please help
 
elisha cuthbert said:
ok i shall wait for a couple more replys before i do this, and add it to the "if all else fails" pile
Click to expand...

I don't know if trashing the prefs will solve the problem or not but you don't need to wait for a couple of days, it's not a big deal. You system will just make a new pref file as soon as you try to modify it. You are not trashing anything important. If it makes you feel more secure just drag it to your desktop then if the problem is not solved you can put it back if you want.
 
dogbone said:
I don't know if trashing the prefs will solve the problem or not but you don't need to wait for a couple of days, it's not a big deal. You system will just make a new pref file as soon as you try to modify it. You are not trashing anything important. If it makes you feel more secure just drag it to your desktop then if the problem is not solved you can put it back if you want.
Click to expand...

didnt work
 
What is different from these photos on your preference pane?
 

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dogbone said:
How about if you log out and log in to your spare admin user account, and check it there. If you don't have a spare admin user account then you should make one.
Click to expand...
i shall log in as root in a minute im just finishing converting a couple of songs

EDIT: its not any different in the root user
also its not asif the volume adjustment keys dont work its just the brightness ones
pseudobrit said:
What is different from these photos on your preference pane?
Click to expand...

refer to attachment
 

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I don't use my iBook much these days, but I recall that the screen is slightly dimmer when running on battery power than when plugged in, even with the brightness all the way up. I imagine this doesn't help you much but who knows.... Maybe check your energy saver prefs?
 
Poeben said:
I don't use my iBook much these days, but I recall that the screen is slightly dimmer when running on battery power than when plugged in, even with the brightness all the way up. I imagine this doesn't help you much but who knows.... Maybe check your energy saver prefs?
Click to expand...

checked, it does dimm when its been idle for a bit but does not change when i plug in or remove the power cord
 
quick question

Hi guys, just a quick question: whenever I try to modify something on system preferences -> energy saver (something like the "automatically reduce the brightenss of the disbplay before sleep") my changes go back t the original defaults and tu a "custom" energy mode. Is there any option I have to uncheck to make sure I can customize everything and keep it as I want it? thx!!!
 
This is a long shot, but is the Shift key stuck? This will cause the computer "safe boot" and you won't be able to adjust the brightness.
 
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