Touch display pligun: screen not correctly detected

Volumio Development Bug reports
1

Github issue #385 github.com/volumio/volumio-plugins/issues/385

I have a RPI3 with the official touch screen. On rotating the screen via the web ui, the display rotates, but the touch does not.

Symptom/effect is here:
volumio-plugins/plugins/miscellanea/touch_display/index.js, lines 975 to 980

 if (rpiScreen) { 
   bootstring = 'lcd_rotate=2' + os.EOL + 'display_hdmi_rotate=2' + os.EOL; 
 } else { 
   bootstring = 'display_lcd_rotate=2' + os.EOL + 'display_hdmi_rotate=2' + os.EOL; 
   transformationMatrix = '-1 0 1 0 -1 1 0 0 1'; 
 }

I would think rpiScreen would be set here but apparently somethings broken:

 // detect Raspberry Pi Foundation original touch screen
        exec('/bin/grep "^rpi_ft5406\\>" /proc/modules', { uid: 1000, gid: 1000 }, function (error, stdout, stderr) {
          if (error !== null) {
            self.logger.info('No Raspberry Pi Foundation touch screen detected.');
          } else {
            rpiScreen = true;

Output if I run the command in terminal (ssh):
rpiScreen is not set, but it should be.

$ /bin/grep "^rpi_ft5406\\>" /proc/modules
rpi_ft5406 16384 0 - Live 0x00000000
2

Thanks for reporting. I think I have discovered the reason for the issue. Could you still post or PM the results of cat /boot/config.txt
The fix for your problem will probably be part of the changes I am currently working on in order to enable the plugin to make use of the new userconfig.txt instead of boot.txt (which will preserve rotation and GPU memeory settings in case of a system update).

3 
$ cat /boot/config.txt
initramfs volumio.initrd
gpu_mem=32
max_usb_current=1
dtparam=audio=on
audio_pwm_mode=2
dtparam=i2c_arm=on
disable_splash=1
hdmi_force_hotplug=1
#### Touch Display setting below: do not alter ####
lcd_rotate=2
display_hdmi_rotate=2


#### Volumio i2s setting below: do not alter ####
dtoverlay=hifiberry-dacplus

Note that I changed the script so it writes ‘lcd_rotate’ instead of ‘display_lcd_rotate’.

4

So, initially you had “display_lcd_rotate” in /boot/config.txt? That would be the wrong entry I expected after your report on GitHub.

Thanks for your feedback!

5

To add:

the logfile does contain this:

2019-12-03T08:53:21.532Z - info: Raspberry Pi Foundation touch screen detected.
2019-12-03T08:53:21.567Z - info: Using Xorg socket /tmp/.X11-unix/X0
2019-12-03T08:53:21.666Z - info: Backlight module of a Raspberry Pi Foundation touch screen detected.

So the screen is detected but rpiScreen is unset somewhere along the code…?
My Javascript knowledge is too poor to debug this.

6

Problem has been localized. I hope to be able to commit a bug fix soon. :slight_smile:

7

The issue should be remedied with version 1.1.4 of the plugin which has been released just lately.