I'm having exactly the same problem with REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER running Marlin 1.1.0 RC6 on a Sanguinololu 1.2a board.
the 128x64 LCD is working nicely but turning and pressing the encoder doesn't do anything (remains on the home screen showing temperatures + xyz positions etc).
STOP button resets the micro-controller, which i believe is correct.
I've tried running sparkfun's second example project from [
www.sparkfun.com] using the pins I've got in my pins_SANGUINOLOLU_11.h and it works! So looks like the hardware is okay, and I've found the right pin numbers.
For reference:
#define BTN_ENC 16
#define BTN_EN1 11
#define BTN_EN2 10
Configuration.h - [
pastebin.com]
I read somewhere that these are important, but alas, no success yet.
#define ULTIPANEL
#define NEWPANEL
Any tips for the non-responsive encoder would be much appreciated!
Thanks
Chris