Why my touch screen can not work?

[Leo]

 >> My evdev version is xf86-input-evdev-2.4.99.901.
I still feel puzzled:
 1. But why XEV can not get the right position?I test XEV in my ubuntu10.04,
I can see the mouse's position changing.
How does xserver's event flows? e.g: kernel->dev/input/eventX -->read and
analyzed by evdev-->WM-->app ???

 2. I google the my question, they say if we support touchscreen, we'd
install tslib or evtouch,
I dont know what's relation between these component, Can evdev handle the
touch screen independently?
or it may depends on the other such as tslib or anything else...

 3. I can not access your blog, I dont know the information below meas what?
Does it tell me, evdev has been removed, it can not work, or still handle
the input events?
> > > [ 59.855] (EE) ioctl EVIOCGNAME failed: Inappropriate ioctl for device
 > > > [ 59.856] (II) UnloadModule: "evdev"
 > > > [ 59.856] (EE) PreInit returned NULL for "ADS7846 Touchscreen"      \

4. can you paste your article, send to me?  I try a lot , but still can not
access. I very appreciate what you did!

B.R
Leo

2010/11/18 Peter Hutterer <peter.hutterer at who-t.net>

> On Thu, Nov 18, 2010 at 09:28:47AM +0800, Leo wrote:
> > Dear Peter:
> >     I attach my evtest&&xev log.  it seems to work ok.
> > But there's something intersting, I just repeat operation on the
> different
> > place of touch screen.
> > Evtest can distinguish the position, you can have a look at the log, the
> ABS
> > coordinate keep changing,
> > While XEV I run on my device, this test seems not as what we want,  it
> can
> > distinguish the BTN_PRESS && BTN_RELEASE or
> > motion, but the position never changed.
>
> what version of evdev are you running? have you tried git master and/or an
> older version of evdev? If it works, can you bisect to it, I don't see
> anything in the evtest stream that should make this device not work.
>
>

>    I guess there's some place to transform the event as user want in Xorg.
> > evtest may read from the /dev/input/event3 directly, it's ok. But XEV
> Which
> > may depends on X11's transformation, so appears the different situation.
> >
> >     Please give some hints, thanks [?]
> >
> > BTW: I can not open the LINK [?]
> >
> http://who-t.blogspot.com/2010/11/how-to-ignore-configuration-errors.html
> > Is there any other website ?
>
> no, I just wrote this up today and it seems to work here.
>
> Cheers,
>   Peter
>
> > 2010/11/18 Peter Hutterer <peter.hutterer at who-t.net>
> >
> > > On Wed, Nov 17, 2010 at 09:34:49AM +0800, Leo wrote:
> > > > I prepare to port Meego(Linux based) to my devkit8000, follow the
> porting
> > > > guide
> > > > http://wiki.meego.com/ARM/Meego_on_B...d_from_scratch<
> > > http://wiki.meego.com/ARM/Meego_on_Beagleboard_from_scratch>
> > > > everything seems ok: show the home screen, launch the application,
> > > > But there's problem about touch screen. Meego can not recognize my
> > > behavior.
> > > > I'm not sure it's related with Xorg or driver. Here is my Xorg log:
> > > >
> > > > 59.837] (II) config/udev: Adding input device ADS7846 Touchscreen
> > > (/dev/i)
> > > > [ 59.837] (**) ADS7846 Touchscreen: Applying InputClass "default"
> > > > [ 59.841] (**) ADS7846 Touchscreen: Applying InputClass "evdev
> > > touchscreen "
> > > > [ 59.842] (**) ADS7846 Touchscreen: always reports core events
> > > > [ 59.842] (**) ADS7846 Touchscreen: Device: "/dev/input/event3"
> > > > [ 59.842] (--) ADS7846 Touchscreen: Found absolute axes
> > > > [ 59.842] (--) ADS7846 Touchscreen: Found x and y absolute axes
> > > > [ 59.842] (--) ADS7846 Touchscreen: Found absolute touchscreen
> > > > [ 59.843] (II) ADS7846 Touchscreen: Configuring as touchscreen
> > > > [ 59.843] (**) ADS7846 Touchscreen: YAxisMapping: buttons 4 and 5
> > > > [ 59.843] (**) ADS7846 Touchscreen: EmulateWheelButton: 4,
> > > EmulateWheelIner0
> > > > [ 59.845] (II) XINPUT: Adding extended input device "ADS7846
> Touchscreen"
> > > ()
> > > > [ 59.851] (II) ADS7846 Touchscreen: initialized for absolute axes.
> > > > [ 59.854] (II) config/udev: Adding input device ADS7846 Touchscreen
> > > (/dev/i)
> > > > [ 59.854] (**) ADS7846 Touchscreen: Applying InputClass "default"
> > > > [ 59.855] (**) ADS7846 Touchscreen: always reports core events
> > > > [ 59.855] (**) ADS7846 Touchscreen: Device: "/dev/input/mouse0"
> > > > [ 59.855] (EE) ioctl EVIOCGNAME failed: Inappropriate ioctl for
> device
> > > > [ 59.856] (II) UnloadModule: "evdev"
> > > > [ 59.856] (EE) PreInit returned NULL for "ADS7846 Touchscreen"
> > > > [ 60.102] (NI) OMAPFBSaveScreen: Dim backlight?
> > > >
> > > > who has the experience about these kind of problem, pls talk to me!
> > > > thanks very much
> > >
> > > does it work at all? do you see events come out of the device when you
> run
> > > evtest against it?
> > >
> > > as for the error message:
> > >
> http://who-t.blogspot.com/2010/11/how-to-ignore-configuration-errors.html
> > >
> > > Cheers,
> > >   Peter
> > >
>
>
>
>
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