MacBook :: Screen Changes Brightness Randomly / Screen Suddenly Become Little Dimmer
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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May 14, 2012
1. Screen Brightness is on. Desktop functioning as normal, according to the brightness set.
2. Randomly, the entire screen brightness will switch 'off' - but not go to sleep - it is set at the brightness level, as if you would have turned it all the way down manually. Automatically, my screen goes from:
3. After clicking the brightness button on the screen - when I look closely - the brightness control is set at its previous level, but the screen is not at that brightness! darkest screen (above, right) + brightness settings up
4. In order to solve the issue, I have to hold down the minimize brightness button and then turn it back up, from the lowest setting. This only works about one in five times. All other times, the screen briefly flashes and then goes dark again.
Info:
MacBook, Mac OS X (10.5.8)
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Jul 8, 2008
I've noticed recently that my screen brightness will suddenly increase or decrease by itself. When I press one of the control buttons it indicates that it is 3 or 4 steps higher or lower (obviously allowing for the fact that pressing a control button moves you one step anyway!) I have the 1.8 SDD. I love the machine....but anyone have any ideas about this. It only happens under battery power.
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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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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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Sep 3, 2008
Towards the lower right hand side of my monitor there is a series of pixels that are dimmer than all the rest. It forms basically a backwards J. It is most obvious when there is a white background (like on this site). Is this something that would be covered with Apple Care?
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Apr 6, 2007
I finally realized that I'm not crazy and my screen -does- look dimmer than normal. I checked the "Automatically dim for this power source setting" thing and the issue is not that. At the login prompt screen, everything is nice and bright, but the screen will dim to maybe 80% of that brightness once I log into any user.
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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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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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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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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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Mar 27, 2009
i had the macbook Core 2 Duo for About 8 months and it was working great.
yesterday i left a file download in firefox for 5 hours then went back to check on it , it was working FINE, Then i got Back after 2 minutes and the screen is suddenly white and not showing anything i shut down the laptop and restarted , there was a chime and just white screen...i connected the laptop to an external monitor AND EVERYTHING IS WORKING on the external screen but the laptop screen is white!
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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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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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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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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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Feb 10, 2008
When I push the brightness key on the keyboard, the appropriate image comes up on screen and goes to full brightness, but the actual brightness of the screen doesn't change and the lack of change is reflected correctly on the brightness slider in System Preferences.
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Mar 28, 2008
I have a first generation macbook pro and it appears as though the screen is not as bright as it once was.
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Jan 19, 2009
I am just wondering if there is a way to have a brightness preset for when the macbook is plugged into the wall and running on battery?Eg. When plugged in I want 100% prightness, but when running off battery it automatically lowers the brightness.Right now I manually lower it and some times forget.. especially times when I need that extra bit of battery power
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Mar 22, 2009
I have the aluminum MacBook (<3) and it is often found on my desk, in front of my aluminum desk lamp. I was writing a paper and had one hand on my touchpad and touched my (off, but plugged in) light with my other hand. My screen dimmed just a little bit, approx the brightness between the two highest lighting levels. Even when not touching my touchpad, just touching my light, my screen did the same thing. Depending on WHERE on the lamp I touch, it affects the brightness... but only on the bell surrounding the light bulb, no other components of the light.
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Jun 24, 2009
I don't know if anyone posted this issue before. I can not control screen Brightness on my MBP 13'. I tried my F1 and F2 key and the Nvidia Control Panel, either of them is working. I installed all the drivers from the CD and it can actually show the icon in the center(bottom) of the screen when I hit the F1 or F2 Key. However, the brightness adjust does not work,the screen stay the same.
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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 31, 2009
I have a macbook and a screen plugget to it. Now I use just the new screen and don't use the macbook one. But every time I turn the mac on the macbook screen turns on, and I have to decrease the brightness manually every time. (cause it's a waste of energy to keep it on if I don't use it). So I'd like to know to set the screen brightness to 0 by default, so I don't have to turn the brightness down every time.
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Sep 29, 2009
(Electricity as in AC power.) I've been using the brightness controls (F keys) to turn off the screen at night and leave my computer running. I just assumed it uses less AC power that way and I'm saving some electricity but I don't know a lot about electricals to confirm my theory. Does anyone know?
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Nov 23, 2009
I've been wearing contacts all my life in order to get 20/20 vision. And until last week I always had to have my brightness on the highest setting while I was at the office with fairly bright overhead lighting. While using the computer at home with the lights off/dim, I still had to have the brightness set to 4 bars shy of the brightest setting in order to see everything properly. And I never understood when I would see people on here saying they had their brightness set to the lowest settings and it was plenty bright for them to see. Last friday I had LASIK done.
And since the surgery I now have 20/15 vision in both eyes, which was expected. But one thing I did not expect was the difference in brightness. Now in the same office setting I have the brightness set to 40-50% brightness and it's still almost to bright. And at home I set the brightness level to 1 bar and it's more than enough to see every detail on the screen. In fact, I now wish there was a lower brightness setting than the lowest bar. The best part is that, while running on battery, I can now get another 30-40 minutes out of usage with the brightness set so much lower. Now if I could just figure out how to get my volume to not jump to 70% when I plug my headphones in I would be very pleased.
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Jan 17, 2010
So today my screen has been acting up on me, it keeps lowering and raising the brightness all on its own. The brightness indicator that pops up when you push the buttons does not show up, the screen just gets brighter or dimmer for a few (10-30 seconds) then goes back to where I have it set at. My battery level is at 64% and it is not plugged in.
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Apr 1, 2010
I downloaded the latest software update for Leopard. I've noticed that when I wake my MBP from sleep, the brightness of the screen is very low. I have to click on "F2" to increase the brightness of my screen.
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