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    AW 18 HDMI output to TV Issue

    Discussion in 'Alienware 18 and M18x' started by spradhan01, May 18, 2015.

  1. spradhan01

    spradhan01 Notebook Virtuoso

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    I have two Alienwares (M18x with 680M SLi and 18 with M290x CF).
    While connected to TV in 1080p, with M18x, it is full screen and no black borders but with AW 18, I can see a black border in the screen. I checked all the settings in TV, everything looks good as it works fine with M18x.
    Can anyone suggest if there is something I am missing or need to check? 20150517_215811.jpg 20150517_215903.jpg
     
    spradhan01, May 18, 2015
    #1
  2. NiveQ

    NiveQ Notebook Geek

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    what you are experiencing is called:
    underscan

    this is caused because there are to types of video signals:
    - computer resolutions (1920x1080)
    - video resolutions (1920x1080 P)
    best solution is to find a 1080 setting wich does not have a underscan visible.
    because that means you are running a native resolution all the way to your tv.
    if it is not native than your tv has to scale the signal to fit.(which means signal delay which is not optimal for gaming)

    Solution:
    it means that your machine is broadcasting on a computer resolution, whilst your tv is receiving on a tv resolution.
    you can search for the underscan feature in the amd software.
    its probably on -15% right now, if you would set it at 0% it should be good.

    Note:
    simply said in the old tv times you would get your tv signal through cable with all the channels available.
    also you would have channel info subtitles and all that kind of extra info being also broadcasted.
    that info en extra's are broadcasted on the black area you see.
     
    NiveQ, May 19, 2015
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  3. Mr. Fox

    Mr. Fox BGA Filth-Hating Elitist®

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    Yes, underscan issue is part of it. If you are using the same TV and get a different result from two computers it can also indicate an issue with desktop scaling. NVIDIA Control Panel has settings that allow you to manually drag the size to fit the TV screen. On some TVs I have to do this manually to avoid black bars, on some I have to do it because the desktop is too large and part of the Windows Desktop and Task Bar get chopped off (overscan). And, some TVs take care of it automatically without having to adjust anything. It has been too long since I used AMD GPUs, but CCC might have a setting like that.
     
    Mr. Fox, May 20, 2015
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  4. spradhan01

    spradhan01 Notebook Virtuoso

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    @NiveQ,@Mr.Fox, that did the trick.
    Thank you gys.
     
    spradhan01, May 21, 2015
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