Could you try to capture the usbmon and post the result? See below for how to use usbmon:
http://www.mjmwired.net/kernel/Documentation/usb/usbmon.txt thanks, -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/834476 Title: siletransfer to usb drive very slow in ubuntu 11.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/834476/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs