dmesg

[  894.003473] usb 1-3.1: new full-speed USB device number 5 using xhci_hcd
[  894.022883] usb 1-3.1: New USB device found, idVendor=03eb, idProduct=2144
[  894.022888] usb 1-3.1: New USB device strings: Mfr=1, Product=2, SerialNumber=220
[  894.022891] usb 1-3.1: Product: Mojo V2
[  894.022893] usb 1-3.1: Manufacturer: Emb Micro
[  894.022896] usb 1-3.1: SerialNumber: 84134353230351B0D1B0
[  894.023034] usb 1-3.1: ep 0x82 - rounding interval to 1024 microframes, ep desc says 2040 microframes
[  894.039841] cdc_acm 1-3.1:1.0: ttyACM0: USB ACM device
[  894.040196] usbcore: registered new interface driver cdc_acm
[  894.040200] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters

mojo-loader

http://embeddedmicro.com/tutorials/the-mojo/installing-mojo-loader

remove RXTXcomm from distribution and use one from packages

dpavlin@blue:/blue-zfs/FPGA/Mojo/mojo-loader-1.1.2/lib$ rm RXTXcomm.jar 
dpavlin@blue:/blue-zfs/FPGA/Mojo/mojo-loader-1.1.2/lib$ rm librxtxSerial.so