I tested also Oneiric beta1 live CD and I found the same problem.
If I connect a USB flash drive and I try to copy to desktop a big file like an iso image, after a few seconds the USB drive disconnect.
My computer is based on a AMD Phenom(tm) II X6 1090T Processor processors (6 cpu cores)
Logitech USB-PS/2 Optical Mouse
Logitech, G15 Keyboard
Logitech, Inc. G15 Keyboard / USB Hub
Asus Crosshair V Formula, BIOS 0506 06/22/2011
It's my first time I comment a bug.
Please let me know if I can supply more useful informations.
I tested also Oneiric beta1 live CD and I found the same problem.
If I connect a USB flash drive and I try to copy to desktop a big file like an iso image, after a few seconds the USB drive disconnect.
My computer is based on a AMD Phenom(tm) II X6 1090T Processor processors (6 cpu cores)
Logitech USB-PS/2 Optical Mouse
Logitech, G15 Keyboard
Logitech, Inc. G15 Keyboard / USB Hub
Asus Crosshair V Formula, BIOS 0506 06/22/2011
It's my first time I comment a bug.
Please let me know if I can supply more useful informations.