I have followed these instructions, but have noted a few problems in addition 
the multitouch issue already mentioned:
1. After rebooting into Windows 8, touch NO LONGER WORKS.   I tried shutting 
down and rebooting several times with the same result.  It continues to work 
(for single touch) in Ubuntu.  
2. The stylus does not work.   It does not seem to be recognized as a wacom 
device.   The stylus does work in Windows 8.
3. Double-tapping does not seem to result in a double-click.
4. The instructions for setting up kernel builds needs a few more uses of "sudo"

I have noticed flakey behaviour before in Windows related to touch being
automatically disabled when the stylus is used then not getting
reenabled afterwards.   I don't know if that is relevant, since in that
case it is fixed by rebooting Windows.

I'm wondering if the driver is leaving the hardware in an inconsistent
state when shutting down and then Windows is unable to reinitialize it.
Either way, rebooting does not seem to reset the issue.

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https://bugs.launchpad.net/bugs/1121379

Title:
  Multiple finger touch fails on Sony Vaio Duo 11 running Ubuntu 12.10
  (N-Trig DuoSense MultiTouch)

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