At 12:54 PM 11/21/2009, Dag-Erling Smørgrav wrote:
A CRT has an electrom beam that sweeps across the screen left to right and top to bottom, and the horizontal and vertical sync frequencies control how fast the beam moves. An LCD panel does not have an electron beam; it has discrete, individually adressable pixels. If you insist on hooking it up to an analog port, it will have to convert the analog signal to a digital signal in order to display it, and you will get sampling artifacts, aliasing etc. I don't care how good you are at writing modelines; you will never come up with one that looks better than what you will get with a digital connection.
Unfortunately, some monitors with digital interfaces are not compatible with some LCD displays, even though the sockets and cables look like they match up. For example, I recently tried to hook an Asus "Eee Box", which has an HDMI connector, up to a Samsung LCD display using a digital cable. Couldn't get it to work at all, no matter how I adjusted the settings on both. But when I used an analog adapter and cable, it worked on the first try at maximum resolution, with (fortunately) few or no noticeable artifacts. Analog isn't ideal, but it's a good fallback.
--Brett Glass _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-chat To unsubscribe, send any mail to "[email protected]"
