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Unable to enumerate usb device - USB flash installation media x64 boot

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https://bbs.archlinux.org – i have 3.0 version of this motherboard, though it doesn't change anything.So i found out that its either my motherboard or kernel drivers work wrong.this post describes what's going on betterthis guy has same issue. He says that latest bios for his asus on 970 chipset works well.For my GIGABYTE mb BIOS update didn't help.So i enabled IOMMU in BIOS peripherals, and linux kernel loads. But i have read that it hits overall PC perfomance.BIOS update for my mb GA-970A-DS3 (rev. 3.0)and BIOS update for GA-970A-D3 (rev. 1.4)(revisions display only difference in preinstalled bios)Here i (HowTos)