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3 monitors (2 lcd & 1 laptop) 2 active

Last response: in Graphics & Displays
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October 13, 2011 8:11:49 AM

hi

I have a question about using multi screen.

We have a laptop (hp elitebook 8740w) with the advance docking station.
on the docking station we have:

2x hdmi
2x dvi
1x vga

the problem is that we want 3 screens active.
so the laptop screen and 2 attached.

i see that windows (win 7 32bit) detects al the screens.
onle 2 are active and the third is grayedout (can not be configured)
the 2 connected are on dvi.

anyone know how i can active the tird one? or is it not possible?

kind regards
joeri


More about : monitors lcd laptop active

October 13, 2011 4:01:02 PM

Which docking station do you have and do you have the ATI graphics option. According to the HP web site you can have upto four external monitors. If you have the Nividia graphics option you can support fewer monitors. Only the HP advanced docking station has a pair each of DVI and Displayport conectors, the HP standard docking station has one each DVI and Displayport conectors. Here is the link: http://h20000.www2.hp.com/bizsupport/TechSupport/Docume...
a c 177 U Graphics card
a c 224 D Laptop
a b α HP
a c 112 C Monitor
October 13, 2011 4:47:09 PM

Just about every laptop has a two monitor limit, the physical connection number does not matter. The link posted above gives good info on what configuration you can do with what video card.

Check with HP support, or try the Matrox Dual-Head devices.
Related resources
a b U Graphics card
a b C Monitor
October 13, 2011 6:17:29 PM

That workstation has a couple of video options. If you have the Nvidia model the Quadro fx only has a dual ramdac. That means no matter how many connectons there are it can only run two screens.

If you got the ATI fire pro mxxx those support eyefinity and should be able to run up to 6 monitors.

If you have the Nvidia based you can get a USB to DVI-hdmi video card adapter.
Its a little box that conencts your monitor to a free usb port. The speed and resolution is not great but they work well enough for basic productivity like coding or MS Office.
October 17, 2011 2:22:32 PM

The laptop has a ATI firepro M7820 video card.
I tryed to enable the screen from there but dusn't work.
I see my 3e screen(in the option) but can not enable it.
if i do it says: to extend the current desktop you need to deactivate a other one.

the docking station i have is : advance docking station by HP

I know/ think there must be an option 4 it.
why would they make a docking station with 6 connection if you can not use them.
a c 177 U Graphics card
a c 224 D Laptop
a b α HP
a c 112 C Monitor
October 17, 2011 2:31:22 PM

You may need to check the documentation that came with your laptop on how to do this. If you read the link posted above it's a good starting point as it lists details as to what you can do with the connections.
October 18, 2011 5:42:08 AM

@greghome : don't you need a special monitor 4 eyeinfinity?
October 18, 2011 11:39:28 AM

oke

I updated the video card driver and applications.
The eyefinity option is now available. but it dusn't show the 3de screen.
I know the screen is oke because in windows (like sayed above) detecteds all teh screen but can not activate all.

Could this be because we are using a 32-bit OS?
October 18, 2011 12:46:22 PM

so i need a splitter then on that port? or just connect 1screen on the dvi and the other one on the display port output?
October 18, 2011 3:27:51 PM

You can connect at least one monitor on the displayport and the other on the DVI port.
a c 177 U Graphics card
a c 224 D Laptop
a b α HP
a c 112 C Monitor
October 18, 2011 3:35:04 PM

joeri p said:
so i need a splitter then on that port? or just connect 1screen on the dvi and the other one on the display port output?


A splitter will just get you the same display on both monitors, if that's what you want, you can use a splitter.
October 19, 2011 10:21:52 AM

tryed to connect to the display port and again windows 7 detects the monitor but i can not activate it (BTW. in the catalyst option from ATI it dusn't see the third monitor any time)
October 20, 2011 12:42:52 PM

I think there is a problem with using the DVI output for multiple monitors. I suggest you try connecting each screen to a Display Port.
November 4, 2011 1:14:18 PM

oke i'll try.
cables just came in.
November 4, 2011 1:35:54 PM

not working.
same as the one with dvi.
i'm starting to think its software related
November 24, 2011 8:01:17 AM

oke apperently you can NOT connect 3 monitors to 1 video card.
a video card can only send out 2 video outputs.
if you need more you either go sli or buy external video.

Thx anyway guys

February 21, 2012 7:02:17 PM

joeri p said:
oke apperently you can NOT connect 3 monitors to 1 video card.
a video card can only send out 2 video outputs.
if you need more you either go sli or buy external video.

Thx anyway guys



Hi.
Did you try to connect three external monitors through docking station dvi and display ports ?
March 20, 2012 2:37:55 PM

Your 8460w (elitebook mobile workstation with ATI FirePro card) DOES support FOUR independent screens if you are using the Adv Docking Station. Unfortunately, HP's design of the docking station is misleading. In order to support 4 displays, at least 3 of them must be connected via DisplayPort. If you do not have DisplayPort capable monitors, then you can use adapters but they must be ACTIVE DisplayPort adapters (e.g. ACTIVE DP-DVI or ACTIVE DP-VGA). The Adv Docking Station has two DP outlets, which HP elected to put on the same channels as the DVI ports -- the kicker is that HP didn't elect spend the extra $3 to make the DVI ports ACTIVE so you would only ever be able to use one at a time anyway.... Anyway -- if you purchase ACTIVE DP-DVI (or DP-VGA) adapters for your DP ports or purchase DP-capable monitors (I know - makes me a little sick too), you'll be up and running.
June 2, 2012 10:21:39 AM

shawng said:
Your 8460w (elitebook mobile workstation with ATI FirePro card) DOES support FOUR independent screens if you are using the Adv Docking Station. Unfortunately, HP's design of the docking station is misleading. In order to support 4 displays, at least 3 of them must be connected via DisplayPort. If you do not have DisplayPort capable monitors, then you can use adapters but they must be ACTIVE DisplayPort adapters (e.g. ACTIVE DP-DVI or ACTIVE DP-VGA). The Adv Docking Station has two DP outlets, which HP elected to put on the same channels as the DVI ports -- the kicker is that HP didn't elect spend the extra $3 to make the DVI ports ACTIVE so you would only ever be able to use one at a time anyway.... Anyway -- if you purchase ACTIVE DP-DVI (or DP-VGA) adapters for your DP ports or purchase DP-capable monitors (I know - makes me a little sick too), you'll be up and running.


Really thank you very much. It 's just absurd hp explaining the connection options, and even online technicians are able to solve the problems of Eyefinity. I run on my 8740w upgrade from nvidia fx2800 with ATI FirePro M7820, replaced heatsink, purchased advanced docking, bought 2 LA2405wg monitor, all for having 3 displays simultaneously, without success ... Now thanks to your advice I bought the cables displayport male to male, and definitely will solve the problem. bye
a c 273 U Graphics card
a b C Monitor
June 2, 2012 10:29:33 AM

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