"Error Creating SDL Window!": LCD-show

BeanFT

Just bought a 7 inch screen that I was going to use for the RetroPie, and when I put in the commands:

sudo rm -rf LCD-show
got clone https://github.com/goodtft/LCD-show.git
chmod -R 755 LCD-show
cd LCD-show/
sudo ./LCD7C-show

It refreshed, and the error in the title appears. When I tried to enter:
emulationstation
It just repeats the error. Any help is appreciated, thanks.

mitu

Please add more info about your setup, as detailed in https://retropie.org.uk/forum/topic/3/read-this-first.

Are you using a Pi4 ?

BeanFT

@mitu
Raspberry Pi 4 Model B
Mophie 20k power bank, with RAVIAD cable
retropie-buster-4.6-rpi4.img
Keyboard, 32GB USB, GeekPi controller, and 7 inch display

mitu

Check your config.txt and make sure you have the next 2 lines uncommented:

dtoverlay=vc4-fkms-v3d
max_framebuffers=2

BeanFT

@mitu Worked perfectly mitu, thanks a lot. Can you explain what that did?

BuZz

@BeanFT re-enabled the fkms gfx drivers. You either disabled them or a script did. A couple of other had this issues after filling some LCD guide, maybe there's some bad instructions on an external site.

BeanFT

@BuZz Got it working thanks to mitu. The manual just instructed on the code in the initial question. If you could, what does the "fx" and all those lines of code mean? Thanks again.

mitu

gfx = the GPU (Graphics) drivers, the Pi4 has a different driver which is enabled by the lines in the config.txt. As @BuZz said, the script doesn't add the lines to the file, it's probably geared towards previous Pi models, where the lines were not needed.

BeanFT

Perfect, thanks for the help mitu & BuZz 😁