So the same issue hit me twice: the on-chip, programmable pullups are only reliably doing their work if the environment is clean: electrical noise from steppers triggered interrupts the zener diode on the pwm1b pin4 of a digistump made it float around Adding 10k/4k7 pullups and 33n debounce caps did the trick.
Btw, my new machine is a EB2 with i5-450M 4GB RAM 320GB HD ATI HD5650 with 1GB 15.5″ FullHD screen From what i get after my install marathon: very nice! Lots of performance and features. Only the case is a bit plastiky. But not bad indeed for around EU800,-. Now i have to get a… Read More »