Edit: Read on forums that the Pi 3A+ falls into the same category as the 3B+ and newer so I installed the 64-bit version of Bullseye and followed the instructions here - https://github.com/pimoroni/hyperpixel4/issues/177; but to no avail. Having the same issue of coloured bars on the screen.
I have been using the Hyperpixel display with a Pi 3a+ for the past 2 years now.I needed to run a whole different program and so decided to swap out my SD card with another one (fresh install).
On boot I get a bunch of white/coloured bars on my screen but I’m able to SSH per usual.
I decided to skip Bullseye and use Buster instead (as I had done on the SD card running my previous hyperpixel setup). I continued by using the install script provided (curl -sSL get.pimoroni.com/hyperpixel4-legacy | bash) with options 3-0 (Square-2021 or later). Now on boot I’m facing the same issue (white/coloured bars) and no image.
I have repeated the setup with both 64-bit and 32-bit OSs but with no luck.
Is there something obvious I am missing? I haven’t run this setup from scratch since 2021 so feeling kinda lost here with the new instructions.
/boot/config,txt file:
# 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
dtoverlay=hyperpixel4
overscan_left=0
overscan_right=0
overscan_top=0
overscan_bottom=0
framebuffer_width=720
enable_dpi_lcd=1
display_default_lcd=1
dpi_group=2
dpi_mode=87
dpi_output_format=0x5f026
dpi_timings=720 0 20 20 40 720 0 15 15 15 0 0 0 60 0 36720000 4
Thanks in advance!