Expert 250 Pro awake from sleep -> USB connection lost

[ogs]

Ah, I see. Must be something funny going on in the USB chipset of your 250 then. I actually never tried the USB input of the CI board. My experience relates to the old USB input. The new USB input on the CI should work the same though. Did you contact Devialet about this? The error log from USB Prober is very clear on what happens...

EDIT: you say that removing and reinserting the USB cable helps. This indicates that the USB chipset needs to loose the 5V on the cable temporarily to enumerate again. The USB chipset in the 250 (XMOS) doesn't use bus power, but needs the 5V present to trigger enumeration. Devialet may need to look at the USB INIT code.