Can't invert screen for Official Raspberry TouchScreen

[Szwajowy]

Hello,
I'm trying all day different kind of configurations to invert the screen and touchscreen on official 7inch display.

I've tried adding video=DSI-1:800x480@60,rotate=180, and it works when system is booting, but after chrome is opened it turns into black screen with some graphical glitches at bottom.

Using xrandr with inverted/normal parameters doesn't do anything, but left and right works fine (which is weird).

It seems like the problem is with the Chrome, but I don't have any clue on what to do..

Did somebody successfully setup FullPageOS 0.14.0 from latest nightly on Raspberry Pi 3B+ with Official Touchscreen 7" ?

[Szwajowy]

Now I noticed that it does work after waiting some time.

What I did currently:

1. modified /boot/firmware/config.txt by:
   • adding dtoverlay=vc4-kms-dsi-7inch,invx,invy at the bottom of the file
   • commenting out display_auto_detect=1
2. modified /home/"login"/scripts/start_gui by replacing:
   • DISPLAY_ORIENTATION=normal with DISPLAY_ORIENTATION=inverted
3. modified /opt/custompios/scripts/start_chromium_browser
   • added --use-gl=desktop

After that my screen is rotated, touchscreen is working properly, cursor is not upside down and finally chrome is no glitching graphically!

[Szwajowy]

It's still not full answear.
What to do with the inverted mouse cursor?

[Szwajowy]

@guysoft I would add this --use-gl=desktop either to build or at least to README/FAQ or some other place :)

[guysoft]

@Szwajowy you are welcome to add it to the wiki here:
https://github.com/guysoft/FullPageOS/wiki/FAQ#how-to-rotate-the-screen-to-a-vertical-position

[guysoft]

This should hold the answer, if it doesn't its would help if someone fixes it:
https://github.com/guysoft/FullPageOS/wiki/FAQ#how-to-rotate-the-screen-to-a-vertical-position