I have a hp touch-smart 610, and with ubuntu 11.10 everything works out of the box. I tried with the live cd to ubuntu 12.04 and sadly, the touch-screen don't work. I would like to install 12.04, but don't want to lose the touch-screen.
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        I have the same device on which I installed ub 12.04 (64 bits), I also asked a question about it a while ago. For me also the touchscreen does not work from the live CD. You need to install, then update the system, and then remove a certain section from a Xorg configuration file to make things "work".
See here my question and the solution: Mouse selects everything on its own
(I do not guarantee that it will work for you. Also I do not multitouch, just singletouch. The device should however be able to do multitouch.)
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        Looks like it was affected by this bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/913164
Must be fixed in linux 3.2.0-24.37. Search the page for "3008" to get an additional info.
 
    
    
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