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Win7 + NVIDIA = letterbox display bug (workaround)

Discussion in 'NVIDIA' started by qubit, May 17, 2009.

  1. qubit

    qubit Overclocked quantum bit

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    This nvidia embarrassment requires the following ingredients:

    - Windows 7 RC 64-bit (not tried with 32-bit)
    - NVIDIA graphics card, any recent flavour
    - Recent or latest Win7 or Vista WHQL driver (185.85 as of this post)
    - CRT (analog) monitor that can do 1600x1200 or so

    Now cook it in the following way:

    Install Win7. It auto selects 1280x1024 @ 85Hz
    Manually select a mode smaller than this, say 1024x768 @ 85Hz
    It appears as a small letterbox mode in the middle of your screen (see screenshot). This is because the video timing is still stuck at the original 1280x1024 @ 85Hz, so the smaller mode is shown inside it. It's kinda lame to see this in the latest W7 driver (WHQL no less!) and there's no way to make it behave properly on its own. Oddly, it only seems to screw up at a refresh of 85Hz, the original setting selected by W7 during install, all the others being fine.

    But how to fix??? :eek:

    Do the following workaround:

    Open the nvidia control panel
    Click Manage Custom Resolutions
    Click the Create button. The Custom Resolutions dialog box pops up
    Click the Test button.
    Click OK on the confirmation window
    Click Yes on the Apply Changes window

    Now the lower resolution mode, such as 1024x768 @ 85Hz will display full screen. Deleting the custom mode reliably restores the problem (like you'd want to).

    This may show up with hires LCD screens too, but I don't have one to try it out with. Please post your results here.

    Note that ATI cards do not suffer from this malady: ATI 1, NVIDIA 0

    And for all you NVIDIA fanboys out there about to phlame me, I'm running NVIDIA hardware as my main card (see specs) so don't bother! :)

    Yes, NVIDIA will fix this. Eventually. :slap:


    About the screenshot.

    My phantastic photography has autofocused blurry.
    The extra blurred text within the NVIDIA control panel window is caused by a blurring (antialiasing?) effect being applied to the text, when the Win7 150% text size is selected. This is a bonus bug courtesy of NV.

    [​IMG]
     
  2. twicksisted

    twicksisted

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    that just looks like gpu scaling "centered timings" to me but im using lcd and ATI card so i want that if i select a res thats too small to run in native
     
  3. qubit

    qubit Overclocked quantum bit

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    Oh, it's definitely a bug. You can see that the size of the icons is the same, same picture clarity (or not) and if you turn up the monitor brightness, you can see all the unused scan lines all round. As far as the monitor's concerned, it's still displaying a 1280x1024 picture.
     

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