[CentOS] Re: screen fonts -- LCD and Analog Connections ...

Fri Jun 17 15:30:00 UTC 2005
Bryan J. Smith <b.j.smith@ieee.org> <thebs413 at earthlink.net>

Ryan wrote:
> I did, 1024x768.
> Sorry, analog

Matthew Miller wrote:
> Maybe the problem is just in that adjustment, then.

Yes.  You need to have your signaling _exact_ when dealing with LCDs.

Some are very good at taking the timings of VESA standards.  But some
support some eccentric Windows timings that are _not_ the exact same
as VESA.  Or maybe you have configured your monitor for X with
bandwidths that exceed the typical VESA modelines.

E.g., did you upgrade from a CRT and just leave your X configuration
intact?  If so, then you might be sending 70, 72, 75 or 85Hz modes
for 1024x768.  And even though your LCD might support that analog
signaling, it's not as ideal as using the VESA standard modes (typically
60Hz for 1024x768 on a LCD).

You need to open up your LCD user's manual, find the resolution you
want, and input the _exact_ 1) Bandwidth 2) Horizonal Sync and 3)
Vertical Sync for that mode into a modeline calculator.  Then put those
modelines into your XF86Config/xorg.conf.

Otherwise, at 1024x768, you're going to see a lot of the distortions.
It has nothing to do with fonts.

Ideally you should be using DVI and not an analog connector.  That
removes the problem entirely.


--
Bryan J. Smith   mailto:b.j.smith at ieee.org