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As the title says, my system doesn't seem to recognize my USB 3.0. It instead claims to be a 2.0. Any help would be appreciated!

My computer is the Asus Q200E. It's pretty bad, but it works for school. Except for this damn usb 3.0 port

    lsusb -t
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M
    |__ Port 2: Dev 25, If 0, Class=Human Interface Device, Driver=usbhid, 480M
    |__ Port 3: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 3: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 3: Dev 2, If 2, Class=Human Interface Device, Driver=usbhid, 12M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
        |__ Port 2: Dev 14, If 0, Class=Video, Driver=uvcvideo, 480M
        |__ Port 2: Dev 14, If 1, Class=Video, Driver=uvcvideo, 480M
        |__ Port 3: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 3: Dev 4, If 1, Class=Human Interface Device, Driver=usbhid, 12M

pic from hardinfo (highlighted part is what's connected to the supposed 3.0 port)

proof port and usb a are both 3.0 compatible

Terrance
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J-Lit
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2 Answers2

1

Hi the following procedures will fix your problem right away.

  1. Open terminal
  2. Backup your grub config by entering sudo cp /etc/default/grub /etc/default/grub.backup (note: this is the location of the grub config in recent Ubuntu versions, the location of your file may differ based on distro and version)
  3. Open your grub file: sudo nano /etc/default/grub
  4. Find the line that begins with GRUB_CMDLINE_LINUX_DEFAULT and add iommu=soft after "quiet splash" and before the quotation mark "quiet splash iommu=soft".
  5. Save the file by hitting Ctrl-O and then exit with Ctrl-X
  6. Enter update-grub in terminal and hit enter to update your grub.cfg
  7. Restart your machine to let the changes take place.
Stephen Rauch
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AGCreations
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0

Crazy suggestion: check your cable. It might be that your USB cable can't handle gbps and so everything is negotiating to 480mbps of USB2.

It's normal/standard for the XHCI driver to expose both a USB 2 hub and a USB 3 hub in lsusb. You have both - the 5000M entry is USB 3. When you plug something in, it will appear under one or the other hub, depending on how fast it is. So it looks like maybe your linux system is all good, but you haven't successfully plugged in a USB 3 capable system (device+cable) yet.

Leopd
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