After installation Ubuntu Server 16 LTS, there is no usb 2.0. I can not connect mouse, keyboard, disc, pendrive e.t.c. On usb 3.0 it works.

Motherboard - new Gigabyte - GA-970A-DS3P

  • It seems that this is old problem with this motherboard and Ubuntu x64. After fast googling I found that the problem was fixed after ENABLING IOMMU in Bios.
    – stambata
    Jun 24 '16 at 11:24
  • Thank you for this, now everything works - usb 3, 2 and my Ethernet. ubuntuforums.org/showthread.php?t=2188370 Jun 24 '16 at 11:54
  • This sounds good.I'll post it as an answer to give you a chance to close.
    – stambata
    Jun 24 '16 at 12:13

Enable the IOMMU option in the BIOS setup

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