So keypresses are put into the internal key buffer, and then these can be retrieved via I2C or RS-232?

What we have seen here is that we can retrieve the keypresses over RS-232 without any problems, but as soon as we plug in an I2C cable (even if we're not sending or requesting any data over that ...

I'm using a LK204-25. I'm able to talk to it over I2C and serial lines without any problems (having both cables plugged in all the time).

What I've found, though, is that since the I2C is connected, all the button presses get sent out over I2C, and not the serial line. Is there any way to get ...