USB problems Asus 990fx sabertooth

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http://crunchbanglinux.org – Hey guys,Installed Crunchbang onto my new PC today but having problems with my usb mouse and keyboard, Both work fine one minute then suddenly i get no response from either the mouse buttons (but the pointer still moves) or less often the keyboard.After doing some research ive found that some people have had usb not working at all with this motherboard and Linux, but have gotten around this by disabling the IOMMU setting in bios, but this doesnt work at all for me.heres some info on my setupAsus 990fx Sabertooth motherboard , latest 1503 bios (same propblem with previous 1304 bios)AMD fx4100 c (HowTos)