Hello everyone,
I have a Jetson Xavier NX Developer Kit running JetPack 5.1.1 (L4T 35.3.1), paired with the Seeed Studio reComputer J202 V1.0 carrier board.
This board uses a VIA Labs VL822-Q7 USB hub, which according to its datasheet supports Per-Port Power Switching (PPPS).
When I run lsusb -v, the hub descriptor shows the following:
Hub Descriptor:
- bLength 9*
- bDescriptorType 41*
- nNbrPorts 4*
- wHubCharacteristic 0x00e9*
- Per-port power switching*
- Per-port overcurrent protection*
Essentially, the hub supports power switching across ports.
However, in practice, I can’t seem to turn off the power on any of the USB ports.
I tried using uhubctl, but it had no effect.
Has anyone encountered this issue before with the VL822 on Jetson?
Is there a way to disable or restart the USB ports on this hub?
The problem may be with the firmware or version of uhubctl.
Thank you!