From mboxrd@z Thu Jan  1 00:00:00 1970
From: Kay Sievers <kay.sievers@vrfy.org>
Date: Thu, 01 Apr 2010 13:42:11 +0000
Subject: Re: System hangs when using USB 3.0 HD with on Ubuntu
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To: Jonas Schwertfeger <jschwertfeger@gmail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>, Douglas Gilbert <dgilbert@interlog.com>, David Zeuthen <david@fubar.dk>, linux-hotplug@vger.kernel.org, Sarah Sharp <sarah.a.sharp@linux.intel.com>, linux-usb@vger.kernel.org, USB Storage List <usb-storage@lists.one-eyed-alien.net>, Matthew Dharm <mdharm-usb@one-eyed-alien.net>, linux-scsi@vger.kernel.org, Lennart Poettering <lennart@poettering.net>

On Thu, Apr 1, 2010 at 15:32, Jonas Schwertfeger
<jschwertfeger@gmail.com> wrote:
> On Wed, Mar 31, 2010 at 6:36 PM, Alan Stern <stern@rowland.harvard.edu> wrote:
>> On Wed, 31 Mar 2010, Douglas Gilbert wrote:
>>
>>> > Stock udev comes with ata_id which I think may be invoked for this
>>> > device (but I'm not sure). Try moving it out of the way?
>>
>> Jonas, these sound like good things to try.  Find the ata_id and udisks
>> programs on your computer and rename them so they can't be run
>> automatically.  Then see if the problem still occurs.
>
> Renamed both /usr/bin/udisks

That's the commandline tool, you need to check for something like:
  /usr/lib/udisks/udisks-daemon

Can you run as root:
  udevadm test /sys/class/block/sd...
and post the output here. So we see what udev would run on bootup.

Thanks,
Kay