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Re: IO Problems (USB) seem to hang on Boot (AMD64)



On Thu, Mar 05, 2015 at 02:01:38PM -0600, Micheal Smith wrote:
>    To all Glorious Saviors:
>    Installation goes smooth.  When asked, during installation, I install
>    device-specific drivers.  For the record, this is the AMD64 distribution. 
>    So, whenever my IOMMU Contoller is enabled on the UEFI of the motherboard,
>    I get this error: [  1.669503] AMD-Vi: Event Logged [IO_PAGE_FAULT
>    device=2:00.0 domain=0x0017 address=0x00000000be9f9880 flags=0x0010]
>    filling my screen.

Apparently, this is a known issue with the AMD-VI IOMMU. The solution
(according to the interwebs) is to add "iommu=soft" to the kernel
command line (and disable the hardware IOMMU). Hopefully, the errors
below are due to the lack of proper IOMMU and using the software IOMMU
will help.

>    When IOMMU is disabled, I get along the lines of [    2 OR 3 OR 4 OR 5 .
>    (randomnumber)]usb 3-5 device descriptor read/64, error -32.  
>    Somehow, I've also generated an error along the lines of: [   20.979743]
>     nouveau 0000:01:00.0: PMC unhandled INTR 0x44000000
>    The only success I've had in dealing with this is when I tried to use
>    clonezilla, it was having serious problems.  I was able to get *it*
>    working (the Ubuntu-based version) with the following command in the boot
>    parameters: "quiet splash usbcore.old_scheme_first=1".  However, no such
>    luck with Debian....
>    The install process is fine.  I just *can't* get it to boot.
>    Sincerely, 
>    A User

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