xinput settings ignored

[Marco Cavallini]

Peter Hutterer ha scritto, Il 11/02/2010 00:26:
> On Wed, Feb 10, 2010 at 05:35:52PM +0100, Marco Cavallini wrote:
>> Hi I am facing to a weird behaviour with my ARM based touchscreen
>> device, xinput settings ignored and looks like I have a parallel input
>> device.
>>
>> X.Org X Server 1.7.4
>>
>>
>> # cat /dev/input/touchscreen0
>>   if I touch the screen I can see chars
>>
>> If I start xorg with
>>  xinit &
>> I can see the graphic application (xterm) and the cursor moves when I
>> touch the screen.
>> Cursor movements are not calibrated and axes are swapped.
>>
>> # cat /etc/X11/xorg.conf
>> ...
>> Section "InputDevice"
>>         Identifier      "atmel-ts"
>>         Driver          "evdev"
>>         Option          "SwapAxes" "1"
>>         Option          "Device" "/dev/input/touchscreen0"
>> EndSection
>> ...
> 
> Can I assume that the touchscreen talks the event API? because if not, some
> interesting behaviour can be expected.
> 
> 
>> Now, the weird stuff: If I do
>>  xinput set-int-prop "atmel-ts" "Device Enabled" 8 0
>> the command
>>  xinput test "atmel-ts"
>> doesn't return any coordinate and any event, but the cursor moves on the
>> screen.
>>
>> If I enable the device
>>  xinput set-int-prop "atmel-ts" "Device Enabled" 8 1
>> the command
>>  xinput test "atmel-ts"
>> works, and the cursor has the same behaviour (not cailbrable)
>>
>> May these info give you any idea about what's happening?
>> Any hint will be appreciated.
> 
> have you disabled hotplugging? chances are the device is added twice, once
> as part of the xorg.conf, once through HAL. if you disable the xorg.conf
> device, the other one will happily keep sending coordinates.

Hi Peter,
I tred removing the touchscreen from xinit.org

Results are:

1. touchscreen is still working
2. xinput --list --short  no longer detect the touchscreen device
3. and of course xinput-calibrator does not start

I'm quite puzzled, why touchscreen is still working?
How could I disable the current touch events and replace it with the one
defined in xorg.conf?
Option          "Device" "/dev/input/touchscreen0"

TIA
/marco