Set LCD display as main video output

otsuga

My rasp zero has a 3.5'' LCD screen and after downloading the drivers it turns on normally, but only displays the CLI for configuration when I press F4, it is set as a secondary display, when I connect my monitor via HDMI the EMulation Station opens normally, my intention is to make the EmulationStation open on the LCD display and consider it as the main and only video output. Even if I only have it connected it is still considered a secondary monitor.

How do I set my LCD display as the main video output?

mitu

Did you try adding

display_default_lcd=1

in config.txt ?

Please add some info about your setup, as detailed in https://retropie.org.uk/forum/topic/3/read-this-first. Post the config.txt you have now, surrounded by code blocks markers (```).

otsuga

@mitu

yes, but maybe im missing something

dtparam=spi=on

# Additional overlays and parameters are documented /boot/overlays/README

# Enable audio (loads snd_bcm2835)
dtparam=audio=on

[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
dtoverlay=vc4-fkms-v3d
max_framebuffers=2

[all]
#dtoverlay=vc4-fkms-v3d
overscan_scale=1
#hdmi_force_hotplug=1
dtparam=i2c_arm=on
dtparam=spi=on
enable_uart=1
dtoverlay=tft35a:rotate=270
display_default_lcd=1

i remove the commented part because of the size

mitu

OK, so display_default_lcd=1 is not enough.
In other various docs I've seen, there's a fbcon=map:10 stanza added to /boot/cmdline.txt - have you tried that also ?

otsuga

@mitu
Yes, that´s my cmdline.txt content:

dwc_otg.lpm_enable=0 console=tty1 console=ttyAMA0,115200 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait fbcon=map:10 fbcon=font:ProFont6x11 logo.nologo

i tried to boot without any monitor connected on hdmi port, but still setting the lcd as secondary, if that matter, iam using a rasp zero w 2

otsuga

@mitu

any ideia about how to proceed or where to search?

mitu

You can ask the vendor for support, using the current RetroPie image. Another option is to check whether a current RaspiOS (Bookworm) supports the screen and works better to make the LCD primary, a current release means you can ask for help in the RPI forums. Using the current RaspiOS you can use a manual installation of RetroPie, which is still in beta for this OS release, but should work for most things.