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thenuw1

Member

Registered: 2014-03-06

Posts: 6

Install from USB [Solved]

When I attempt to boot from the USB image it fails at trying uevents a lot of usb 2-5: device deescriptor read/64, error -32, and a cat /proc/scsi/scsi dos not show usb drive. other funny thing i see is my usb laser mouse seems to power down during this process and even if i unplug it and plug it back in it is not lighting back up. verified the image boots on another system, thinking i am missing something simple. Any ideas?

Last edited by thenuw1 (2015-03-05 15:10:17)

thenuw1

Member

Registered: 2014-03-06

Posts: 6

Re: Install from USB [Solved]

found the issue:

After a lot of searching I finally found the solution to my problem.  I had to enable IOMMU in the BIOS on my motherboard (Gigabyte 970A-D3). 

In case it helps someone else, I found the solution in the following forum post:
http://ubuntuforums.org/showthread.php?t=2114055

Another related post is:
http://ubuntuforums.org/showthread.php?t=2111223

As an aside, I'm not really sure why when IOMMU is disabled, 32-bit kernels work, but 64-bit kernels don't.   I'm guessing IOMMU support is disabled in 32-bit kernels while it is enabled in 64-bit kernels.  Or, it is at least handled differently.

jasonwryan

Anarchist

From: .nz

Registered: 2009-05-09

Posts: 30,426

Website

Re: Install from USB [Solved]

Please remember to mark your thread as [Solved] by editing your first post and prepending it to the title.

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