MacBook Pro :: Screen Flickers Black For Short Moment On Switching Graphics

May 9, 2010

I just got a new MBP i7, and whenever the graphics switch from the Nvidia 330m chip to the Intel chip, the screen "flickers" black for a short moment before reappearing. Can anyone with a new MBP comment on this behavior? It doesn't happen on the switch from Intel->Nvidia, just the other way around.

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PowerPC :: Load Up The Blue Screen With The Apple Logo, But Then The Screen Goes Black Or Flickers?

Feb 4, 2008

I am looking at purchasing an Ibook G4 but the description of the item includes this:"When you switch it on it begins to load up i.e. the blue screen with the Apple logo, but then the screen goes black or flickers. Said friend has kindly wiped the hard drive for me so now when you switch it on it makes the �opening� noise then you get a blue screen with alternating �?� and the Finder logo."

I have a feeling this may have been a temporary fault with the screen connector being loose and possibly damaged.But i assume the alternating "?" and the "finder logo" is simply a lack of OS?

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Mac Mini :: Screen Goes Black And Flickers

Apr 12, 2012

I just bought mac mini few weeks ago everything is great apart from every now and the the screen goes black for a second.

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Intel Mac :: Screen Goes Black For Short Periods And Increase The Time It Fails?

Jul 4, 2012

imac screen goes black 27, still works but the screen goes black for short periods and increase the time it fails. Info: iMac (27-inch Mid 2011), Mac OS X (10.6.8), IS iMac (27-inch, Mid 2010)

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Intel Mac :: Screen Goes Black After Screensaver And When Switching Desktops?

Apr 21, 2012

screen goes black after screensaver and when switching desktops? [URL]

iMac, Mac OS X (10.7.3)

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IMac :: Black Smudges On Screen / Switching Between The Hard Drives?

Oct 26, 2009

I have had my iMac for about 4 months, i have been using it as my main desktop since. I have noticed black smudges, kinda like finger prints on the screen that would not go away after cleaning it with a damp cloth. I removed the glass panel and cleaned inside the glass and the problem still remained.

This is not the main issue, i can live it with. I have two iMacs with the same specs, one is in my main home office that i used most of the time while the other is my home that i use not that much. The smudges does annoy me when i watch movies a little bit but its not enough to get me to replace my mac. I was thinking since i used my office iMac more is it possible to switch the hard drives on them so that i get all the info from my office iMac onto my home iMac without complications?

Since i dont use the home iMac as much as the office one i can tolerate a few black smudges more and i would have an iMac in the office that looked new.If i switch the hard drives will it be as if i switch macs and if anyones knows how to fix the black smudges it would be a great help.

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Applications :: MacBook Starting To Blink Black Screen After Snow Leopard Graphics Update

Aug 23, 2010

Every once and a while, usually when my MacBook is running on it's battery, the screen will show a black screen for nearly only a millisecond or two. It's not too bothersome, and it usually blinks back to normal before I can notice it, but nevertheless I don't want it, and from what I can recall, this only started happening after I installed the Snow Leopard Graphics Update. Is anybody else getting these problems on their MBPs or MBs? MacBook config details in my sig.

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MacBook Pro :: Not Booting Up - Screen Flashes For A Moment And Then It Dies Again

Jun 5, 2014

MBP not booting up?  I press the on button and the screen flashes for a moment and then it dies again...  once I actually got it to some screen that said  HD  and Restore but when I clicked on HD it died immediately again... 

MacBook Pro, OS X Mavericks (10.9.3), iPhone 5 Verizon

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Power Mac G5 :: Distorted Graphics And Screen Go Black

Dec 11, 2007

After the 10.5.1 software I'm having a problem with distorted (stripes etc.) icons and menu dropdowns. Apparently not on my desktop or programs like Safari, Mail etc., only on icons and menu dropdowns, which I find odd. Sometimes it's gone, but after some time it reappears again. Anyway, sometimes my Mac (iMac G5, PowerMac12,1, 1.9 GHz) is going bonkers completely, which results in a first pink, then black screen. A hard shut down is then the only option. However, I guess it's videocard related (ATI Radeon X600 Pro). I did all the tests, fixes you can think of, but without any results. I contacted Apple support, but because this is an iMac, you can't just replace the card, they told me that the whole motherboard should be replaced, which will cost me approx. 700 EURO. Of course I am not willing to do that, which means that I'll have to buy a new Mac. Of course a new Mac is always a delight, but I find replacement after just 2 years unacceptable.

iMac G5 PowerMac12,1
Mac OS X (10.5.1)

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IMac :: 20 Alu - Black Screen - Graphics Card (HD2600) Failure?

Mar 19, 2010

I installed USB Overdrive (a program), I clicked on restart and my iMac never got up. When I start it, the HDD and fans do work. But there is no boot sound, and when I change sound levels, I cannot hear it. I think, it never makes it to OSX. It does not load the OS. I dont think it is Graphics card (HD2600) failure.

When I try to reset PRAM, nothing happens. Usually I must hear it restart again with loud boot sound but it never happens. Also my keyboard does not seem to work, as the CAPSLOCK button does not light up, when pressed. I changed RAM to different moduls, still the same. I checked the iMac RAM on a different computer, it works. Maybe USB Overdrive killed the USB slots? As my USB keyboard does not seem to work

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Power Mac :: Random Black Screen - Is It Monitor Or Graphics Card?

Mar 21, 2012

Do not want a nuisance to escalate into a serious problem thru benign neglect. Random black screen -- Turn monitor off then on, and all comes back fine. No loss of power in machine, no fan quirks, no overheating. Is it the Monitor? or the graphics card?

PowerMac, Mac OS X (10.5.8), 6GB DDR2 SDRAM

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MacBook Pro :: 13" Graphics (blue Bar Flickers White And Blue Very Quickly And Almost Unnoticeable)?

Aug 7, 2009

After a few minutes of rebooting the machine i will use spotlight and it will be very flickery. Like when updating results, the blue bar flickers white and blue very quickly and almost unnoticeable. Also, related, when scrolling a list in the dock through a stack shown in list mode, it flickers a lot there as well. Is this normal behaviour for these machines/leopard in general? I'm used to using a crappy old iBook so i dont know if im just being pedantic.

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Why Does MacBook Pro Have Graphics Switching

Apr 10, 2012

I was looking through tech specs of the 15 and 17 inch macbook pros and comparing them to iMacs, so i was wondering why they did that? Is the graphics better on the macbook pro?

MacBook Pro, Mac OS X (10.7.3)

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OS X :: Graphics Card Not Picked Up By Hardware Test / Parts Of Screen Starts Going Black

Apr 15, 2010

I've got a 2007 Macbook Pro. It's on its second graphics card (8600M GT), the first one failed on me a year ago. OS X 10.5.7, all firmware updates installed.

I think I have a new graphics card issue, but I can't prove it. In Front Row, after 10-20 minutes, often parts of the screen will start going black. Then it freezes. Sound works fine. It doesn't look like the same kind of wild distortion that I got when my GPU failed the first time, though, it just looks like things have been rendered incorrectly.

When Front Row finally quits, I've had black and white bars across my menu bar a couple of times. Once the computer then totally locked up and I had to reboot.

In Windows XP in boot camp, things are worse. I only use boot camp for games, since they use a lot of graphical power, it made sense that the problems happen there more often. After 15-20 minutes, the screen will start stuttering, then the keyboard/mouse will stop responding. The sound will hiccup a few times too. That lasts about 10 seconds, then everything returns to normal for a while (as little as 10 seconds, or as long as 5 minutes.)

The Apple Hardware Test (short and extended) shows no trouble. Techtool Pro shows no trouble. I ran the very thorough memtest86+, and it showed no memory trouble.

Can anybody give me any tips on definitively diagnosing this problem? Is there any kind of really intensive hardware test I can get (a live CD maybe)?

Second question, has anybody heard of Apple replacing a laptop that has had many faults with a brand new unit?

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MacBook Pro :: Graphics Switching In Windows?

Sep 7, 2010

The title is pretty simple, and self explanatory. Will the HD Graphics/330M combo, or the 9400M/9600M GT ever be able to switch back and forth in Windows? And regardless of if it's possible, what is the limitation, drivers, other software, or a physical hardware limitation? It would be a nice way to get more battery life out of Bootcamp.

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MacBook Pro :: Graphics Card Not Switching?

Feb 5, 2012

I have a MacBook Pro 15" 2.66 GHz Intel Core i7 (Mid-2010). I have auto graphics  switching turned on in the Energy Saver prefs. But it never switches. It stays on the nVidia card all the time. 

I have tried switching to Text Edit, Mail, BBEdit, and other non-graphics intensive apps. It stays on nVidia. It stays on nVidia even when I unplug and use battery power. 

I can manually change it to Intel, and it works fine. When I change it back to auto switching, it stays on nVidia continuously. 

MacBook Pro 15, Mac OS X (10.6.7), 2.66 GHz Intel Core i7 (Mid 2010)

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MacBook Pro :: Not Switching To Discrete (AMD) Graphics

Jun 25, 2014

MPBr, 15", Early 2013 with dual graphics (Intel HD Graphics and AMD Radeon)

Running Maverics 10.9.3 

What is happening:

1. Machine doesn't switch to AMD graphics no matter whatever app is running. In activity monitor even if some apps say "Requires High Perf GPU", the graphics card being used is still "Integrated".

2. Connecting to an external display via thunderbolt or HDMI doesn't work (external display doesn't turn on) either as it required discrete graphics too.

3. After a reboot (at what time I believe machine tries to use discrete graphics card), the display is always blank. Even the Apple logo on back of lid is turned off. Only way to get the display back is to close the lid and open it after 10 ~ 15 seconds at which time it probably switch back to integrated and comes alive. 

What I have tried:

1. Reset PRAM.
2. Reset SMC.
3. Tried gfxCardStatus [URL] to no avail. If I manually switch to discrete card, gfxCardStatus checkmark say it has switched, but it doesn't.
4. Tried booting into hardware diagnosis (pressing D while booting) but was unable to get the screen turned on to proceed. 

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MacBook Pro :: Auto Graphics Switching - Delay?

Nov 4, 2010

Does anybody experience any delays with the auto graphics switching on the late 2010 MBPs? I mean serious delays? Mine seems to be very slow at making the switch. Say if I open a PDF that has a load of images in and start to scroll at high speed to scan the document, everything becomes very stuttery. Then, after a while (very random in how long it takes) everything starts to get smoother, when I assume the NVIDIA kicks in. I thought this was meant to be more-or-less instantaneous?

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MacBook Pro :: Switching Graphics Cards Without Logout Possible?

Aug 20, 2009

My primary concern is whether or not uMBP users will ever be able to switch the graphics cards without logging out every time? I remember hearing that it was a software issue, does that mean that it might be supported in Snow Leopard?

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MacBook Pro :: Graphics Switching Without Restarting Windowserver?

Apr 14, 2010

Obviously the new Macbook Pros do not require a reboot to switch between graphics cards while the previous generation, the one which had two graphics cards made by the same company, requires a login/logout. The case made for the necessity of this login/logout has been the need for the WindowServer process to be relaunched, and to overcome this, WindowServer would need to be rewritten. Obviously that didn't happen. Further, if random Nvidia insiders are to be believed, this wasn't done using Optimus technology by Nvidia, but rather by Apple... so. How do you suppose they pulled that off?

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MacBook Pro :: Automatic Graphics Switching On Battery?

May 7, 2010

is there any way to only use automatic graphics switching when on battery?i want to use switching when on battery, but only use nvidia when using the power brick.

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MacBook Pro :: Using External Displays And Graphics Switching?

Jun 7, 2010

I just plugged in my Cinema Display to my MBP for the first time, and for a while couldn't figure out why the heck the computer wasn't recognizing it (though maybe I'd gotten a bad MDP/DVI adaptor).

Then I'd noticed I'd set it via gfxCardStatus to use Intel graphics only. I released it to Dynamic -- and voila! Display recognized. Interestingly, it now also will not accept being set back to Intel only with the monitor connected.

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MacBook Pro :: Flickering White Screen / Screen Flickers Sometime

Jan 28, 2010

My screen just started to occasionally have a flicker of a white line show up...It doesn't happen that often, should i worry? Is it worth taking it into apple? (Under warranty still) Since its not consistent i wont necessarily be able to show them what its doing..

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MacBook Pro :: Graphics Not Switching To Intel Hard Drive

Jan 6, 2011

I purchased a Macbook Pro 15" i7 last month, and since doing the migration (using the migration utility) from my old black macbook my graphics are stuck on the Nvidia graphics and is not switching to the Intel HD graphics. This is eating battery power like no tomorrow.

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MacBook Pro :: Graphics Processor Switching Snow Leopard?

Aug 30, 2009

Where do I switch graphic processors in Snow Leopard on my late '08 uniMBP?

It used to be in the "Energy Saver" area but, I had to log out and then back in again to activate the change. Is there something I'm missing here?

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MacBook Pro :: Why Does The Automatic Graphics Switching Turn Itself Back On

Jun 21, 2012

I have a late-2010 Macbook Pro 15" and have been having issues with gaming.  Specifically, the games will freeze the system requiring a reboot.  After reading further, I learned about the "Automatic Graphics Switching" mode under "Energy Saver" in the System Preferences screen.  Upon disabling this setting, and locking the preferences, the games are still freezing.   

I have not re-enabled this setting but when I check the settings again it is enabled.  Seemingly, the OS is changing the "Automatic Graphics Switching" on its own. 

MacBook Pro, Mac OS X (10.7.4)

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MacBook Pro :: How To Avoid Switching To Integrated Graphics Card

Jun 27, 2012

See the new Macbook Pro that I recently got has two graphics cards. One, the integrated, standard issue Intel HD4000 and the other one, a Nvidea GT650M. Personally, I was thrilled to learn this. However, my Macbook Pro seems to switch in between these two and I really don't want it to do that. I would rather just make the GT 650M the main graphics card and avoid using the integrated graphics.

MacBook Pro, Mac OS X (10.7.4)

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MacBook :: Screen Flickers During Start Up?

May 8, 2009

everytime when i turn on my macbook, the top part of the screen flickers.. I don't recall seeing that happen when i first got my macbook. anyone else have the same issue? something i should worry?

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MacBook Pro :: Automatic Graphics Chips Switching - Extended Battery Life

Apr 13, 2010

the new machines will switch between graphics chips. all very nice (at last), but my 15" MBP 2.8 doesn't and it's a real pain for me as I often go between apps than need the extra speed and then back to e.g. Word, and could really do with the extended battery life (I have the old style battery pack) any news if the older graphics systems can be worked to switch on the fly...i.e. without having to logout and shut down all the open apps, and work?

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MacBook Pro :: Stop Automatic Graphics Switching Setting Automatically Reverting

Jun 25, 2012

Macbook Pro 15" Mid 2010

OS X 10.7.4 

I have a recurring problem where my screen (built in or external monitor/projector) will just go blank at random times. It is an unrecoverable situation and I have to do a hard power reset to get working again.

After testing several theories without success I struck upon one that showed promise. The blanking tended to occur when I was in Lion Fullscreen mode, or using a gesture to start expose - so I figured maybe it was a graphics switching issue.

So I went into System Preferences and disabled 'Automatic graphics switching'. I then ran trouble free for several days (I was typically crashing 1-2 times a day)

Then several days later it happened again and I thought I was back to square one. However, a colleague suggested I check the graphic switching setting to see if something had changed it back, and sure enough it was re-enabled.

Now I find myself in a constant battle with the system to keep disabling the 'Automatic graphics switrhing' in System Preferences.

I have tried setting it and locking it, but sooner or later it reverts. I need to know if it is possible to force it to stay disabled.

MacBook Pro (15-inch Mid 2010), Mac OS X (10.7.4)

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