Re: Touch screen driver for Acer T231H1

On Wed, 8 Nov 2023 16:48:32 +0100 I wrote:

> On Wed, 8 Nov 2023 15:47:32 +0100
> Tomek CEDRO <tomek@cedro.info> wrote:
> 
> > On Wed, Nov 8, 2023 at 11:01 AM Milan Obuch  wrote:
> > > years ago I bought Acer monitor with touch screen, but did not try
> > > to use it, it works for me just as an ordinary monitor. I decided
> > > to give it a try now...
> > > When plugged into USB port, I see just
> > > kernel: ugen0.6: <AcerA Bell T231HlTouchScreen> at usbus0
> > > line in console/dmesg output. Looking into usbconfig output in an
> > > attempt to get some info, I see
> > > # usbconfig -d ugen0.6 dump_all_desc
> > > ugen0.6: <AcerA Bell T231HlTouchScreen> at usbus0, cfg=0 md=HOST
> > > spd=FULL (12Mbps) pwr=ON (500mA)  
> > 
> > Hey there Milan :-) Some time ago I did work with Panasonic
> > Toughbook laptop touchscreen using x11-drivers/xf86-input-wacom
> > driver [1]. You may also try the multimedia/webcamd [2] or
> > sysutils/iichid [3] as the driver. Good luck :-)
> > 
> > [1] https://www.freshports.org/x11-drivers/xf86-input-wacom/
> > [2] https://www.freshports.org/multimedia/webcamd/
> > [3] https://www.freshports.org/sysutils/iichid/
> 
> Do you have some notes from Toughbook? Just to compare...
> 
> Also, according to sample config, x11-drivers/xf86-input-wacom uses
> /dev/input/event for input, I don't know how those get created. (There
> are four of them.)
> 
> With webcam, I am getting
> 
> # webcamd -d ugen0.6
> webcamd 4480 - - Attached to ugen0.6[0]
> webcamd 4480 - - Creating /dev/input/event6
> 
> and now I see some action on touch, but it looks like some calibration
> is necessary - I have two monitor setup and position set is correct in
> one axis but offset in the other.
> 
> As there is USB used for connection, iichid probably is no help for me
> :)
> 
> So I am a bit better now, with single monitor setup, it would probably
> work as is (a bit), so some more investigation is necessary.
> 

With webcamd, on single monitor it just works, the only issue is I need
to start it automatically when connected. I think I need some custom
config file for devd, however, something weird occured here. I tried
putting following file in /etc/devd directory, and after restarting
devd, webcamd is started as expected.

# Acer
#   Bell
notify 100 {
	match "system"		"USB";
	match "subsystem"	"DEVICE";
	match "type"		"ATTACH";
	match "vendor"		"0x0408";
	match "product"		"0x3001";
	action "/usr/local/sbin/webcamd -N AcerA-Bell-T231HlTouchScreen";
};

Problem is, for some reason, /dev/input/event6 file is being created,
but not recognized in X, nothing logged in Xorg.0.log. When starting
manually, the same file is recognized, logged as

[786.720] (II) config/udev: Adding input device AcerA Bell T231HlTouchScreen (/dev/input/event6)
[786.721] (**) AcerA Bell T231HlTouchScreen: Applying InputClass "libinput touchscreen catchall"
[786.721] (II) Using input driver 'libinput' for 'AcerA Bell T231HlTouchScreen'
[786.721] (**) AcerA Bell T231HlTouchScreen: always reports core events
[786.721] (**) Option "Device" "/dev/input/event6"
[786.851] (II) event6  - AcerA Bell T231HlTouchScreen: is tagged by udev as: Touchscreen
[786.855] (II) event6  - AcerA Bell T231HlTouchScreen: device is a touch device
[786.881] (II) event6  - AcerA Bell T231HlTouchScreen: device removed
[786.893] (**) Option "config_info" "udev:/dev/input/event6"
[786.893] (II) XINPUT: Adding extended input device "AcerA Bell T231HlTouchScreen" (type: TOUCHSCREEN, id 12)
[786.902] (**) Option "AccelerationScheme" "none"
[786.931] (**) AcerA Bell T231HlTouchScreen: (accel) selected scheme none/0
[786.932] (**) AcerA Bell T231HlTouchScreen: (accel) acceleration factor: 2.000
[786.932] (**) AcerA Bell T231HlTouchScreen: (accel) acceleration threshold: 4
[787.060] (II) event6  - AcerA Bell T231HlTouchScreen: is tagged by udev as: Touchscreen
[787.064] (II) event6  - AcerA Bell T231HlTouchScreen: device is a touch device

[809.940] (II) config/udev: removing device AcerA Bell T231HlTouchScreen
[809.941] (II) event6  - AcerA Bell T231HlTouchScreen: device removed
[810.056] (II) UnloadModule: "libinput"

(last 3 lines are from detachment).

Anybody with some hint? I need starting webcamd automatically, which
seems to work, but what makes X not recognize created input file?

Regards,
Milan