I've lost track of the details in this particular case, but it sure seemed more like another case of "fast controller operations wedge the device" than anything else. What controller was that desktop using again?
The controller on the desktop is UHCI. VIA Technologies, Inc. VT6202.
You don't seem to be using the EHCI capabilities there, but if you were I'd suggest you maybe try a different host controller.
Since you're using it at full speed, the "fast operations wedge the device" situation is rather unlikely to be happening. But I had evidence pointing to DMA timing problems with the VT6202, and maybe they'd also appear with its UHCI support too.
Commands are the same unless something subtle is happening, both systems are up-to-date Gentoo installs and I used cp and umount, nothing else.
I noticed this doing something while totally unrelated, the device is a bit braindead since it seems to be presenting itself as a USB 2.0 device (from dmesg):
usb 2-2: new full speed USB device using address 2
That means "bus 2 port 2" using "address 2".
Nothing to do with USB 2.0 ... if it said "high speed", that would be a USB 2.0-only feature. :)
- Dave
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