[ubuntu] Problem detecting USB in 12.04 x64, works on Xubuntu 13.04 64x and windows

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http://ubuntuforums.org – Hello All, I am banging my head against the wall on this one. I have a SanDisk Extreme USB 3.0 64GB thumb drive that used to work on my box running 12.04, but now that box will not detect it in any way I can determine. I have tried it in several of the USB ports to no avail. It will detect and mount a different drive, a Patriot Memory 32GB drive. Both my windows laptop and a box I have running Xubuntu 13.04 do detect and mount the drive. Any thoughts? (Hardware)