Flashed blank card with uConsole_R01_v1.3b.img
After some initial setup i’ve dist-upgraded this ubuntu.
I’ve played with device till night came, the next morning keboard start to act funny: not detecting every other keypress, sometimes despite button being not held it kept repeating it.
After some initial troubleshooting i’ve found another clue:
[ 129.616893] usb 1-1.1: reset full-speed USB device number 4 using sunxi-ehci
[ 129.768830] cdc_acm 1-1.1:1.1: ttyACM0: USB ACM device
Not having much USB devices onboard i realized that keyboard/trackball composite device is an usb device.
After unbolting face plate messages stopped comming (obviously) as pogo pins had no longer contact with mainboard. Reseating helped and proper device was detected, enumerated and usable.
Until reboot xD
So i swapped my card for one that came with the device - there everything works flawlessly.
What i am missing? Keyboard in “unusable state” resets itself, green LED on it flickers in about 0.5Hz (2s) suggesting hardware problem, but this one i’ve ruled out by booting into unmodified OS.