View Full Version : Need help with extensions and KVM switches
03-17-2009, 10:00 PM
Hope someone can help.
I am trying to rig a system so I can put my computer monitor, keyboard and mouse in other rooms, but switch between 2 computers without having to manually unplug the monitor, keyboard and mouse from a computer and switch over.
Currently I have a KVM d-link thingee so that i can press a switch
then change monitor display from digital to analog. Then I can use one computer over the other.
Problem is, with the extension cords attached,
my graphics computer display is yellow and sucks
and the other computer when attached through the KVM goes into sleep mode.
I am told that it may be the strength of the graphics card-being too weak to go out through 30 plus 15 feet of extension(even with 15 feet it doesnt work through the kvm, only though direct connection to each computer).
Is this likely?
Or can i get a box that can be stronger?
The 4 port kvm switch I have is 4 years old or so.
03-17-2009, 10:38 PM
Video signals and any other signals going in and out of a computer are standardized in terms of voltage, it's got nothing to do with the video card's output since all video cards are going to be the same. The problem is running a complex analog signal like VGA over very long cables. I'm surprised it works at all to be honest.
Using something like VNC or RDP will probably be a better option for you to utilize multiple workstations from multiple locations. Or just move them together so the KVM cables don't have to be rediculiously long. Cheers!
03-17-2009, 10:54 PM
I have to get away from the harddrives.
I am getting some sort of weird sinus problem and I think its the dust in the computer room.
I have three hard drives and its the dustiest room in the house, even with frequent vacuuming.
The room next door hardly has any dust.
If I have to get an extra set of cables for the other computer I might, because I would rather have a big trail of cables than sucking in the dust.
Even with an air purifier its bad.
The direct connections into each computer with the cables work quite well, but through the KVM switch-its either yellow or sleep mode.
Anyway VNC and RDP terms were over my non techie head so I had to google them.
I will look into it. :)
03-17-2009, 11:07 PM
VNC and RDP are network protocols for controlling a computer system remotely as if you were actually at the computer (like a KVM that works on the network). The RDP is for hosts that are Windows but has clients for just about anything (like rdesktop client for Linux). VNC works with just about any host operating system and has clients for everything incluidng some cell phones. Also VNC is open source and RDP is not. Cheers!
03-17-2009, 11:18 PM
Ok thanks for the additional info. It helps. :)
03-18-2009, 03:18 AM
Theres no way youre going to get a signal over 30 feet, or even 15 as youve found out. A standard card will shunt the signal over around 10 foot of *quality* cable, I emphasize the quality bit because there is so much naff cabling out there.
If it came in a fancy packet with belkin written on it and aerodynamic contoured gold plated ends, chances are its over-marketed trash.
Instead of buying all these cables and extender boxes, why not just sort out the root of the problem? You say the dust in the other room is too much, but I dont understand then why you dont just move the computer to the other room? Do you think your computer is somehow making dust? If you see a buildup of dust on the vents and inside, then if anything your machine is removing dust from the room youre in.
Even if its a static issue, raising up the machine a few inches off the floor is usually enough to stop the flow of dusty air rising up into the machine and then venting out again.
what case is your machine in?
03-18-2009, 03:34 AM
I tested 45 feet of cable on both machines and it works great. The problem is when i put it through a kvm switch. Then it sucks.
Looking for a workaround for that.
I saw an ad for a kvm switch booster but I dont know.
Need more info.
I cant move 3 computers(I have 2, and a 3rd that is sort of a back up back up--its hooked into kvm but I dont use it in work) into the other room, plus a couple of printers, scanner etc.
I am pretty sure all the electrical equipment is acting as a dust magnet. I want to get away from the hard drives.
I vacuum all the time
and before i know, the dust is back.
I decided if I cant beat em-leave.
Just as long as I dont spend much time around the hard drives.
I want freedom!
As for the case..
it says Silver Stone on it.
its see through.
03-18-2009, 08:46 PM
Looks like I will use extension with my graphics computer and rdp for accessing the other one.
03-20-2009, 03:17 AM
45 feet of freedom to be exact.
RDP worked great.
Goodbye dust and noise!
You can kiss my ash.
03-20-2009, 03:17 AM
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