Ubuntu
linux package

  1. Bug #334914
  2. Comment #35

Comment 35 for bug 334914

Revision history for this message
Simon Holm (odie-cs) wrote : RE: [Bug 334914] Re: [jaunty] usb file transfer is very very slow

ons, 10 06 2009 kl. 09:26 +0000, skrev kulight:
> This is not an issue of using usb 1
> My device and port are both usb 2

But they are still used in USB 1.1 mode, see your dmesg that says "new
full speed USB device" and lsusb that shows the USB drive is on a bus
with a 1.1 device (this is very easy to see if you use lsusb without any
other options).

You might be able to force it into 2.0 mode by rmmod/modprobe -r all usb
related stuff and modprobing ehci_hcd. You'll have to umount all
partitions on your USB drive and disable everything else that uses USB
before you can do that.

This should bring very substantial performance improvements so please
try that.