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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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Can you identify your touchscreen model with lsusb? – int_ua May 2 '12 at 6:37
If I use the code 'xinput --list' I can see it is a Quanta OpticalTouchScreen. – Tom Gundersen May 7 '12 at 16:30
Does lsusb | grep Quanta show something? Is it 0408:3000? – int_ua May 7 '12 at 22:21
Bus 001 Device 004: ID 0408:3008 Quanta Computer, Inc. – Tom Gundersen May 8 '12 at 15:25

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:

Must be fixed in linux 3.2.0-24.37. Search the page for "3008" to get an additional info.

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It help partly, I go the touch-screen to work, but only with one finger tap and not with two finger tap – Tom Gundersen May 13 '12 at 12:57
I think you need to file a new bug report with apport-bug linux – int_ua May 13 '12 at 19:49

Same thing with 12.04 and LXDE, eeepc 701 with eGalaxy touchscreen, seems solved with the update in this ppa via Ubuntu Tweak: "xorg-edgers fresh X crack", which installed the package xserver-xorg-core 2:1.12.3+git20120709.

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