Where from does hwinfo --monitor take the information "Size:330x210 mm"? - Hardware

This is a discussion on Where from does hwinfo --monitor take the information "Size:330x210 mm"? - Hardware ; Where does hwinfo --monitor take the information "Size: 330x210 mm" from? (It is wrong. I have measured the correct value. The correct value is 331x207mm².) (Laptop computer MD97600 using a built-in LCD.) "~$ sudo ddcprobe; ...; screensize: 33 21; ..." ...

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Thread: Where from does hwinfo --monitor take the information "Size:330x210 mm"?

  1. Where from does hwinfo --monitor take the information "Size:330x210 mm"?

    Where does hwinfo --monitor take the information "Size: 330x210 mm" from?
    (It is wrong. I have measured the correct value. The correct value is
    331x207mm².)
    (Laptop computer MD97600 using a built-in LCD.)
    "~$ sudo ddcprobe; ...; screensize: 33 21; ..." outputs the same false
    data.

    --
    GNU/Linux MD97600 2.6.20-16 generic #2 SMP Jun 7 2007 i686
    Ubuntu 7.04, GNOME 2.18.0, Epiphany 2.18.0, Evolution 2.10.0
    Irssi, OpenOffice.org 2.2, WinXP MCE 2005
    Medion MD97600

  2. Re: Where from does hwinfo --monitor take the information "Size: 330x210 mm"?

    On Wed, 23 Jul 2008 09:39:29 +0000 (UTC), Detlef Lechner wrote:

    >Where does hwinfo --monitor take the information "Size: 330x210 mm" from?
    >(It is wrong. I have measured the correct value. The correct value is
    >331x207mm.)


    Close enough

    Grant.
    --
    http://bugsplatter.mine.nu/

  3. Re: Where from does hwinfo --monitor take the information "Size:330x210 mm"?

    Am Wed, 23 Jul 2008 19:56:21 +1000 schrieb Grant:

    > Close enough
    >
    > Grant.


    Not close enough. Wrong. Letters are blurred, for example.

    Detlef
    --
    GNU/Linux MD97600 2.6.20-16 generic #2 SMP Jun 7 2007 i686
    Ubuntu 7.04, GNOME 2.18.0, Epiphany 2.18.0, Evolution 2.10.0
    Irssi, OpenOffice.org 2.2, WinXP MCE 2005
    Medion MD97600

  4. Re: Where from does hwinfo --monitor take the information "Size: 330x210 mm"?

    On Wed, 23 Jul 2008 10:39:39 +0000 (UTC), Detlef Lechner wrote:

    >Am Wed, 23 Jul 2008 19:56:21 +1000 schrieb Grant:
    >
    >> Close enough
    >>
    >> Grant.

    >
    >Not close enough. Wrong. Letters are blurred, for example.


    You set a monitor up to match the number of pixels, not the physical
    size, then look at sub-pixel anti-aliasing the fonts for LCDs. The
    '96dpi' for example was always a rough estimate, considered equivalent
    to 100dpi. A few percent error in physical size does not make for
    blurred text, setting the wrong number of pixels will. It's that simple.

    Grant.
    --
    http://bugsplatter.mine.nu/

  5. Re: Where from does hwinfo --monitor take the information "Size:330x210 mm"?

    Detlef Lechner schrieb:
    > Where does hwinfo --monitor take the information "Size: 330x210 mm" from?


    From the EDID. It's a data set that is communicated between computer and
    monitor over DVI or VGA. It contains, in addition to the frequency and
    sync requirements and the display resolution also the physical size of
    the display.

    > (It is wrong. I have measured the correct value. The correct value is
    > 331x207mm².)


    Which is very close, you should be fine with it.

    So long,
    Thomas

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