LVGL can't get touchscreen events after keyboard unplug

How-to
1

Hello

My application run fine with Waveshare 7inch HDMI LCD touchscreen monitor. Touchscreen input is connected via USB cable.

After I unplug standart USB keyboard I can’t get touchscreen events to my event handler. What might be wrong?

2

A bit more information would be helpful.
Rasberry pi?
OS?
endev.c ?