I’ve done some experimenting with the values in config.txt.
The default values for Rpi2 overclock is
arm_freq=1000
core_freq=500
sdram_freq=500
over_voltage=2
I tested by commenting out one by one, and the only setting that effects the CB is core_freq. At 500 there is no reaction from the controllers, at 275 it’s total mayhem (scrolling, clicking etc by it self), and at 265 it’s usable but doesn’t register all input, some double clicking etc. At 260 it seems stable with no ghosting, so now I’m running with these values:
arm_freq=1000
core_freq=260
sdram_freq=500
over_voltage=2
Any good explanation to why the core_freq has such an impact on the CB’s behavior?