Comment # 149
on bug 91880
from alvarex
I forgot to mention I had a similar problem on Windows also with a 260x on the same motherboard so I think in my case is something to do with the motherboard. I tried modyfing some option in grub but that did't help, I added iommu=pt acpi_osi=Linux acpi=force acpi_enforce_resources=lax acpi_osi='!Windows 2013' acpi_osi='!Windows The iommu table is bugged on this motherboard maybe it has something todo? If I disable iommu completely on the bios usb devices will not power up.
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