[UFO Chicago] LCDs and Linux

Nate Riffe inkblot@geocities.com
Sat, 4 Aug 2001 21:42:22 -0500 (CDT)

On Sat, 4 Aug 2001, Larry Garfield wrote:

> Elliot Shank wrote:
> > Larry Garfield wrote:
> > > Does anyone have any experience with LCD monitors under Linux?  Are
> > > there any gotchas that I need to keep in mind?  My assumption is that
> > > they're either as cranky as video cards or as easy as keyboards, but I
> > > don't know which. :-)
> >
> > Not under Linux, but we've got an unbelievable quantity of NEC MultiSync
> > LCD1830s at work running with Matrox G400s under NT4.  And let me tell
> > you, I am disappointed.  I don't know about other displays, but stay
> > away from this one.  Ghosting, burn-in (it's like the return of the
> > bad-old days of CRT burn-in), pixels dropping out.  Yucko.  Stay away.
> I'll remember that.  The monitor will be used on both a Mandrake box and a
> Win2k box, as well.  Burn in is not good.
> Another question, only slightly OT.  Does anyone know what "phase" is on an
> LCD?  On several monitors I saw in the store, when I played with the phase
> part of the screen went out of focus while another part was nice and sharp.
> I could get one side of the screen in focus or the other, but not both.  On
> others, at the right phase the entire image was perfectly clear.  What
> exactly am I doing, and why the difference?

SVGA == analog signal
LCD == digital display and has to do the conversion

Basically what you're doing is messing with the sync.  I guess some
monitor/card combinations just don't speak the same dialect of SVGA.


> --
> Larry Garfield
> lgarfiel@students.depaul.edu
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Nate Riffe			Help Dmitry Sklyarov find freedom in the so-
inkblot@geocities.com		called "Land of the Free."