Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.
Buying anything on Amazon? Please use the Geekzone Amazon aff link.




1495 posts

Uber Geek
+1 received by user: 117

Subscriber

Topic # 97494 15-Feb-2012 17:19 Send private message

Hi guys,

Hoping someone will be able to give me a helping hand with the setup of my new KVM switch.

The switch in question is a Rextron DAG12-BK.  It handles DVI video.  Connected to it I have the following:

  1. A desktop PC with a DVI video card.  The cable I have between the desktop PC and KVM switch is a DL-DVI-I cable
  2. A laptop with a VGA output.  The cable I have between the laptop and the KVM switch is a VGA cable with a DVI-A adaptor at the end which goes into the switch.
  3. And finally, a DVI-D cable between the switch and the monitor (a Samsung 22 inch LCD)
Now I get video when the switch is connecting my PC to my Samsung monitor (and keyboard etc).  But when I switch it to my laptop, I only get video on my laptop and not the Samsung monitor.  I've set up dual displays etc, and the laptop can "see" my Samsung (it lists it in the settings).

I'm pretty sure it has something to do with the combination of cables I am using, but I don't really have a clue so if anyone can spot my mistake please let me know.


Cheers. 

Create new topic
2139 posts

Uber Geek
+1 received by user: 43


  Reply # 581967 15-Feb-2012 17:35 Send private message

The problem is that the laptop is only putting out an analogue signal, which uses some different pins on a DVI plug.
It is still detecting the screen as some pins are common.
The DVI input on the screen is only for digital DVI signals.
If all you are needing the switch for is to share the screen then remove it and connect the DVI cable from the PC directly to the screen and the VGA cable from the laptop directly to the VGA on the screen.
Then use the input button on the screen itself to change from DVI/Digital to VGA/Analogue.

Edit: You could still keep the KVM if you are switching keyboard/mouse but it will mean pushing two buttons, one one the KVM and one on the monitor, to switch between PC & laptop.






1495 posts

Uber Geek
+1 received by user: 117

Subscriber

  Reply # 581968 15-Feb-2012 17:36 Send private message

I think I've worked it out.  It is the DVI-D cable from the KVM switch to my Samsung monitor which is causing the issue.  It obviously only carries a digital signal, and not an analogue one too.  Unfortunately my monitor only has a DVI-D input, and a separate VGA input.

I will be getting a new laptop within the next week or so which will also have a docking station or port replicator with it.  The docking station has a DVI output, so I can only hope it is a DVI-D output so everything works ok then...



1495 posts

Uber Geek
+1 received by user: 117

Subscriber

  Reply # 581970 15-Feb-2012 17:39 Send private message

CYaBro: The problem is that the laptop is only putting out an analogue signal, which uses some different pins on a DVI plug.
It is still detecting the screen as some pins are common.
The DVI input on the screen is only for digital DVI signals.
If all you are needing the switch for is to share the screen then remove it and connect the DVI cable from the PC directly to the screen and the VGA cable from the laptop directly to the VGA on the screen.
Then use the input button on the screen itself to change from DVI/Digital to VGA/Analogue.


Thanks for your advice.  I'm also wanting to share a keyboard and mouse, and use the Samsung as a second screen.  Hopefully the docking station with my new laptop outputs a digital DVI signal as per my previous post. 

Create new topic




Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





Trending now »

Hot discussions in our forums right now:

Gigatown winner town and plans
Created by freitasm, last reply by loceff13 on 26-Nov-2014 23:01 (42 replies)
Pages... 2 3


Click Monday Deals
Created by mrtoken, last reply by Krishant007 on 24-Nov-2014 17:11 (25 replies)
Pages... 2


Gull Employment Dispute.
Created by networkn, last reply by Geektastic on 26-Nov-2014 16:35 (142 replies)
Pages... 8 9 10


Letter from Vodafone Speed Decrease WTF
Created by rokki, last reply by michaelmurfy on 26-Nov-2014 23:30 (21 replies)
Pages... 2


HP Stream 7 arrives
Created by gnfb, last reply by gnfb on 26-Nov-2014 22:49 (19 replies)
Pages... 2


The Warehouse pulling R18 games and DVD's
Created by semigeek, last reply by mattwnz on 26-Nov-2014 16:13 (56 replies)
Pages... 2 3 4


Harmoney Credit Offer
Created by rendezvous, last reply by Aredwood on 26-Nov-2014 22:45 (13 replies)

Playing with G.722 HD Voice
Created by aw, last reply by aw on 26-Nov-2014 20:26 (13 replies)


Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.