Official touchscreen problem

[Tim Curtis]

I don't see anything suspicious in System info. Try examining the status of the localUI service for some sort of catastrophic  error.

systemctl status localui

Below is what I get on one of my Pi's with 7" Touch thats working perfectly.

Code:

pi@rp5:~ $ systemctl status localui
● localui.service - Start Chromium Browser
  Loaded: loaded (/lib/systemd/system/localui.service; disabled; vendor preset: enabled)
  Active: active (running) since Sun 2018-09-16 10:45:57 EDT; 14s ago
Main PID: 16515 (xinit)
  CGroup: /system.slice/localui.service
          ├─16515 /usr/bin/xinit -- -nocursor
          ├─16517 /usr/lib/xorg/Xorg :0 -nocursor
          ├─16527 /bin/bash /home/pi/.xinitrc
          ├─16533 /usr/lib/chromium-browser/chromium-browser --enable-pinch --kiosk --touch-events --disable-touch-drag-drop --enable-touchview --enable-pinch --window-size=8
          ├─16543 /usr/lib/chromium-browser/chromium-browser --type=zygote
          ├─16545 /usr/lib/chromium-browser/chromium-browser --type=zygote
          ├─16615 /usr/lib/chromium-browser/chromium-browser --type=gpu-process --field-trial-handle=1022043128677331848,5708664293242774446,131072 --gpu-preferences=KAAAAAAA
          ├─16760 /usr/lib/chromium-browser/chromium-browser --type=renderer --disable-touch-drag-drop --touch-events --field-trial-handle=1022043128677331848,570866429324277
          └─16771 /usr/lib/chromium-browser/chromium-browser --type=renderer --disable-touch-drag-drop --touch-events --field-trial-handle=1022043128677331848,570866429324277

Sep 16 10:45:57 rp5 xinit[16515]:         (++) from command line, (!!) notice, (II) informational,
Sep 16 10:45:57 rp5 xinit[16515]:         (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
Sep 16 10:45:57 rp5 xinit[16515]: (==) Log file: "/var/log/Xorg.0.log", Time: Sun Sep 16 10:45:57 2018
Sep 16 10:45:57 rp5 xinit[16515]: (==) Using system config directory "/usr/share/X11/xorg.conf.d"
Sep 16 10:45:59 rp5 xinit[16515]: Fontconfig warning: "/etc/fonts/fonts.conf", line 160: blank doesn't take any effect anymore. please remove it from your fonts.conf
Sep 16 10:46:00 rp5 xinit[16515]: [16533:16756:0916/104600.723464:ERROR:bus.cc(394)] Failed to connect to the bus: Could not parse server address: Unknown address type (exampl
Sep 16 10:46:01 rp5 xinit[16515]: ATTENTION: default value of option force_s3tc_enable overridden by environment.
Sep 16 10:46:01 rp5 xinit[16515]: [16615:16615:0916/104601.662156:ERROR:sandbox_linux.cc(375)] InitializeSandbox() called with multiple threads in process gpu-process.
Sep 16 10:46:01 rp5 xinit[16515]: [16533:16533:0916/104601.681357:ERROR:gpu_process_transport_factory.cc(1029)] Lost UI shared context.
Sep 16 10:46:01 rp5 xinit[16515]: [1:10:0916/104601.754767:ERROR:command_buffer_proxy_impl.cc(133)] ContextResult::kTransientFailure: Failed to send GpuChannelMsg_CreateComman