Questions tagged [config.txt]
This file is parsed by the GPU before the initialisation of the ARM core. It can be used to set various parameters to alter the behaviour of the system, such as display resolution or overclocking settings.
165 questions
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1 answer
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Mixing PWM and audio
We have some CM3 and now CM4 mounted on custom boards. audio is enabled on both via config.txt with: dtparam=audio=on Audio is on pins 40 / 41 (I think, I have a schematic for a similar but different ...
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1 answer
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No sound on Raspberry Pi 4B and Raspberry Pi OS Lite
I decided to reinstall my Raspberry Pi 4B which had the full Pi OS, with the Pi OS lite, because I do not need the whole graphical thing to run steamlink. When it was done, I noticed that I did not ...
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Corrupted screen after configuration change
I was trying to get scrot to execute properly and made some edits in the boot config file. I had edited the config to use FKMS and increase GPU memory to see if that would allow scrot to capture a ...
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Mapping PWM chip and channel in c# to PWM, Function and/or ALT
I'm following the instructions in this document in order to get hardware PWM working. I added this line to my /boot/firmware/config.txt dtoverlay=pwm,pin=18,func=2 According to the docs this should ...
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2 answers
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PrimeOS 2.1.0 rpi 4b dsi display dont work
Good morning. I have a dsi touch screen thats works with all distros android on my rpi 4b, but dont work with PrimeOS 2.1.0. The rainbow appears but after, don't show anything. All distros android ...
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1 answer
435 views
Minimal config.txt for enabling UART0
I am attempting to connect to the UART0 on my Raspberry Pi 4B. I have shorted together GPIO pins 14 and 15 (pins 8 an 10 on the header). I then run picocom /dev/ttyAMA0 and see if it's echoing (it ...
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2 votes
1 answer
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When is the 'disable-bt' dtoverlay necessary?
I have a Pi 3B+. There are a number of resources out there that suggest it is necessary to enable the disable-bt overlay in order to make use of the serial UART on GPIO 14 & 15. E.g., this ...
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480x320 display HDMI - blank after boot
I am trying to get to work mini HDMI chinese 480x320 display. I want to display only console output, and that resolution is good enough for it. Display is known to be ok, during boot it shows good ...
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rPi 4 two screen configuration without the gui
I tried plugging two screens with different dimentions into this pi4 and the result is a mess. What is more, I started with PiOS 64 lite, and am running the i3 desktop. Loving i3, but of course ...
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1 vote
1 answer
1k views
What filename does auto_initramfs look for?
From the config.txt documentation: If auto_initramfs is set to 1, look for an initramfs file using the same rules as the kernel selection. Presumably it's looking for something with either no suffix,...
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1 vote
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Configuring the Raspberry Pi 4 B as a USB (HID) Gadget?
I am new to Raspberry Pi and recently got a RB Pi 4 intending to use it as a mouse/keyboard for my laptop. The problem is that I can't find valid information about how to configure the Pi 4 as a USB ...
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Updating RaspberryPi Ubuntu Server 20.04 to 22.04 caused usercfg.txt to not be honored
I asked on askUbuntu a while back but didn't get much traction... should have known there was a stack for Raspi... So I've been putting my HMDI output configuration in /boot/firmware/usercfg.txt ...
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356 views
raspberry 400 hdmi output does not follow config.txt
Have my new raspberry 400 with current Raspberry OS and connected a TV by the official micro-HDMI-cable. There is no problem getting an image, but it always goes to 1080p@50 mode (TV tells me that, ...
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-1 votes
2 answers
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MAX31586 configuraiton using overlay
I want to read three MAX31586s using a Raspberry pi 3B. Two are connected on the spi0 and I can configure the maxtherm on config.txt to work. For the third one, maxtherm doesn't work with spi1, at the ...
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142 views
Cannot set MAC address for Pi Zero W USB ethernet gadget
I am trying to create a portable debian system that runs on pi zero w using the 0W image from debian-downloads, I downloaded the image and flashed it to an sd card using etcher.io, next I edited ...
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