** Tags added: needs-apport-collect

** Description changed:

  USB controllers are not recognized on  Ubuntu Studio 16.04 LTS on a
  Gigabyte GA-990FXA-UD5 system [on chip 2.0 controller (via AMD SB950)
  and external onboard 3.0 controller (Etron EJ168)].  Changing EFI values
  in BIOS has no effect - system performs nominally within Win8.1.
  
  DVD boots (EFI and legacy load) the live system where no USB devices are
  recognized.
  
  USB stick boots (EFI and legacy) with a menu but soon ends with the
  following msg:
  
  [     4.667018] usb 4-3: device descriptor read/64, error -32
  [     4.896013] usb 4-3: device descriptor read/64, error -32
  [     5.248018] usb 4-3: device descriptor read/64, error -32
  [     5.477047] usb 4-3: device descriptor read/64, error -32
  [     6.105027] usb 4-3: device not accepting address 4, error -32
  [     6.632023] usb 4-3: device not accepting address 4, error -32
  [     6.632068] usb usb4-port3: unable to enumerate USB device
  
- 
  BusyBox v1.22.1 (Ubuntu 1:1.22.0-15ubuntu1) built-in shell (ash)
  Enter 'help' for a list ob built-in commands.
  
  (initramfs) Unable to find a medium containing a live file system
  
+ Last but not least Ubuntu Studio cant be installed due to other bugs
+ (LAN failure and EFI grub installation abort).
  
- Last but not least Ubuntu Studio cant be installed due to other bugs (LAN 
failure and EFI grub installation abort).
+ WORKAROUND: Set in the BIOS:
+ xHCI handoff - Disabled (was Enabled)
+ EHCI handoff - Disabled
+ IOMMU controller - Enabled (was Disabled)

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https://bugs.launchpad.net/bugs/1574869

Title:
  USB controllers are not recognized (live and install 16.04 Xenial)

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