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-   -   DVI Annoyance (https://www.linuxquestions.org/questions/linux-hardware-18/dvi-annoyance-345523/)

Matir 07-21-2005 07:06 PM

DVI Annoyance
 
I have a 19" Sceptre X9 LCD monitor. Beautiful picture, except for one thing. Ever since I switched from VGA to DVI, dark areas have this intermittent "speckling"... light light spots randomly around the screen. It's like incredibly low-density interference on a TV. This is particularly annoying when trying to use a terminal. :)

Anyone know of anything that can be done to resolve this, other than switching back to VGA? I never really noticed, but the colors seem much nicer with DVI than VGA.

I'm running at my monitor's native resolution of 1280*1024 with a ATI Radeon 9200 SE graphics card.

Electro 07-22-2005 01:27 PM

Try finding DVI cable that is shielded and with an added filter. If you can not find any, make sure the DVI cable never comes contact with AC cables or with any cables. Try not to strentch the DVI cable because copper vastly changes its characteristics to send high speed digital signals. Keep the DVI cable short (about 3 feet or 91.44 cm). Hopefully, manufactures switch to optical instead of copper to send the digital signals over DVI.

Not all LCD work better with DVI. Most of them have piece of shit circuitry for DVI. You get what you paid for. Also it could be the Linux ATI module (driver) that is screwing up DVI. nVidia supports their hardware better than ATI unfortunately nVidia does not care about graphics quality as well as ATI. I suggest at least a nVidia GeForce6 to get the same video graphics quality as the ATI 9000 series.

Matir 07-22-2005 01:59 PM

For the time being, I'm just going back to VGA. The text seems a tiny bit "blurrier" on VGA, but it might just be my imagination.

Unfortunately, having just gotten off the phone with my car mechanic, I can't buy a new DVI cable right now (VERY expensive crap).

Matir 08-11-2005 06:07 PM

While I realize this thread is a few weeks old, I thought an update might help any searchers. I was just up at Microcenter and looked at their selection of DVI cables and picked up a VERY Generic Dual-Link (not sure if it's needed to be DL) DVI cable which claims to be shielded for $30. Even though it has no ferrite beads, this has taken care of my problem. No interference remains, and I hope it will stay that way. So, expensive cables are not always neccessary.


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