Update: bentiss from #xorg-devel IRC channel told that my device is not handled by hid-ntrig and is apparently handled by hid-multitouch in the kernel.
I followed the instructions at http://lii-enac.fr/en/architecture/linux- input/multitouch-howto.html#report and I attach the descriptors.txt file produced from report.py script. ** Attachment added: "descriptors.txt file produced from report.py script (see http://lii-enac.fr/en/architecture/linux-input/multitouch-howto.html#report )" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/1121379/+attachment/3531526/+files/descriptors.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-input-evdev in Ubuntu. https://bugs.launchpad.net/bugs/1121379 Title: Multiple finger touch fails on Sony Vaio Duo 11 running Ubuntu 12.10 (N-Trig DuoSense MultiTouch) Status in “xserver-xorg-input-evdev” package in Ubuntu: Confirmed Bug description: N-trig DuoSense multitouch screen on Sony Vaio Duo 11 (model SVD1121P2EB) ultrabook/tablet hybrid does not function as expected with ubuntu 12.10. How to reproduce the bug: 1. Boot up Sony Vaio Duo 11 to Ubuntu 12.10 and login to untiy 2. Use mouse/trackpad to Open a nautiuls window 3. Use a mouse/trackpad to Open a terminal window and run "tail -f /var/log/Xorg.0.log" 4. With the focus to the terminal window touch inside nautilus window with one finger. Nautilus window takes focus, as expected. Nothing is appended to Xorg.0.log. 5. Touch with one finger inside terminal window. The terminal window takes the focus, as expected. Nothing is appended to Xorg.0.log. 6. Touch with one finger inside nautilus window and do a drag gesture. A rectangle select area follows hand's move. Nothing is appended to Xorg.0.log. 7. Touch again with one finger inside nautilus window and and do a drag gesture. Nautilus window is scrolling up and down, as expected. 8. Touch with 2 fingers into nautilus window. The following Error line is appended to Xorg.0.log: (EE) [dix] N-trig DuoSense: unable to find touch point 1 9. Do any gesture with the two fingers (eg. spread). The following error lines are repeated during the gesture: [ 2530.712] (EE) BUG: triggered 'if (!(event->device_event.flags & (1 << 5)))' [ 2530.712] (EE) BUG: ../../dix/touch.c:628 in TouchConvertToPointerEvent() [ 2530.712] (EE) Non-emulating touch event [ 2530.712] (EE) [ 2530.713] (EE) Backtrace: [ 2530.713] (EE) 0: /usr/bin/X (xorg_backtrace+0x36) [0x7f261cfadb76] [ 2530.713] (EE) 1: /usr/bin/X (0x7f261ce05000+0x7dbdf) [0x7f261ce82bdf] [ 2530.713] (EE) 2: /usr/bin/X (0x7f261ce05000+0x1380b9) [0x7f261cf3d0b9] [ 2530.713] (EE) 3: /usr/bin/X (0x7f261ce05000+0x137c65) [0x7f261cf3cc65] [ 2530.714] (EE) 4: /usr/bin/X (0x7f261ce05000+0x13a5d3) [0x7f261cf3f5d3] [ 2530.714] (EE) 5: /usr/bin/X (0x7f261ce05000+0x15bc8f) [0x7f261cf60c8f] [ 2530.714] (EE) 6: /usr/bin/X (mieqProcessDeviceEvent+0x1b5) [0x7f261cf8f385] [ 2530.714] (EE) 7: /usr/bin/X (mieqProcessInputEvents+0xf8) [0x7f261cf8f4a8] [ 2530.714] (EE) 8: /usr/bin/X (ProcessInputEvents+0x9) [0x7f261ce98789] [ 2530.714] (EE) 9: /usr/bin/X (0x7f261ce05000+0x557d2) [0x7f261ce5a7d2] [ 2530.715] (EE) 10: /usr/bin/X (0x7f261ce05000+0x4456a) [0x7f261ce4956a] [ 2530.715] (EE) 11: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7f261adb076d] [ 2530.715] (EE) 12: /usr/bin/X (0x7f261ce05000+0x448ad) [0x7f261ce498ad] [ 2530.715] (EE) 10. Touch with one finger an other window. Focus is not transfered to the touched window. Expected behavior: The focus should be transfered to the touched window. 11. Touch with one finger inside nautilus window and do a drag gesture. Window is scrolling up and down and the above error lines are repeated at Xorg.0.log. Expected behavior: No error messages should be generated. 12. Remove the finger from the screen and move the mouse around the screen. Nautilus window is scrolling according to mouse movement. Expected behavior: no scrolling should happen at nautilus window. 13. Click with the mouse inside nautilus window. The rectangle selector appears and follows mouse movement. Expected behavior: A single click should not trigger the rectangle selector. After these steps mouse and touch have a strange and unstable behavior: Mouse movement erroneously selects text without holding down the mouse button, clicks and touches at windows do not give focus, clicks and touches to buttons to not cause a press event, alt+tab is not functioning. Touching with more fingers (3 or 4) produces a similar error with point number varying from 0 to 3 (e.g. (EE) [dix] N-trig DuoSense: unable to find touch point 2), and after that any gesture fails producing the above error messages. I attach: * geistest output * lsb_release -a output * lshw output * lsinput output * lspci -vnvn output * mtdev-test output * ntrig-calibrator output * uname -a output * cat /proc/version_signature output * Xorg.0.log I can perform any testing and reporting on Sony VAIO Duo 11 device. I have quite advanced technical skills on ubuntu, compiling, config files e.t.c. I would appreciate any guidance in order to investigate and finally solve this bug. 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