A couple of clarifications for E220:
2.6.31-11 Ubuntu kernel does work directly without a glitch.
Ubuntu kernels -12, -13, -14 and 2.6.31.5 kernel does not work directly. It does not work either after several plug in / out cycles.
As Patrick Cost wrote, I can also make 2.6.31.5 work by:
sudo rmmod usb-storage
sudo modprobe usbserial vendor=0x12d1 product=0x1003
A couple of clarifications for E220:
2.6.31-11 Ubuntu kernel does work directly without a glitch.
Ubuntu kernels -12, -13, -14 and 2.6.31.5 kernel does not work directly. It does not work either after several plug in / out cycles.
As Patrick Cost wrote, I can also make 2.6.31.5 work by:
sudo rmmod usb-storage
sudo modprobe usbserial vendor=0x12d1 product=0x1003
After that the device is working properly.