The USB 3.2 Gen2x2 port can run at 20G speed but reported as 5000M in lsusb

Solution In Progress - Updated -


After plugged an USB3 device that supports 20G into the USB 3.2 gen2x2 port, "lsusb -t" reports 5000M only for the port in which the USB3 device is connected to

lsusb -t
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 10000M
    |__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=uas, 5000M       ****** plugged into a 10Gbit, coming up as 5Gbit

cat /sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/usb4/4-1/speed


  • Red Hat Enterprise Linux 8.4
  • Super Micro Computer, Inc. SuperWorkstation SYS-540A-TR
  • Super Micro Computer, Inc. SuperWorkstation 5014A-TT

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