Ubuntu – Incomplete file transfers to USB drive with Nautilus

If you really did not experience the problem before, it may be either a problem with the updated kernel or a hardware problem (with either the USB controller or the phone).

The first one seems unlikely to me, but you can check whether this is the case by downgrading your kernel to the version you had before in 11.04 ; for the second suggestion, check the following link :

http://www.thinkwiki.org/wiki/Problem_with_USB_2.0 .

Basically there is a good chance you'll be still able to use the USB connection if you'll drop down the USB 2.0 support, although it will give you the painful 12 mbit/sec, i.e about one Mb per second ; but it would probably be rather stable. If the phone is the only device that brings you the problem, I would have simply stayed with USB 1.* for it.

Another hypothesis would be that you have earlier used a 32-bit version of Ubuntu 11.04 and the bug appeared when you have switched to a 64-bit version .

Then I suggest you to try a 32-bit LiveCD and see if the problem persists .

PS. Here is an article explaining the procedure of unbinding the driver ( the spam protection engine prevents me from giving more links at once ) ) :

http://lwn.net/Articles/143397/

AFAIK, "Remove safely" just unmounts the device, and removes it from udev. It doesn't send any command to the drive to shut down.

On the contrary, udisks --detatch does so: (udisks manpage)

--detach device_file [--detach-options options]
       Detaches (e.g. powering down the physical port the device is
       connected to) the device represented by device_file using a
       comma-separated list of options.