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Check the bios and see if IOMMU is disabled.  I had a similar problem
with a recent Gigabyte MB and found that the factory setting disables
it.  USB depends on this being enabled for linux.

On 01/29/2014 12:46 PM, Akemi Yagi wrote:
> On Wed, Jan 29, 2014 at 6:11 AM, sserve2013 <[log in to unmask]> wrote:
>> Hello,
>> I have a new gigabyte motherboard 970A-UD3P (rev 1.0) installed.
>> Bios F1 07/06/2013. Serial Number SN133640037609.
>> VGA ATI Radeon Sapphire HD 5450.
>> CPU AMD FX 6300 3.50 Ghertz.
>> Memory 8G kingston DDR3 1600 Ghertz. Power supply 600 watts.
>> I am having problems loading Linux software.
>>
>> No USB mouse is laoding.Error "usb 9-1" is seen.
>>
>> No network internet eth0 is loading= no wired connection error given.
>>
>> All settings is set to legacy since this Linux worked before on my old UFI
>> motherbaord with all the same standard settings.
>> This is a Uefi/efi/legacy board.
>> Some Linus OS not loading are:-
>>
>> --- Scientific Linux SL-64-x86_os_18 is not loading.
>>
>> Any advice?
>> I am sure many thousands of Linux customers and users are having the same
>> issues with this and equivalent motherboards from other manufacturers.
> 
> Scientific Linux 6.5 will be officially released tomorrow. You may
> want to give it a try. Also more detailed info about the NIC device
> (device IDs) will help us help you.
> 
> Akemi
> 
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