我這邊測試的結果：

關掉整組
> uhubctl -a 0 -l 2-1
Current status for hub 2-1 [8087:0024, USB 2.00, 8 ports, ppps]
Port 1: 0100 power
Port 2: 0100 power
Port 3: 0100 power
Port 4: 0100 power
Port 5: 0100 power
Port 6: 0100 power
Port 7: 0100 power
Port 8: 0100 power
Sent power off request
New status for hub 2-1 [8087:0024, USB 2.00, 8 ports, ppps]
Port 1: 0000 off
Port 2: 0000 off
Port 3: 0000 off
Port 4: 0000 off
Port 5: 0000 off
Port 6: 0000 off
Port 7: 0000 off
Port 8: 0000 off

打開第一個 port
> uhubctl -a 1 -l 2-1 -p 1
Current status for hub 2-1 [8087:0024, USB 2.00, 8 ports, ppps]
Port 1: 0000 off
Sent power on request
New status for hub 2-1 [8087:0024, USB 2.00, 8 ports, ppps]
Port 1: 0100 power