X11 based application does not respond to touch after first touch ( ILI210x Touchscreen)

[Vishnu Motghare]

Hi Peter,

Thanks for your reply.

I'm using xf86-input-tslib
<https://layers.openembedded.org/layerindex/recipe/301409/>  & not
libinput. can xf86-input-tslib
<https://layers.openembedded.org/layerindex/recipe/301409/>  handle the
pressure? Also how to capture events from tslib input driver?

Regards,
Vishnu

On Thu, 8 Jun 2023 at 08:30, Peter Hutterer <peter.hutterer at who-t.net>
wrote:

> On Wed, Jun 07, 2023 at 01:04:02PM +0530, Vishnu Motghare wrote:
> > Hello All,
> >
> > X11-based applications like xterm & xinput_calibrator do not respond to
> > touch after the first touch.
> >
> > We have an ILI210x Touchscreen controller & the kernel version is 5.15,
> > touch was working fine with the 5.4 kernel version with Xterm &
> > xinput_calibrator
> >
> > This is the  Commit
> > <
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/input/touchscreen/ili210x.c?h=v5.10.182&id=3a492e4403ee2e3442397230d68e26e81525af90
> >
> >   added
> > in the kernel to report the pressure value & after this, no X11-based
> > application works after the first touch
> >
> > Do we need to add any setting in xorg.conf to handle the pressure value
> > reported by  ILI210x Touchscreen?
>
> Most likely you're using the xf86-input-libinput driver for touchscreens
> (unless you explicitly changed it to use the evdev driver). In that case
> you can check with `libinput debug-events` to see what libinput produces
> - the xorg libinput driver is a fairly thin wrapper and this should give
> you a good indication of where things go wrong.
>
> libinput record works either way and shows you the events produced by
> the kernel.
>
> also, fwiw libinput does not handle pressure for touch screen events so
> this patch shouldn't have made a difference in userspace. So there's
> most likely some other event missing, libinput record should show this.
> Probably best to file an issue against libinput for that.
>
> Cheers,
>   Peter
>
>
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