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UAC popup changes resolution

    Question

  • I have a 2 monitor setup, using a nVidia Quadro card.

    This sometimes happen: When installing a program (any program), or responding to an elevated prompt, the screen changes resolution to a much lower resolution on my primary monitor. The resolution lowers to a much lower resolution. The second monitor remains the same resolution. Afterwards, I cannot change resolution in Display > Screen Resolution. I've tried everything. The only solution is to reboot my system.

    This has been a problem for a very long time, and seem to randomly happen. I've updated both drivers and windows without success.

     

    Wednesday, August 11, 2010 8:06 AM

Answers

  • Hi, can you tell me what is the exact model of the graphic card? Ensure that the graphic card uses WDDM 1.0 or WDDM 1.1 drivers.  Are the same model of the two monitors?

     

    As you said that the issue occurred randomly, this can be caused by incompatible program conflicting with the dual monitor.  Please ensure that you installed the compatible programs.

     

    Please try to set the second monitor as the primary one to see if the issue occurs. Unplug one monitor and just connect one monitor to install the program. Or Unplug one monitor and just connect one monitor to install the program.

     

    Anymore you can try to change the UAC level to “Notify me only when programs try to make changes to my computer(do not dim my desktop)” to see if the same issue appear:

    1 Click “Start”

    2 Type “UAC” in the Search box

    3 Click “Change User Account Control settings”

    4 Change the level to Notify me only when programs try to make changes to my computer(do not dim my desktop)

     

    There are some familiar threads may be helpful to you:

    UAC mess up multi monitor setup

    Win7 monitor resolution re-setting with UAC  

     

    Please Note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

     

    Best&regards

     

                Leo   Huang

     

    Friday, August 13, 2010 7:49 AM
    Moderator

All replies

  • Hi, can you tell me what is the exact model of the graphic card? Ensure that the graphic card uses WDDM 1.0 or WDDM 1.1 drivers.  Are the same model of the two monitors?

     

    As you said that the issue occurred randomly, this can be caused by incompatible program conflicting with the dual monitor.  Please ensure that you installed the compatible programs.

     

    Please try to set the second monitor as the primary one to see if the issue occurs. Unplug one monitor and just connect one monitor to install the program. Or Unplug one monitor and just connect one monitor to install the program.

     

    Anymore you can try to change the UAC level to “Notify me only when programs try to make changes to my computer(do not dim my desktop)” to see if the same issue appear:

    1 Click “Start”

    2 Type “UAC” in the Search box

    3 Click “Change User Account Control settings”

    4 Change the level to Notify me only when programs try to make changes to my computer(do not dim my desktop)

     

    There are some familiar threads may be helpful to you:

    UAC mess up multi monitor setup

    Win7 monitor resolution re-setting with UAC  

     

    Please Note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

     

    Best&regards

     

                Leo   Huang

     

    Friday, August 13, 2010 7:49 AM
    Moderator
  • nVidia Quadro FX 560

    Driver provider is Nvidia  Dated 09.07.2010.

    I think I have tried both WDM and this nvidia but I cannot be sure as its pretty random.

    The second monitor is really small so I don't want to spend time mixing the primary and secondary.

    I've lowered the security as you suggested so I hope this will fix the problem.

    Friday, August 13, 2010 10:52 AM
  • update: lowering security seem to have fixed the problem.
    Wednesday, August 25, 2010 7:00 AM
  • update again. after logging on today (computer was locked) the problem again arises.

     

    this time, however, I tried 16 bit and then it worked. It must be some kind of memory outtage on my Quadro card? My card only has 128MB VideoRam. Might be an issue when I have two screens.

    Friday, September 10, 2010 7:49 AM
  • I have the same problem with a onboard "Intel HD Graphics", shared memory.

    It seems that it always happens, when too much RAM is consumed so that there is not enough memory left for the graphic driver.

    If I kill some applications and hit "<windows>+P" I can get back to the higher resolution.

    Wednesday, February 15, 2012 7:59 AM