I have not tried making ver 2 work in Linux, due ver 1 is still working fine.
I would have to say that you need to double and triple check all your config for LIRC.
The output from my machine when I press "Ok" button using GtkTerm monitoring /dev/ttyUSB0 is gibberish. and it is configured just as the how-to states running Mythbuntu 10.04
I think that I am getting the same stuff, this is why I feel you have a LIRC config issue.
I am now thinking to build me a version 2 unit....:)
That fault means that no input or bad input was received. Which trying to use /dev/ttyACM0 will not work due I have tried it also, but this is what will make it work
lank23@MythServer:~$ lsusb Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 002: ID 04d8:000a Microchip Technology, Inc. Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 003: ID 058f:6362 Alcor Micro Corp. Hi-Speed 21-in-1 Flash Card Reader/Writer (Internal/External) Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
So from that I see that "04d8:000a Microchip Technology, Inc." is my device I need.
4: Next edit the "/etc/modules" using the number we got from step 3.