Bummer, this new Dell Latitude XT is showing some attitude. It looks like n-trig hardware is plugged into the hardware via USB interface and once you boot inside dock while other USB devices are connected the touchscreen wont load.
Read more about it here and here.
Update: Read more on Wikipedia.
Update: What the hell? Its 2009.07.17 now and I still get the same error! This just isn’t funny anymore.
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NtrigApplet
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Can’t connect to driver:
Failure to open Device
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OK
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NtrigApplet
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Can’t connect to driver:
Failure to open Device
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OK
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The book of inspiration 
i have same problem… what i shall do?
Comment by elwi — November 18, 2009 @ 9:07 am
Either update your dell drivers or detach from dock and restart.
Comment by zproxy — November 19, 2009 @ 6:40 pm
I am having the same issue. Even if I undock and restart I get the same message
Comment by Mike — September 15, 2011 @ 8:08 pm
Cool and nice update thanks for sharing it.
Comment by mobi ritz — August 1, 2013 @ 12:30 pm