After some time of work, the T30 hangs. There is a white screen on the DVI output and the T30 stops working.
Sometimes the ADC reading stops working only.
I noticed that the effect appears when I perform a quick restart of Iris mainboard and T30.
Today I discovered that when I connect the laptop by the micro usb port of the iris mainboard and then remove it, then also the t30 work stops. When I connect again then the t30 continue work.