4D 4.3" Display Cape and Debian 8.3 Image compatability

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1

Good afternoon.

I am upgrading a course I teach to use the Debian 8.3 image that was released in January. In the course, we use the 4D Systems 4.3" cape as a touchscreen, and I am having difficulty getting it to work with the 8.3 Debian release. My larger displays plug in and work fine, but the smaller displays do not display anything. For right now I am booting off of a uSD, though eventually I’m going to reflash the board itself. I’m sure it’s a simple config issue somewhere; I’m just not sure where to look. I tried a few of the things mentioned in older posts (i.e. June 2015 or so) but did not necessarily have any success (and I would have figured those changes would have made it into the January 2016 release.

Any ideas?

Thanks,

Walt

2

Well how does:

http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#Debian_Image_Testing_Snapshots

Compare:

/boot/uEnv.txt

dtb=am335x-boneblack-emmc-overlay.dtb

Regards,

3

Let me grab that one and see if it works better.

4

Robert:

To quote Apollo 13: “you, sir, are a steely-eyed missile man!”

Works like a charm now. Now to determine whether I want to change the image I give my students or have them make this change when they first start using it. That’s the $2000 question.

Thanks for helping with the obvious!

Walt

5

Sweet!

BTW, don't get "too" attached to that image.. (i have a replacement
being generated right now..)

I just landed some patches today to utilize:

https://github.com/nodesource/distributions

for nodejs v0.12.x

That's the really only change from last sunday's. it add's an
additional repo in /etc/apt/sources.list...

Regards,

6

btw did the touch screen calibration actually works this time on first bootup?

We still need to tweak the filter on the v4.1.x adc/touchscreen driver..

Regards,

7

I forgot to followup on this after seeing it multiple times. Touchscreen calibration still seems flaky. Sometimes it works for me. Other times not.

Walt