Bootcamp External Monitor / Dual Monitor Problem (Windows 7 64 bit)

Discussion in 'Windows, Linux & Others on the Mac' started by ninjamoby, May 27, 2011.

  1. ninjamoby macrumors newbie

    Dec 6, 2008
    Hi all-

    Late 2008 15" MBP with 9600M GT.

    I set up my dual monitors in Windows 7 (external display via minidisplay to DVI adapter), then turned off the LCD screen and defaulted to the external display only.

    However my external display is not giving me any picture now - even though it is detected over the minisplay. The display works fine when connected to another system.

    If I plug in the Minidisplay, my LCD screen turns off so I have no way of trouble-shooting the issue via the NVidia Control panel (ie: I can't turn back on the dual display without the Minidisplay connected, but can't see anything when it is connected).

    I hope that was clear. Does anyone have an idea what's going on here and how to resolve?
  2. captain-cobs macrumors newbie

    May 30, 2011

    When you're running it without the mini-displayport connector plugged in, download and install a VNC server to the computer. I use TightVNC. Then, when you plug your connector in, use another machine (or a phone with a VNC client on it) to control your computer remotely, giving you access to the Nvidia Control Panel to troubleshoot.

    Hope that helps!
  3. ninjamoby thread starter macrumors newbie

    Dec 6, 2008
    Thanks for your response.

    Oddly enough if I use the Mini-Display to VGA connector the image works, just not Mini-Display to DVI (which works in OSX but not Windows).

    Could also be an issue with the Monitor or the Minidisplay port I guess.
  4. xref macrumors newbie

    Jul 28, 2010
    I had this problem when I used the latest Nvidia drivers off of their website. User driver version 267.76 instead.

  5. aeneid macrumors member

    Jun 20, 2011
    Are you connected to a power source? I believe that in order to just use an external monitor you must be connected to a power source otherwise it won't let you just run the external monitor. Maybe that is only in OS X and not windows, but it's worth noting that.

  6. giobox macrumors newbie

    Feb 11, 2009
    Pretty much every laptop with a monitor output will run a secondary display without being connected to a power supply. Every OS X computer definitely will.

    As for the fix, I had the exact same issue. As xref says, installing the older driver fixes it. It appears to be an incompatibility between the Macbook GPU and the latest nvidia driver.

    Setting up VNC to fix the black screen problem is needlessly complicating matters - pressing command-P (on a windows keyboard this is windows key-P) on the keyboard cycles the different monitor output modes, eventually you will cycle back to MacBook display only. This is a standard Windows keyboard shortcut, and a mighty useful one if you regularly use external monitors/projectors.
  7. sashimoto macrumors newbie

    Jan 23, 2009
    This worked like a charm running Bootcamp Windows 7 (64-bit) on my 2010 13" Macbook Pro, using the Nvidia 320M chipset. I installed the very latest drivers from Nvidia and displayport-to-DVI was failing a couple weeks ago. Now it works great. Thanks for the suggestion!

    Note: if you have the latest driver, it will keep asking you if you want to overwrite the target file which is newer. Obviously, the answer is YES. So keep hitting Yes, until it finishes over-writing all the driver files.
  8. parapup macrumors 65816


    Oct 31, 2006
    Does sleep work with those drivers? I tried many older and beta drivers from NVidia site and except for the ones Apple ships with Boot Camp - all others blue screen when attempting to put the laptop to sleep. (I had same problem with dual displays with Win 7 Boot Camp Drivers)
  9. macdaddy1979 macrumors newbie

    Oct 16, 2012
    Fixed this issue on my MBP

    I was also having this issue with my MBP recognising the external monitor when using bootcamp with windows 7 64 bit. It appears that this issue was with Intels latest chipset drivers. Once I rolled these back to driver ver the issue was resolved.

    I hope this helps someone else because I spent 2 hrs with Apple support and them trying to tell me it was an issue with my monitor, to the adapter itself. This was the first and last time will be calling the so called "Mac Genius'" The most frustrating support experience I have ever had.

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