disable lcd and use hdmi

[DirtyMacTruck]

Pi Model or other hardware: rpi 4
Power Supply used: official power supply
RetroPie Version: 4.8
Built From: Pre made SD Image on RetroPie website
USB Devices connected: keyboard
Controller used: snes
Error messages received: none
Verbose log (if relevant): na

My buddy gave me his old rpi 4 with lcd screen and case. I created an image using Raspberry Pi Imager. There is selected my model and picked retropie. Everything installed correctly. I was able to connect to my wifi, I was able to run the latest updates and everything is running smoothly. When I loaded up for the first time I noticed that my lcd screen was upside down (i guess this is a known issue with the lcd screen.) I fixed that by adding the following command.

lcd_rotate=2

I saved and rebooted and the screen flipped and everything is working fine.

My issue is I want to use the hdmi instead of the lcd screen so I can play on my tv. I can't seem to get the pi to use the hdmi port instead of the lcd. I wasn't able to find anything obvious in the raspi-config. I did try the following command but no luck.

ignore_lcd=1

Any help would be greatly appreciated.

[mitu]

How is the LCD connected ? Please post your entire config.txt.

[DirtyMacTruck]

@mitu This is connected using a DSI Ribbon and 4 jumper wires connected to the GPIO using pins 2,3,5,6. Here is my

# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details

# by default lcd screen is upside down.
lcd_rotate=2

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
hdmi_group=2
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Uncomment this to enable infrared communication.
#dtoverlay=gpio-ir,gpio_pin=17
#dtoverlay=gpio-ir-tx,gpio_pin=18

# 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

[mitu]

Try adding

display_default_lcd=0
ignore_lcd=1

to config.txt and see if that makes a difference.

[DirtyMacTruck]

@mitu

I gave that a try and neither screen would boot up. On my monitor it was showing no input detected. I tried both hdmi ports as well. I was able to ssh into it with no problems so i know it booted up fully.