touchpanel inputs stop being propagated to the core pointer?

[Roland Freikamp]

Hi,

I have a problem with the input-system:
- X suddenly stops to accept touches from a touchpanel
  (connected via USB).
- Re-connecting USB re-enables the touchpanel.
- "xinput disable 7; xinput enable 7" (7=id of the touchpanel) also
  re-enables the touchpanel.

It looks like the input-events of the touchpanel suddenly stop to be
propagated to the "Virtual core pointer":
- "xinput list --long 7" still shows the touches and correct positions
- but the positions in 'xinput list --long "Virtual core pointer"' are frozen

Any ideas/hints?


System:
- Hardware: Raspberry Pi 3B+
- OS: Raspbian 11
  (Linux raspberrypi 5.10.103-v7+ #1530 SMP Tue Mar 8 13:02:44 GMT 2022 armv7l GNU/Linux)
- X: X.Org X Server 1.20.1
  $Xorg -version

  X.Org X Server 1.20.11
  X Protocol Version 11, Revision 0
  Build Operating System: linux Raspbian
  Current Operating System: Linux raspberrypi 5.10.103-v7+ #1530 SMP Tue Mar 8 13:02:44 GMT 2022 armv7l
  Kernel command line: coherent_pool=1M 8250.nr_uarts=0 snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1 video=HDMI-A-1:800x480M at 59 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000  console=ttyS0,115200 console=tty1 root=PARTUUID=e6f63882-02 rootfstype=ext4 fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles
  Build Date: 04 January 2022  10:24:42AM
  xorg-server 2:1.20.11-1+rpt1+deb11u1 (https://www.debian.org/support)
  Current version of pixman: 0.40.0


Best regards,
Roland