I am using a raspberry pi for a retro robot project. I am making use if an old black and white 5 1/2 inch CRT TV with a composite input as the screen (which is my robot's face). I was using a raspberry pi 3, but decide my project would benefit from something with a bit more power, so now using a raspberry pi 4. Unfortunately I cannot get the Pi4 to correctly work with the TV (the Pi3 still works fine).
I have used a freshly flashed buster image and created the ssh and wpa_supplicant.conf files in order to access the Pi through ssh from my windows laptop.
The Pi3 just seemed to automatically work after first boot. The Pi4 just gives me a blank tv screen after first boot, but must be booting up as I can access it via ssh.
My config.txt file is as below:
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# For more options and information see # http://rpf.io/configtxt # Some settings may impact device functionality. See link above for details # 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=1 #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
I have already navigated the forum as best I can and discovered the tvservice command. The result of the tvservice -s command is as below
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state 0x120001 [TV is off]
When I try to force power on the SDTV mode with tvservice --sdtvon="PAL 4:3" I just get a flickering on the TV.
Any suggestions on what I am doing wrong and how to get this working?
Thank is advance for any help.