Mac Pro :: Unable To Adjust Screen Brightness / Only Adjusts Brightness On Main Screen
Feb 17, 2008
I have dual ACD's. How do I make it so that both screens have the same brightness? If I adjust the brightness in the display settings it adjusts the main screen, but then not the other one. How do I make them the same?
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Jun 20, 2009
So I installed Vista 64 bit on my Macbook Pro (Santa Rosa), I installed most of the drivers I can find, but I cant get the screen brightness buttons to work (F1 and F2)
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Nov 15, 2010
The brightness goes up when you plug in your MBA, but then over time it just goes up and up. I honestly like my brightness pretty low (rarely more than half, typically at 3-5 notches), but it just keeps on going up and up. I almost never set it above half, but multiple times a day, I notice that it looks pretty high and it's at like 3/4 so I put it it down to about 1/3, but after a while, it's just up again.
Anyone else notice this? What is it, why does it do this? How can I fix it? I don't mind not having auto-brightness (even though I loved it), as long as my screen doesn't keep going up.
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Jun 29, 2009
Just bought a brand new 15" MBP, and immediately after unboxing the screen brightness seems to just move/adjust without adjusting via brightness buttons.
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Aug 25, 2009
After every reboot, the brightness of my iMac's screen changes to 100% brightness, which is slightly annoying. Does anyone know why this happens? By the way, I'd say it does it since 10.5.8.
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Oct 21, 2010
Does the new MBA still have the ambient light sensor that adjust the screen brightness to environment?(like the older MBA and the current MBP)
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Nov 28, 2010
I have the 21" iMac and need to brighten the screen. How do I do this?
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Apr 26, 2012
I have a Macbook Pro 13.3 ", only a few months old. When I use this, whether I use the word, web surfing etc then adjust the brightness of the screen itself from strong to weak and back, all the time. This happens both when connected power and do not. And no, it's not that it goes into power saving mode, this occurs during use.
Info:
MacBook Pro
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Jul 23, 2010
All of a sudden, every time I reboot, my screen's brightness is all the way up. So, I go to 'Preferences' and bring it down to only happen again the next time I reboot. Not a terrible problem, I hope, but not sure why the settings of this doesn't remain as I left it last. Perhaps I have picked up something OR I have a fault which could get worse?Anyone seen anything like this?
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Oct 14, 2010
I've got a 2010 i7 15.4 MBP, after installing boot camp drivers from MAC OS DVD, I could not find any option about how long to dim screen brightness. However, my friend's 13.3 MBP does have. What about yours, guys?
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Mar 12, 2008
I cannot control my screen brightness using the F5 and F8 keys. The only way I can adjust it is through System Preferences. I tried just F5 fn F5, Control F5, Option F5 and Command F5 and non work.
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Jun 15, 2009
Has anyone noticed a very slight flicker on their new MBPs? I have a new 13" and, every so often, the screen brightness dims and then brightens very quickly (happens in less than a second).The option for auto-adjusting the screen brightness is off so it's not that particular function.It's most noticeable on all-white backgrounds both on AC and battery power. Hard drive access doesn't seem to coincide with the dimming.
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Jan 19, 2009
lately, my mba has been behaving a little weirdly. its screen would suddenly become a little dimmer when the brightness in the room has not changed a bit. after a long while(15 min?), it'll turn brighter again by itself, and again without any change in the lighting of the room. the change is not big but obviously. any idea? can it be some software? or setting? or a defective light sensor?
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Dec 22, 2009
I have a 2007 aluminium imac running Snow Leopard. It needed to have a disk drive replacement recently under applecare. Since I got it back I have noticed a marked dimness in screen brightness starting about halfway down the screen, most noticeable against a window with a white background. It is pristine white at the top of the window but from about halfway begins to get dimmer. Its a bit like being in sunlight and the coming into shadow, or finding mist creeping into the picture.
I have tried recalibrating it but it makes no difference. It might have been there before the repair but if it was I didn't notice it or else I grew used to it but now I find it quite distracting and it does make text a little harder to read as I'm getting on in years and my sight needs all the light it can get. Is it normal or is it a sign of problems beginning to manifest themselves with the display? I wouldn't like to ignore it & find myself out of applecare cover when it does.
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Jun 1, 2008
So I have noticed a few times already, that the screen on my white macbook flickers to change the brightness level. It can do this while the computer is plugged in and charging, or if it's off the charger. It is definitely noticeable as it causes me to just watch what the screen is doing.
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Feb 28, 2009
I found the setting under Displays to automatically adjust brightness, but is there a way to set this different for Battery or Power Adapter? I would like to keep this option on for using the Battery, but would like the display at a constant level when using the Power Adapter.
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Apr 2, 2007
The screen on my MacBook will randomly adjust brightness or sometimes flicker.Does anyone else have this problem or know how to fix it?
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Jun 11, 2012
I have an iMac, the screen has gone quite dark (as if in sleep mode) I have to sit in a darkened room to see it properly. Have I hit the wrong key or key combination of keys? How do I adjust the brightness?
Info:
iMac, Mac OS X (10.4.11)
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Jun 18, 2009
So I have an AVI file that won't even load in quicktime, but it plays fine in VLC and MPlayer. As far as I can tell neither of these programs let you adjust the color, contrast or brightness of the file. Does anyone know of a program that will allow me to do this?
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Jan 28, 2010
I have recently put windows 7 professional on my aluminum macbook, installed all the drivers, and so forth. I hook up my macbook up to an external monitor, and use a logitech dinovo keyboard for a mac. However, when I am in windows 7, the function keys do not adjust volume, brightness, and any other of the functions.
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Sep 15, 2007
I just got a new 15" MBP and it keeps changing the screen brightness by a couple notches either way on it's own. Anyone have/heard of this problem?
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Mar 4, 2008
My MacBook's screen is pretty dim, even at full brightness. The iPod Touch far outshines it and even a Sony PSP is brighter.
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Aug 10, 2008
I usually have my screen brightness set to a few ticks above the lowest, but when my screen shuts off (after 3 mins or whatever I have it set to in the control panel) and gets turned on again, the brightness is set to max. If I then drop the brightness by one tick, it drops to where it was set before. It doesn't do this when I close the lid but it does go to full brightness when I restart the computer and as I enter the windows desktop it goes back to what it was set at.
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Aug 7, 2009
Am I the only one having this bug? I have a 2009 24" iMac Radeon 4850 and after installing the 10.5.8 combo every time the machine boots the brightness is set to maximum.
I tried zapping the PRAM and that didn't help.
The other problem I noticed is that my startup network shares, even though checked to "hide" pop up finder windows at boot time. It never did this before (even without hide being checked).
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Oct 10, 2009
Recently, after about 5 minutes of use (not sitting idle), my MacBook's screen will go very dim. I hit the buttons on the keyboard to take the brightness all the way up, but it doesn't get much brighter and there's only one thing that I can do to make the screen go brighter: I go into System Preferences and click Display. The second I click that, the brightness returns without me doing anything in the Display section, so after Display comes up, I just close it out and the screen brightness is fine for a while. It seems to do this after the lid has been closed for a while and then starts dimming again after opening the lid and using it for about 5 minutes. Is there a way to fix the auto-dim mode without disabling it? MacBook (white) is running Leopard 10.5.8 with all the latest updates.
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Nov 11, 2009
I am using a Samsung monitor so therefore cannot control th screen brightness with the F1 F2 keys.
I tried Shades but it messes with the colour making it look a little washed out and not good.
Are there any others I could try ?
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Apr 7, 2010
I dropped my laptop on a tile floor and the bottom hit it flat. my computer works fine besides the fact that my computer screen's brightness is as if my brightness level was all the way down.
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Jun 2, 2010
I find it you have to or it will be too dark.
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Apr 19, 2012
Purchased my iMac 27" back in October 2011. It was fine up until around February this year until my screen brightness started flickering automatically. I have the ambient/auto brightness setting switched off and after many discussions with apple care on the phone I have been advised to bring my iMac back in to the store.
1) is this a common problem a lot of people have experienced with iMacs?
2) Do you think it will be repaired or replaced?
3) Does this happen with the macbook airs as I was planning to purchase one for university in September, however if this problem occurs with their laptop range then I will opt for windows.
Info:
iMac, Mac OS X (10.7.3)
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Jul 1, 2012
I wanted to check out Windows 8 so i decided to install it using Bootcamp on my Macbook Pro. I installed it successfuly, along with the Windows Bootcamp drivers, but my Display is VERY dim, the brightness is all the way up to the Mac. I rebooted the Macbook Pro and ran OSX and the brightness is fine, but on windows is very very dim and idk how to fix it.
Info:
MacBook Pro, Mac OS X (10.7.4)
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