AMD Motherboards - USB 3 hub not showing in Ubuntu 18.04

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USB 3 hub not showing in Ubuntu 18.04

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=10591
Printed Date: 25 Jul 2025 at 11:44am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: USB 3 hub not showing in Ubuntu 18.04

Posted By: R78654
Subject: USB 3 hub not showing in Ubuntu 18.04
Date Posted: 02 Jan 2019 at 11:26pm

I have a problem with a usb pci card not being recognised or usable.

The main chip on the usb 3 hub card is a VLI (VL805-06). The card is plugged directly into a pci slot.

I tested the usb hub cards using usb 2 and 3 devices plugged into them.They were not being recognised.

I checked via LSUSB and the devices plugged into the cards were also not appearing there.

I have switched the USB settings in the UEFI to auto compatibility and ran the same test as above. The result was negative.

What can I do to make the hub be recognised?

Here are my MB details:

mb: asrock FM2A88X extreme6+
Serial Number from label on MB's Box: 43MOXD0148/6

Memory: 14.6gb
CPU: AMD A10-4500 Radeon R4
UEFI setup utility:
Switch off C6 state in advanced-cpu config- core 6 mode
(With C6 on ubuntu crashes)
Serial Number: 43MOXD0148/6
bios version PA.20 from:
bios set to XHCI instead of EHCI
IOMMU disabled
iommu=soft set as a kernel parameter in /etc/default/grub:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash iommu=soft"

Replies:

Posted By: nanohead
Date Posted: 07 Jan 2019 at 9:26am

My gut says its more of a Linux kernel/class driver problem than a mobo problem, but I could be wrong. I'm running a hacked version of Ubuntu 18.10 with Cinnamon desktop and some other stuff, and mine sees the built in USB3 with no problem, but the board you're using is older. I'm using the AB350 ITX board with a 200GE at the moment.

Not that familiar with the BIOS/firmware settings, but the only hardware problem that it could be is a PCIe setting. The USB settings in BIOS you played with are for onboard USB MACs built into the system, and if I'm not mistaken, it has more to do with runtime behavior for USB booting and kbd/mouse more than anything else.

It simply could be that Debian doesn't have any hub driver support in the distribution, and therefore never made it into Ubuntu. SWAG on my part, but wouldn't surprise me.