RetroPie on Adafruit display 320x240 2.8" TFT+Touchscreen

shou

So i basically plan on creating a portable handheld console using the PITFT and Raspberry Pi 3 B with the help of this guidence (https://learn.adafruit.com/running-opengl-based-games-and-emulators-on-adafruit-pitft-displays/pitft-setup).
RetroPie itself does work flawlessly, but whenever i try to Install the display in order to run RetroPie on it, the display remains a whitescreen with the only difference that my HDMI Mirroring of the Raspberry doesn't provide the signal of the retroPie anymore.
I'd be sincerely thankful for any kind of help.

mitu

Most likely the installation script messes up the config.txt configuration file.

Can you post the contents of this file ? It should show up on the boot partition of the sdcard if you're using a PC and insert the sdcard there.

What version of RetroPie are you using ?

shou

@mitu Thanks for the quick response!

I am using the official retropie Raspberry Pi 2/3/Zero 2 W Imager.
Here are screenshots of the Config file:

mitu

You configuration forces the HDMI output and at the same time tries to enable the other display, I don't think that both can be active at the same time in this version of RasPi OS. The old page you mentioned uses a different method to enable and use the display, using the fbcp user-space utility, but that's no longer supported.

Try disabling the HDMI output by removing the hdmi_force_hotplug parameters and making sure you have this in your config.txt:

dtparam=i2c_arm=on
dtparam=spi=on
dtoverlay=pitft28-resistive,rotate=270,speed=80000000,fps=60

shou

@mitu
I outcommented hdmi_force_hotplug and pasted in the lines you wrote above, but there are unfortuantely no changes at all :/
Am I eventually missing some other essential system configurations, repositorys downloads, softwarecode or similar?

mitu

As far as I can tell from the (more) recent documentation available, the only configuration for the screen needs to be done in config.txt and any other configurations/installed packages are not necessary (any more).
I don't have experience with this and we don't get many configuration questions for this kind of displays, you may get better support if you ask directly int he Raspberry Pi forums.