Re: Howto set my NEC LCD1850E to 60hz in XF86Config-4

["Monique Y. Mudama" <spam@bounceswoosh.org>]

On 2004-04-26, William Ballard penned:
> On Mon, Apr 26, 2004 at 04:02:13AM -0700, Alvin Oga wrote:
>> 	- it should all be autoselect based on 1280x1024 or 1024x768
>
> The problem is X is autoselecting 1280x1024@75 but the "natural
> resolution" of the LCD is 1280x1024@60.  This causes jerkiness in
> full-screen MPEG2 playback when camera pans quickly.  Same thing
> happens in Windows when resolution is @70 and goes away @60.
>
> Need to force X to use @60, autodetect not working.
>

I don't know if this will help ...

I had a similar situation with my LCD.  I did find modelines on the web,
but they shoved the edges of the display off the screen, so I used
xvidtune to find the right values.

Here's what I have; maybe the HorizSync and VertRefresh lines are the
key?  Note that I'm not using exactly the number 60; not sure if that
matters.

Section "Monitor"
        Identifier      "Ilyama AS4314UTG"

        #These are the values from the book; 108 dot clock
        #HorizSync      63.981,79.976
        #VertRefresh    60.020,75.025


        #These were found using xvidtune
        HorizSync       63.53
        VertRefresh     59.59
        ModeLine "1280x1024" 108 1280 1344 1656 1700 1024 1029 1032 1066


        #These work, but cause visible refresh lines
        #HorizSync      79.976
        #VertRefresh    75.025
        #ModeLine "1280x1024" 135 1280 1312 1624 1688 1024 1025 1028 1066

        Option          "DPMS"
EndSection

-- 
monique