Dual Monitors

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]

No, there is only one HDMI and one composite IF and they both display the same image.

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

http://karuppuswamy.com/wordpress/2012/08/17/lilliput-displaylink-usb-monitor-um-70-17e902a9-with-raspberry-pi-on-raspbian/


ghans

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?

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

[mahjongg]

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

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.

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

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

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.

ghans

best way is to have 2 RPi's to drive 2 monitors - how to share mouse and keyboard is easy ..