USB ports are not working with some Gigabyte motherboards with AMD chipsets

a couple users reported having issues with USB with Tails on recent Gigabyte motherboards (“Gigabyte GA-970A-DS3P FX (2.1)” and “Gigabyte AM3+ AMD 970”, not sure they are the same).

people are not able to log in as the mouse and keyboard are plugged in the USB ports, unless they turn on a iommu option in the BIOS, and add the following boot parameters:

amd_iommu=on iommu=pt

Feature Branch: web/16679-usb-broken-on-gigabytes

Related issues

Blocks #15941 (closed)

Original created by @goupille on 16679 (Redmine)

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