I have a Plugable USB3-HUB10C2 that I bought a few days ago from Amazon (order id was 114-1676871-4001037). I have the hub connected to a USB 3.0 port on my computer running Ubuntu Trusty (14.04) fully updated and running the latest 4.3.0 kernel.
The hub doesn’t see any USB 2.0 devices (2.0 not 3.0). Examples include:
- ACR122U USB NFC reader
- Sena UD100 BTLE dongle
- C-Media Electronics, Inc. CM108 USB sound card
All these devices work properly when connected to a USB 2.0 port on the host or through a (different) USB 2,0 hub.
The devices also do not work when connected to the Plugable hub through an additional USB 2.0 hub.
When the Plugable USB 3.0 hub is connected to a USB 2.0 port on the host computer all the devices work.
In SOME cases, I _THINK_ I saw a libusb error related to BULK TRANSFER FAILED.
I have also tried with a different USB 3.0 PCI-E card using the NEC uPD720200 chipset, with the same results.
The lspci -v output for the host USB 3.0 controller is:
02:00.0 USB controller: Renesas Technology Corp. uPD720201 USB 3.0 Host Controller (rev 03) (prog-if 30 [XHCI])
Subsystem: Renesas Technology Corp. uPD720201 USB 3.0 Host Controller
Flags: bus master, fast devsel, latency 0
Memory at f9bfe000 (64-bit, non-prefetchable) [size=8]
Kernel driver in use: xhci_hcd