Windows 7 Bootcamp external/dual monitor not working

Discussion in 'Windows, Linux & Others on the Mac' started by xiard, Jun 11, 2012.

  1. xiard macrumors newbie

    Aug 4, 2011
    I have a 15" MacBook Pro purchased 6/2011. I am running Windows 7 64-Bit Ultimate (with Service Pack 1) under Bootcamp.

    I have a mini display port -> VGA adapeter (Rocketfish) connecting to a Dell monitor. The monitor is detected and usable under OS X. When I boot the computer in Windows, I see the "starting windows" screen duplicated on the external monitor (so the cable and monitor are definitely working).

    Once I'm in Windows, though, the monitor loses the signal in some way. The power button, which was glowing green, is now yellow (as if the monitor needs to be woken up). It's not the same as having no connection, though; if I unplug the cable the monitor shows the "nothing is attached" floating graphic.

    My cursor will move off of my main MBP display as if there is an external monitor, but nothing shows up. In my display properties, the Dell monitor is detected as a secondary display, and it is automatically setup to do monitor extending. So everything looks fine...except for the fact that nothing shows up on the monitor.

    Note that connecting to a TV using mini display port to HDMI under Windows 7 works fine.

    Any thoughts? Looks like people have had a LOT of issues with dual monitors under Windows 7, but I didn't see any obvious solutions.


    David Cater
  2. techguy20 macrumors 6502

    Jan 30, 2010
    I've used a similar adapter with Windows 7 in Bootcamp and have had no issues.

    I assume you have the latest Bootcamp drivers installed, correct?
  3. xiard thread starter macrumors newbie

    Aug 4, 2011
    That's a good question. Can you update Bootcamp drivers manually (i.e., separately from the OS)? It seems like when I looked into that in the past, I made sure Bootcamp was "up to date" by just making sure my updates in OSX were current. I've checked Software Update in OSX and Windows Update on the Windows side, and everything is up to date.
  4. xiard thread starter macrumors newbie

    Aug 4, 2011
    Just checked on, and it appears the latest Bootcamp version is 3.3. That appears to be the version I have (from About Boot Camp dialog in Windows).
  5. Sincci macrumors regular

    Aug 17, 2011
    The latest version is 4.0 which comes with OS X Lion. You'll need to run the bootcamp assistant in OS X in order to download those drivers.
  6. xiard thread starter macrumors newbie

    Aug 4, 2011
    Oh, man, I had really high hopes for that. I booted in OSX, created a CD with the new BootCamp support setup program, and then installed it in Windows. I am now running BootCamp 4.0.

    Unfortunately, the behavior is the same. I also checked to see if I could now connect my laptop to my Bluetooth speaker (Jawbone Big Jambox) as an audio device, and that still isn't working either. Sad.

    So to answer your original question...yes, I have updated drivers. And I still can't use an external monitor.

    Thanks for the replies...any other thoughts?
  7. AnonMac50 macrumors 65816

    Mar 24, 2010
    Try using the AMD drivers. For example, on my MacBook Pro (with nVidia), I just downloaded the update and installed. Also, you might have to do a clean install of the driver instead of just updating it.

    Check the Catalyst Control Center first before you update the drivers though. There might be something there to help (that is the most confusing program I used though, so it might be hard to find what you need).

    Also, maybe the resolution or refresh rate is over the limit? Probably not but wouldn't hurt to check.
  8. qwertys macrumors newbie

    Sep 5, 2012
    Did you fix this problem? Just wondering because i am having the same issue.
  9. Dal123 macrumors 6502a


    Oct 23, 2008
    I also have the exact same issue, anyone have any ideas?
  10. Freyqq macrumors 601

    Dec 13, 2004
    Download video drivers straight from your GPU manufacturer. They tend to be more up to date anyway.

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