From mboxrd@z Thu Jan  1 00:00:00 1970
From: Phillip Susi <psusi@cfl.rr.com>
Date: Sun, 21 Nov 2010 14:27:21 +0000
Subject: Re: false udev event
Message-Id: <4CE92C49.4050600@cfl.rr.com>
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References: <201011201810.oAKIAHxK019175@dcnode-02.unlimitedmail.net>
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To: linux-hotplug@vger.kernel.org

On 11/20/2010 01:10 PM, J. Bakshi wrote:
> ````````````````````````````````````
> ACTION="add", SUBSYSTEM="input", ENV{ID_CLASS}="mouse", ENV{DISPLAY}=":0.0", ENV{XAUTHORITY}="/home/joy/.Xauthority"  RUN+="/usr/bin/synclient TouchpadOff=1", RUN+="/bin/su joy -c 'DISPLAY=:0.0 notify-send %k; killall syndaemon ' "

This rule is fundamentally broken.  You are explicitly setting the 
environment to point to your .Xauthority file and the first instance of 
an X server, which of course, assumes that you are logged into that X 
instance at the time.  When this rule is processed, that is almost 
certainly not going to be true.

It also will run repeatedly for every input device in the system.  Maybe 
you meant ENV{ID_CLASS}="mouse" instead of ENV{ID_CLASS}="mouse"?