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Date: Sat, 18 Apr 2009 16:36:10 -0700
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Stefan Sassenberg <stefan.sassenberg@gmx.de>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: /proc/bus/input/devices changing while booting
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Hi Stefan,

On Wed, Mar 25, 2009 at 05:20:56PM +0100, Stefan Sassenberg wrote:
> Hello,
>
> while booting, an init-script on my machine greps the Handlers entry of  
> a certain device (USB touchscreen) from /proc/bus/input/devices. It ends  
> with "event2", so I configure my software to listen for events in  
> /dev/input/event2. A few seconds later /proc/bus/input/devices changes,  
> the order of the devices is different and the Handlers entry for my  
> device ends with event1 making my device misconfigured and thus unusable.
>
> Can anybody explain that behaviour? How can I get the final eventX  
> device file?
>
> I'm using kernel 2.6.28.8 on an Intel Celeron, chipset ICH5.
>

Something causes disconnect of your touchscreen. I think this can happen of 
EHCI is loaded after UHCI/OHCI and they all figure our which devices should be 
driven by whom. Does it help if you compile EHCI in kernel or make sure it 
gets loaded first?

-- 
Dmitry