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TUSB2077A: config usb hub port issue in Ubuntu

Part Number: TUSB2077A

Hello,

        Customer can't config usb hub port in Ubuntu. They just can only config TUSB2077APTR.

Ubuntu version is 16.04.   Customer connect usb hub port through PCIE card but they don't have PCIE card now .There is no device connect to TUSB2077APTR
There is one question as below. 

We measure the LED voltage for Portdis and Hubcfg.

Portdis:1.72V
Hubcfg:1.69V
The voltage is abnormal .Has any comments for it? Thank you. 

BR

Patrick