lcd doesn't turn on after timeout turn off

[sandro]

I have a stm32mp157 module.
I installed the minimal image
STM32MP1-OLinuXino-SOM-bullseye-minimal-20220413-094751.img.7z
from the olimex website.

i installed X server:

apt-get install  xinit

so I changed card1 from card0 in the file
/usr/share/X11/xorg.conf.d/92-etnaviv.conf

because otherwise the server doesn't start.

Now everything is working and I can start the graphics applications.

But if the screen turns off due to the timeout, I can't turn it back on by touching the touchscreen.

Can you recommend a solution?

thanks