Thread: touchscreen support for Ubuntu [DELL ST2220T]

• using ubuntu 11.10 32bit unity

• having dell st2220t touchscreen monitor, reporting internally "lg display lgd-multitouch"

iam sort of stuck getting work.
status is, when plugged in gets recognized.
somehow works, not really.
reacts on touch, calibration borked. if use 2 fingers (multitouch) moves mouse around, in left upper corner not more 5cm left right, , 2cm down - while using whole screen touch.
if run "xinput_calibrator" reacts on upper left touchpoint, not second one. reported near first toouchpoint. (seems operating in 5cm area)

weird, somehow works, , reacts on touches - , somehow cant work.

@ spots in net reported people have work - assume more calibration, installation , softwareproblem rather not working @ all.

usefull touchscreen on market @ moment (high resolution1920x1080, ips-panel, multitouch, ...) , best can put angle want have - laying flat on table. no other touchscreen has @ moment, makes prefect touchscreen work with. thats why try put effort in it, , want work. unfortunately there not read on web touchscreen.
managed getting work "evdev".

tried add parts /etc/x11/xorg.conf
without success, not react on parts. more not know possible problem - or be.
why not recognizing touchscreen real touchdevice, , why there "touch x valuator not match pointer x valuator, pointer emulation may incorrect" in xorg log file?
not recognize mouse lg device.

maybe can out this, since iam stuck somehow.
maybe somone has specially monitor running ubuntu. reported worked fedora, , somehow debian squeeze. must possible work ubuntu somehow. (see links @ bottom)


evtest

code:

> evtest /dev/input/event7:    lg display lgd-multitouch  input driver version 1.0.1 input device id: bus 0x3 vendor 0x1fd2 product 0x64 version 0x100 input device name: "lg display lgd-multitouch" supported events:   event type 0 (sync)   event type 1 (key)     event code 330 (touch)   event type 3 (absolute)     event code 0 (x)       value  65535       min        0       max    32767     event code 1 (y)       value  65535       min        0       max    32767     event code 47 (slot)       value      0       min        0       max        1     event code 53 (positi659] (**) mytouchscreen: device: "/dev/input/event6" [  8317.660] (ww) mytouchscreen: don't know how use device on x)       value      0       min        0       max    32767     event code 54 (position y)       value      0       min        0       max    32767     event code 57 (tracking id)       value      0       min        0       max    65535

cat /var/log/xorg.0.log

code:

[  8317.723] (ii) config/udev: adding input device lg display lgd-multitouch (/dev/input/event7) [  8317.723] (**) lg display lgd-multitouch: applying inputclass "evdev touchscreen catchall" [  8317.723] (ii) using input driver 'evdev' 'lg display lgd-multitouch' [  8317.723] (ii) loading /usr/lib/xorg/modules/input/evdev_drv.so [  8317.723] (**) lg display lgd-multitouch: reports core events [  8317.723] (**) lg display lgd-multitouch: device: "/dev/input/event7" [  8317.724] (--) lg display lgd-multitouch: found absolute axes [  8317.725] (--) lg display lgd-multitouch: found x , y absolute axes [  8317.725] (--) lg display lgd-multitouch: found absolute touchscreen [  8317.726] (ii) lg display lgd-multitouch: configuring touchscreen [  8317.726] (**) lg display lgd-multitouch: yaxismapping: buttons 4 , 5 [  8317.726] (**) lg display lgd-multitouch: emulatewheelbutton: 4, emulatewheelinertia: 10, emulatewheeltimeout: 200 [  8317.726] (**) option "config_info" "udev:/sys/devices/pci0000:00/0000:00:04.1/usb1/1-4/1-4.1/1-4.1:1.0/input/input7/event7" [  8317.726] (ii) xinput: adding extended input device "lg display lgd-multitouch" (type: touchscreen) [  8317.726] (ww) touch x valuator not match pointer x valuator, pointer emulation may incorrect [  8317.726] (ww) touch y valuator not match pointer y valuator, pointer emulation may incorrect [  8317.726] (ii) lg display lgd-multitouch: initialized absolute axes. [  8317.726] (**) lg display lgd-multitouch: (accel) keeping acceleration scheme 1 [  8317.726] (**) lg display lgd-multitouch: (accel) acceleration profile 0 [  8317.726] (**) lg display lgd-multitouch: (accel) acceleration factor: 2.000 [  8317.726] (**) lg display lgd-multitouch: (accel) acceleration threshold: 4 [  8317.728] (ii) config/udev: adding input device lg display lgd-multitouch (/dev/input/mouse1) [  8317.728] (ii) no input driver/identifier specified (ignoring)

having nothing basic setup in /etc/x11/xorg.conf

reference links:

• http://www.innovationsts.com/blog/?p=3040

• http://debianforum.de/forum/viewtopi...29134&start=30

• https://groups.google.com/group/fa.l...7e23afdee025e8

• http://ubuntuforums.org/showthread.php?t=1765217&page=2

it isn't working me on ubuntu 12.04 + updates.

working on fedora 17 (i haven't tried multitouch).

Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Desktop Environments [ubuntu] touchscreen support for Ubuntu [DELL ST2220T]

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