Windows 8 and 8.1 Forums

Unable to set native monitor resolution after KB patch

  1. #1

    Posts : 3
    Win 8 Pro

    Unable to set native monitor resolution after KB patch

    I did a clean Windows 8 Pro install a week ago with no Windows Updates at all and I was able to set my Asus VK266H monitor to it's native resolution of 1920x1200 using VGA, then today I installed the cumulative patch released last month (KB2756872) and rebooted. The monitor resolution dropped to 1024x768 after the reboot.

    So I right click the desktop, select the native resolution of 1920x1200 and the screen goes blank for 15 seconds then drops back to 1024x768. I tried the next resolution down which is 1920x1080 which works fine but the image quality looks terrible.

    I tried updating the nVidia driver from the standard Microsoft WDM driver to the latest version from which is 306.97-notebook-win8-win7-winvista-64bit-international-whql.exe, but I still cannot set the resolution to 1920x1200!

    So then I tried installing a stack of other KB updates thinking MS may have fixed the problem.. Nope. 1920x1200 still blanks out.

    Next I tried uninstalling all the KB updates... 1920x1200 still blanks out.

    Then I tried a System Restore back to a week ago... 1920x1200 still blanks out!

    For some reason the Monitor driver was set "Generic non-PnP Monitor" so I tried "Generic PnP Monitor" and even 1920x1200 Digital Flat Panel... still blanks out.

    I reboot into Windows 7, 1920x1200 works perfectly fine! Even when using the exact same nVidia driver (306.97). Monitor driver is "Generic PnP Monitor".

    Then I tried another VGA Monitor, a Benq FP222W and that too has the same problem.
    I cannot set it's native resolution to 1680x1050. Lower resolutions work fine.

    I don't know what KB2756872 did but there is nothing I can do except wipe Windows 8 and reinstall it again, making sure I disable Windows Update.

    I would try an HDMI cable but I don't have one to test, but HDMI may have problems with a 1920x1200 signal. (It's HDMI 1.3 I think)

    Did Microsoft fiddle with the VGA timing or EDID detection in KB2756872 due to Metro scaling/compatibility issues?

    The PC is a Toshiba notebook (Qosmio F60) with these specs:
    - CPU: Core i7 Q740
    - Chipset: Intel Series 5 (First gen Core i chipset)
    - Graphics: nVidia GeForce 330M
    Last edited by K24A3; 28 Nov 2012 at 05:12.

      My System SpecsSystem Spec

  2. #2

    Posts : 3
    Win 8 Pro

    [UPDATE]: I seem to have fixed the problem. I uninstalled the monitor driver in Device Manager, disconnected the monitor, rebooted using the internal notebook screen, connected the external Monitor, then set the Monitors to Extended Desktop... 1920x1200 is back! I'm not going to try installing those KB updates again lol. It's back to RTM state now since I did a System Restore to the earliest point.

    It seems to be a bug with Monitor detection since I recall the monitor being recognized as some strange brand of monitor starting with A
    on the Screen Resolution screen, even though the Monitor was set to Generic PnP Monitor in Device Manager. Now the monitor is recognized properly.

    So it seems you just need to get Windows to re-detect the Monitor by uninstalling the driver and rebooting.
      My System SpecsSystem Spec

  3. #3

    Posts : 3
    Win 8 Pro

    Seems I spoke too soon. Upon rebooting the PC I cannot set it to 1920x1200 again even when using extended desktop. The monitor is now detected as "Display device on: VGA" instead of VK266H

    I suppose I could uninstall the monitor driver again but it's not something I would want to do every time I boot up or reboot.

    Looks like I'll need to reinstall Win8 after all, unless someone knows of a solution?
      My System SpecsSystem Spec

Unable to set native monitor resolution after KB patch
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