DFRobot 2.8


#1

I would like to buy a DFRobot 2.8 TouchScreen because of the USB interface. However I would love to know if will work as a second monitor. I.e., if you I will be able to plug a general display via hmdi and the touch via usb and with that setup I will be able to use arrangements such as monitor mirroring, multiple monitor, etc.

Thanks for your attention. I look forward to anyone’s help.

H Marks


#2

I don’t have one of those, but AFAIK you’ll only be able to set one display to handle the console and the other the X environment. I think mirroring is not too difficult to achieve either, but takes a bit of hacking.

These however are general rules I’ve come to accept as what to expect managing multiple framebuffer devices… not sure if that applies to this display specifically. Maybe @gadgetoid will know?


#3

I’ve successfully got the official touchscreen and 2.8 touchscreen working together- and I see no reason why the same isn’t possible with HDMI. The configuration process is so incredibly painful, however, that it’s not something I’d attempt in a hurry.

It’s also low resolution enough that it’s basically totally useless as an X desktop. It’s really best served displaying output from programs that support direct framebuffer writes- those might be your own Python GUI apps, or something else.

From my recollection, the desktops weren’t “extended” like you’d expect- an app started on one display couldn’t be moved to the other, and starting apps on the 2.8" screen was an exercise in frustration.


#4

Thanks so much for the replies. Anyway what I really want is to have the DFRobot 2.8 as the “controller”, i.e., a display with very simple “menus”, and the other, whatever it might be, with the content.

Just one more question: does any of you know if I will be able to use it with Linux but in an intel stick setup? I already am aware of some of the repos with several drivers but, still, I am not sure if this is a workable scenario.

Thanks again.