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Thread: Finding out the vertical refresh and horizontal sync rates...

  1. #1
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    Finding out the vertical refresh and horizontal sync rates...

    Does there exist a program to find out the vertical refresh rate and the horizontal sync rate?

  2. #2
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    Re: Finding out the vertical refresh and horizontal sync rates...

    Most newer monitors will tell you waht they are, when you open up the settings for the monitor.

  3. #3
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    Re: Finding out the vertical refresh and horizontal sync rates...

    Quote Originally Posted by perlluver View Post
    Most newer monitors will tell you waht they are, when you open up the settings for the monitor.
    And how do you do that?
    BIOS?

  4. #4
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    Re: Finding out the vertical refresh and horizontal sync rates...

    Quote Originally Posted by khr View Post
    And how do you do that?
    BIOS?
    If you have a wheel, or menu button on your monitor itself, you should be able to press that, and it will bring up the menu, where you would fix your picture and move it. It shoud be in there usually on top, of that little pop up screen.

  5. #5
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    Re: Finding out the vertical refresh and horizontal sync rates...

    Quote Originally Posted by perlluver View Post
    If you have a wheel, or menu button on your monitor itself, you should be able to press that, and it will bring up the menu, where you would fix your picture and move it. It shoud be in there usually on top, of that little pop up screen.
    Im not using a monitor.
    Does actually laptop screens have a vertical refresh or horizontal sync rate?

  6. #6
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    Re: Finding out the vertical refresh and horizontal sync rates...

    Quote Originally Posted by khr View Post
    Im not using a monitor.
    Does actually laptop screens have a vertical refresh or horizontal sync rate?
    I'm not sure of that, I believe they do, but I have never owned a laptop, therfore I am not sure how to check what it would be.

  7. #7
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    Re: Finding out the vertical refresh and horizontal sync rates...

    /usr/share/applications/screen & graffics Check in there ...
    "it crashed?"

  8. #8
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    Re: Finding out the vertical refresh and horizontal sync rates...

    Quote Originally Posted by sailor2001 View Post
    /usr/share/applications/screen & graffics Check in there ...
    That helped, thanks!

    The model was set on plug 'n' play which is:
    HorizSync: 28.0 - 33.0
    VertRefresh: 43 - 72

    Just incase its wrong, i wrote down the HorizSync and the VertRefresh for the 1280 x 800 LCD model...

    Anyway, i've a question to this:
    Can i trust it?

  9. #9
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    Ubuntu 9.10 Karmic Koala

    Re: Finding out the vertical refresh and horizontal sync rates...

    Run
    Code:
    % xvidtune -show
    You should get something like

    Code:
    "1680x1050"   146.25   1680 1784 1960 2240   1050 1053 1059 1089 -hsync +vsync
    146.25 is the pixel_clock_freq (in MHz),
    2240 is the the h_field_len,
    1089 is the v_field_len.

    Then, according to http://en.wikipedia.org/wiki/XFree86_Modeline,
    the refresh rate (rr) is given by the formula
    Code:
    rr = pixel_clock_freq / (h_field_len * v_field_len)
    In the above case,

    rr = 146.25 * 10^6 / (2240*1089) = 59.9 Hz.

    rr is also called the Vertical refresh rate.

    The horizontal sync rate (hsr) (I'm guessing) is given by

    Code:
    hsr = pixel_clock_freq / h_field_len
    So in the case above, it equals

    hsr = 146.25 * 10^6 / 2240 = 65.3 KHz.

    These numbers match (to within 0.1) what my monitor tells me the values are.
    Last edited by unutbu; May 2nd, 2008 at 07:33 PM.

  10. #10
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    Kubuntu 8.04 Hardy Heron

    Re: Finding out the vertical refresh and horizontal sync rates...

    When I had to manually edit my xorg.conf file to adjust the monitor, I went to this site to get the specs: http://www.monitorworld.com/

    Don't know if it would work for a laptop tho'.

    Sara Lou
    Just because i'm paranoid, doesn't mean they're not out to get me!!

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