pkor
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Dual Monitors

Thu Jan 03, 2013 11:46 pm

Has anyone successfully used two monitors with a rasberrypi for mirrored or extended desktop, possibly a set up with one or both being touchscreen?

jamesh
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Re: Dual Monitors

Fri Jan 04, 2013 1:39 am

No, there is only one HDMI and one composite IF and they both display the same image.
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ghans
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Re: Dual Monitors

Fri Jan 04, 2013 1:39 pm

Well , the blogger seems to be a real Linux guru.
Not something i am confident enough to try myself :

http://karuppuswamy.com/wordpress/2012/ ... -raspbian/


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pkor
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Re: Dual Monitors

Fri Jan 04, 2013 6:31 pm

Thanks for the replies. It really isn't important for this project to do extended desktop so the same image on both screens is no problem. Has anyone used a standard touch screen?

4thdwarflord
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Re: Dual Monitors

Fri Jan 04, 2013 6:42 pm

if you had another computer you could have 2 desktops, one for each screen, using VNC.

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mahjongg
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Re: Dual Monitors

Fri Jan 04, 2013 6:50 pm

When (somewhere in 2013, I suppose) the Raspberry PI foundation releases the DSI interface board you can connect an LCD panel, and that will act like a second, independent, screen.

see a description of the Display Serial Interface, and a picture of its position on the PI in this Wikipedia article: http://en.wikipedia.org/wiki/Display_Serial_Interface

Michael Meissner
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Re: Dual Monitors

Fri Jan 04, 2013 9:56 pm

Another possibility might be to use USB monitors. For instance, I noticed this via google: http://plugable.com/2011/12/23/usb-graphics-and-linux. :geek:

FragMonkey
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Re: Dual Monitors

Sat Jan 12, 2013 3:34 am

For my Windows PC I use a Matrox DualHead2Go. It accepts vga/dvi inputs from two monitors and tricks Windows into believing the two monitors are in fact one large display

http://www.matrox.com/graphics/en/produ ... o/digital/

I don't know if they make linux drivers, but I don't even install the drivers on my Windows pc. It seems to be largely a hardware solution, and it has worked fine on my PC for a time when I dual-booted Ubuntu.

However, the Digital Edition with the DVI inputs goes for about $215 on newegg and the analog edition with VGA inputs is about $150

andrewjoy
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Re: Dual Monitors

Fri Jan 18, 2013 4:06 pm

the raspi only supports 1 display, now i dont know if you could possibly use RS232 form the GPIO ( don't know if the GPIO uses RS232 or TTL logic would have to check) out to a serial terminal or to USB and have a PC running Screen and have text only output on that and then have another virtual terminal running on the pi and outputting to HDMI or composite

ghans
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Re: Dual Monitors

Fri Jan 18, 2013 4:16 pm

Yeah , the GPIO have a TTL tty which can display
very early boot messages. But in your setup you need three
devices (including a PC !) and two screens.

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RaTTuS
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Re: Dual Monitors

Fri Jan 18, 2013 4:28 pm

best way is to have 2 RPi's to drive 2 monitors - how to share mouse and keyboard is easy ..
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Sootie
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Re: Dual Monitors

Tue May 28, 2013 10:21 pm

It is possible with one of these

http://www.ebay.com.au/itm/USB-2-0-To-V ... 941&_uhb=1

A usb hub and heaps of stuffing around

but still...

Image
Image
Image

Rwreed
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Re: Dual Monitors

Wed Jun 12, 2013 1:58 pm

Sootie,

Do you have details posted somewhere on how you got this to work? This looks like the most promising option until dsi is supported.

Thanks in advance
Randy

Sootie
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Re: Dual Monitors

Thu Jun 13, 2013 3:22 am

I did have the image of it but it would appear I have deleted it unfortunately.

The basic steps were
1. recompile your own kernel with drivers as per here http://anup.info/blog/2012/10/13/raspbe ... mo-monitor
2. plug it all in
3. muck around with xorg.conf until it works (xinerama has to be on)

there is a heap of cpu used to do the dual monitors though and for some reason once you re-compile the kernel you cant use citrix xendesktop (which is what I wanted it for) it just crashes the whole pi

Not something I would recommend for anything except to say you could.

fonsek87
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Re: Dual Monitors

Wed Oct 02, 2013 12:06 pm

Hi,

I´m searching information about manage my raspi throw ssp with my laptop and use the HDMI like second monitor.
Is it possible? I have been trying the last days but I don´t get it yet.

ghans
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Re: Dual Monitors

Sun Oct 06, 2013 8:16 am

You want to connect a TV to your Raspi and then use
this as second monitor to your Laptop ?? Your question is
a bit unclear.

ghans
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rurwin
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Re: Dual Monitors

Sun Oct 06, 2013 9:32 am

You would be getting Windows (I assume it's a Windows laptop) to admit to having two screens. It can generally handle a separate display on the LCD and VGA-out. The trick would be to enable the VGA-out as a separate screen, even though no monitor was connected to it. Then run VNC and have it serve the VGA-out screen to a VNC client on the Pi.

Smells tricky to me.

PiGraham
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Re: Dual Monitors

Sun Oct 06, 2013 10:59 am

Is this relevant?
RasPi Video Wall
http://www.raspberrypi.org/archives/3648

jonsaddles
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Re: Dual Monitors

Fri Feb 14, 2014 4:04 pm

Realise this is an old post but I think what the op was looking for is similar to my requirements, that is to have 2 screens showing the same image.
For instance if I am working behind a counter and want my customer to be able to view the screen as well.

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RaTTuS
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Re: Dual Monitors

Fri Feb 14, 2014 4:11 pm

use an hdmi splitter
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jonsaddles
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Re: Dual Monitors

Fri Feb 14, 2014 5:50 pm

Ha yea fair enough, unfortunately my other monitor is composite input only and it's a built in unit so can't change it.

ghans
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Re: Dual Monitors

Sat Feb 15, 2014 9:20 am

Use a composite video splitter instead :

http://www.amazon.com/gp/aw/d/B00069R5L ... 35-0119336



ghans
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MishMash
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Re: Dual Monitors

Sat Dec 12, 2015 4:52 am

I have the new 7" raspberry pi touchscreen monitor, but would like to duplicate the image on a larger screen while I design touchscreen layout options for menus and such. It seems when the hdmi display is plugged in, the touchscreen is off. Can they both be configured to operate at the same time?

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fruitoftheloom
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Re: Dual Monitors

Sat Dec 12, 2015 6:08 am

MishMash wrote:I have the new 7" raspberry pi touchscreen monitor, but would like to duplicate the image on a larger screen while I design touchscreen layout options for menus and such. It seems when the hdmi display is plugged in, the touchscreen is off. Can they both be configured to operate at the same time?
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