I have change the crystal with another http://www.farnell.com/datasheets/1883669.pdf?_ga=2.91929107.865360488.1553497603-1009471460.1547804075&_gac=1.48949716.… but with the same problem. I can see the crystal oscillate after the power on but some ms after it stop. It seems like the chip enter in standby without communicate with the pc.
PS: When i put the chip in reset the crystal works.
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As you mentioned, it seems like that the hub is going into Suspend mode where there will give no crystal oscillations and externally resetting it brings it out of Suspend. Please refer to the Knowledge Base Article for more details. Please try connecting downstream devices and initiating a data transfer to prevent this condition.