3.5 Kuman touch screen

Mofapilot

Hello,

I use a RPi 3, a IQAudio DAC+ and mentioned display (Waveshare clone) for my project.
I used this tutorial: #3859 to get my LCD-screen working.
The system first boots naturally on the HDMI screen and changes to the LCD midway. So far, everything runs as expected. Some seconds after the login screen appears, it changes back to the HDMI screen and loads the local browser. Anybody knows how to solve this?

hondagx35

Hi Mofapilot,

this is because you have two displays installed on your system (HDMI and the 3.5" TFT).
Rune starts the local browser always on screen 0 and this seems to be your HDMI port.
Change the settings in /root/.xinitrc or disconnect your HDMI monitor.

    #!/bin/bash
    export XDG_CACHE_HOME="/tmp/.cache" &
    export DISPLAY=":0" &

    # start the touchscreen calibration utility
    # needed for some screens (Pollin 7" tft)
    # for this to work you have to disable loading midori
    #xinput_calibrator &

    # turn off display power management
    xset -dpms &

    # turn off screensaver
    xset s off &

    # start the window manager without titlebar and mouse
    matchbox-window-manager -use_titlebar no -use_cursor no &

    # install multimedia keyboard shortcuts
    xbindkeys &

    # start midori in privat mode with fullscreen display
    midori -p -e Fullscreen http://localhost

Frank

Mofapilot

I tried starting RuneAudio without the HDMI monitor. Doesn't work, the touch screen gets stuck on the login screen (the blinking cursor simply disappears).

Editing the file doesn't work either. I think, the one on my RPi looked exactly the same like the one above, but copy- pasted anyway, to no avail.

Mofapilot

Does nobody know a solution?

hondagx35

Hi,

Editing the file doesn't work either. I think, the one on my RPi looked exactly the same like the one above, but copy- pasted anyway, to no avail.

Try to change

export DISPLAY=":0" &

export DISPLAY=":1" &

please post the output from:

ls /dev/fb*

Frank

Mofapilot

Sadly, changing from 0 to 1 doesn't change anything in its behaviour (without HDMI monitor).

ls /dev/fb* gives: /dev/fb0 /dev/fb1

Mofapilot

Any suggestions?

Mofapilot

Thank you for your support, but I think, I'll change to Kodi