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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.

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9 views

Setting official touchscreen display boot-time brightness

I've got an official display, and having found other questions about setting the brightness I know I can change the brightness, and make a script that will run on boot, but that means the screen will ...
1
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0answers
16 views

Read pin (power led) from port expander on ic2-0 at config.txt

In config.txt you can have conditional booting based on the GPIO pin level, e.g. the gpio4=1 line. Is it also possible to access the pin on the GPIO port extender at i2c-0, or is this something ...
0
votes
1answer
19 views

Fallback kernel.img possible in config.txt

I have a raspberry with a customized OS. The image it should load is described in the config.txt on the boot partition. The image is called zImage and the line in the config.txt is: kernel=zImage I ...
0
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0answers
51 views

How to fix adafruit 7" display resolution problem on PI3?

I recently bought adafruit 7" display to be used with my PI3 to see if it will work. Well, it sort of works. The screen comes up everything is displayed but the resolution is screwed up. I have tried ...
0
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0answers
59 views

problem with video HDMI video output, distorted image

I am playing with a Rpi3 distro (Android Raspand) and I can't see anything. Image is twisted and distorted, please see how I am playing with config.txt following this guide https://raspberrypi....
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0answers
135 views

Red camera LED fails to turn off

I am using Raspbian 4.9.35-v7+ (3B+) and the camera: https://www.adafruit.com/product/1567. This may be flagged as a duplicate to previous questions under similar titles; however, none of their ...
0
votes
0answers
90 views

Error on init/boot '/init: line 27: can't create /sys/class/leds/led0/trigger'

Sorry for asking the same question twice, but it seems i can't fix the problem yet. I have a web server running on my pi. One day i found that my server is down and i try to access my pi using VNC and ...
3
votes
1answer
281 views

Does display_rotate still work?

I'm trying to use this runtime config.txt parameter under Raspbian Stretch and an external LED monitor on the HDMI port to no effect. It's hard to tell from posts here and elsewhere if this setting ...
0
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0answers
33 views

White screen on 7,5" touchscreen display on RPi2 with Ubuntu Mate

I have an RPi 2 and a 7,5" touchscreen display. When they are connected, my display shows only white pixels in a weird way (fading in and out). The display works if connected to another computer with ...
0
votes
0answers
255 views

RPi3 on Sony Bravia HDMI Produces Flickering Lines

After working for a while, and with various distributions and SDs, my Raspberry Pi 3 no longer properly works with my Sony Bravia. With the HDMI inserted it now displays flickering, changing lines. It ...
1
vote
1answer
133 views

Import settings from other file into config.txt

Is it possible to import settings from another file into config.txt? As I imagine config.txt example content: ... # Uncomment this to enable the lirc-rpi module #dtoverlay=lirc-rpi # Additional ...
2
votes
1answer
2k views

How do I force the correct screen resolution in /boot/config.txt?

I've recently set up a Retropie which I have plugged into my TV. If I have the right input selected on the TV before powering on the Pi, then the image looks crisp and wonderful. However if I turn on ...
2
votes
1answer
234 views

What pin numbering system is used in config.txt?

I am running Ubuntu Mate on a Raspberry Pi 2B. I would like to find which GPIO pin is currently used for the heartbeat, i.e. activity, so I can attach an external LED. The config.txt entry is like ...
9
votes
2answers
7k views

Enabling ARMv8 on Raspberry Pi 3 B

According to this article I should be able to switch to ARMv8 on my Raspberry Pi Model 3B, but I'm getting "rainbow screen" after adding to config.txt the line: arm_control=0x200 Why is it not ...
0
votes
1answer
520 views

VGA to HDMI adapter - modifying config.txt

I have a pre-installed micro SD card with NOOBs. But the instructions on the internet say to use a HDMI to VGA cable, I need to un-comment two lines of code in the config.txt file: #...
0
votes
2answers
3k views

What does “dtoverlay=dwc2” REALLY do?

Please don't point me to what it is used for, there are plenty of articles telling me how to make my Pi Zero an ethernet gadget. Putting "dtoverlay=dwc2" into /boot/config.txt appears to fix a known ...
0
votes
1answer
561 views

Trying to autorun Paho MQTT client script on boot up

I am running a Paho MQTT client on my raspberry pi (Stretch OS). This script recieves MQTT messages from a publisher script and then stores the data in a SQL database. As I added client.loop_forever() ...
0
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0answers
105 views

My Monitor wont turn on when connecting to Rassberry Pi 3 Model B?

I have a AOC 1619Sw Monitor and a Sony Bravia BX400. I will first explain with my monitor. I am using a Sandisk 8 GB class 4 SDHC card having raspbian in it. I got the power supply of a Lenovo charger ...
0
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0answers
92 views

For a minimal SD to enable USB Host boot, are bootcode.bin and config.txt sufficient?

For network booting, the according Foundation tutorial describes how one modifies the boot/config.txt on a "standard" SD installation to program the OTP memory in order to enable USB Host boot (by ...
3
votes
1answer
2k views

Unable to set GPU memory split on Raspberry Pi Zero W

I have looked everywhere (both on and off StackExchange) for this but cannot get an answer: I have a Raspberry Pi Zero W, which has 512MB of RAM total. I am running it headless, so I want to ...
0
votes
1answer
759 views

Restoring OTP bit after using MSD boot feature

I have read on the official Raspberry Pi website that it is possible, by adding a line, program_usb_boot_mode=1, to the /boot/config.txt file, to flash a Pi3 with the instruction to boot from USB ...
0
votes
1answer
64 views

Killing Power at GDM3 Login

I understand that killing power to a running pi without first shutting down can damage the SD card. Can Killing power at the GDM3 login screen also damage my SD card or do I need to run the GDM3 ...
1
vote
0answers
95 views

config.txt has no effect on the bash screen with archlinux arm

I have: rpi3 v2.0 http://os.archlinuxarm.org/os/ArchLinuxARM-rpi-3-latest.tar.gz the boot is on a FAT32 2gb sd card and the root is on a EXT4 8gb USB flash drive crt tv connected with an rca cable ...
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votes
3answers
16k views

How to edit config.txt

I am new to raspberry pi, and to linux. When I am trying to follow tutorials online, they sometimes require me to change /boot/config.txt. I am using the Jessie Version or Raspbian. (I am trying to ...
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vote
0answers
1k views

No display with “dtparam=audio=on”

This is my /boot/config.txt: http://termbin.com/0pq4 (1600x900 screen with HDMI to VGA adapter, turned vertical): # For more options and information see # http://rpf.io/configtxtreadme # Some ...
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0answers
559 views

How to change screen resolution for 2.4" monitor via config.txt?

I have tried changing the screen resolution of my 2.4" monitor to 320x240, but no luck. Here is my config.txt http://pastebin.com/UdpHKLfP I have no success changing the screen resolution. My ...
5
votes
3answers
2k views

Raspberry Pi 3 HDMI Not working

I have raspberry pi 3 model b and windows 10 PC. I downloaded Raspbian instead of NOOBS in order to be able to modify the config.txt file. But I'm still having the same problem, that my display doesn'...
2
votes
1answer
4k views

How to set the video resolution over composite?

I am trying to make a RPi 1 work nicely with an old LCD PAL TV (Sony KLV-20SR3). The video signal goes over composite (over SCART) because HDMI is not available. I am using LibreELEC. By default the ...
1
vote
2answers
3k views

How to prevent the “config.txt” file is empty after each start

I use a specific screen with my raspberry pi 3 that requires a command to set the resolution to him, otherwise it displays nothing. It works fine, the problem is that after each start the file "config....
0
votes
1answer
954 views

config.txt - Should I use CEA or DMT for different types of VGA monitors?

When using an HDMI to VGA adapter, converter, or adapter converter (in particular when using this one found on Amazon.com), should I use the setting for CEA (hdmi_group=1) or DMT (hdmi_group=2)? More ...
1
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2answers
1k views

Disable Overscan not working

I am using Raspbian Jessie Lite and I want to display a website in iceweasel kiosk mode. To realise this I created an .xsession file which gets executed when booting. When the website displayes a ...
0
votes
1answer
1k views

Raspberry Pi B+ Overclocking: Force Turbo not working [Solved: Undervoltage Problem]

Good day, I am overclocking my raspberry pi. I have selected the turbo option from the raspi-config. I have found out however that the Pi was not running consistently at 1GHz. I have tried setting ...
0
votes
2answers
2k views

Raspberry Pi B+ Overclocking

Good day, May I ask if it is true that if I activate turbo on the raspi-config, the pi doesn't always run at the maximum speed at 1Ghz. Is it safe to set force turbo = 1 at the config.txt to force ...
2
votes
1answer
577 views

Video Composite android tv raspberry pi

I downloaded and installed android tv on my raspberry pi (link here) and tuned off the hdmi hot plug but it does not seem to display. what am i doing wrong?
1
vote
1answer
1k views

Windows 10 IoT Core, Pi 3 Config.txt

Where should I place my config.txt for my Windows 10 IoT Core Raspberry Pi 3 setup? I was reading this, but didn't know for sure if I am simply supposed to place it in the root of the SD card or not?
1
vote
1answer
725 views

Is 'dwc2' limited to USB direct connections?

The instructions for setting up a direct-connect RPi Zero over USB have me add dtoverlay=dwc2 on a new line to `config.txt', and insert modules-load=dwc2,... in cmdline.txt. Are these settings ...
0
votes
1answer
541 views

Make a Lightweight Linux

I need a Lightweight or Simple Linux and run in my RaspberryPi. For the first, download a kernel file and Run make menuconfig: According to the image, I don't understand .config file and config it....
2
votes
1answer
641 views

i2c on a rpi-basic-image created with yocto

I'm attempting to get the i2c bus to work from a raspberry pi image created from yocto. I have looked at other peoples solutions but they are all o do with raspbian or some other flavour of os. My /...
2
votes
1answer
4k views

over_voltage possible values

Does anyone know this configuration 'over_voltage': What does it do? How can I configure it? (using config.txt and write the value?) What are possible values? What is the difference between it and '...
0
votes
1answer
694 views

Raspberry Pi resetting across reboots [duplicate]

My RPi 3 seems to have run into a strange problem. Everytime I reboot it, it seems to reset all my settings, namely Keyboard layout and taskbar icons some other setting as well. Also if after a ...
1
vote
1answer
7k views

`arm_freq` in config.txt on Raspberry Pi 3 model B

I would like to know if it is safe to edit the config.txt file on a Retropie image to change the arm_freq=800 to arm_freq=1200 since it will be running on a R-pi 3 model B?
0
votes
2answers
3k views

Raspberry Pi HDMI not Working

I have a Raspberry Pi 3 & a Windows 10 PC. I have extracted the NOOBS file and saved the extracted file on an SD Card. I tried to do the first boot on my Raspberry Pi with the SD Card inserted and ...
0
votes
2answers
2k views

“chmod u+w config.txt” results in “Operation not permitted.”

I am trying to use chmod to allow me to change config.txt. I am using NOOBS on the Raspberry Pi Zero. chmod u+w config.txt results in "Operation not permitted."
4
votes
2answers
4k views

config.txt : Hostname

As you might have guessed from the title, I would like to know if it is possible to change a RasPis hostname from the config.txt file on the SD card. I'm making a lot of SDs from a custom image, and ...
1
vote
1answer
168 views

How to Create shortcut that appends text to /boot/config.txt

I am trying to do the following with a shortcut on the Desktop : echo "dtoverlay=pi3-miniuart-bt" >> /boot/config.txt systemctl disable hciuart I have tried to put it in a script but when I ...
0
votes
0answers
643 views

Signal from Pi not recognized by DP monitor

I'm trying to switch Raspberry Pi to a new monitor, but monitor complains about not getting HDMI signal. The old monitor was attached via HDMI-DVI cable, while new monitor has HDMI-HDMI cable and then ...
-1
votes
1answer
139 views

Raspbian Wheezy config.txt overclocking

I looked on the Raspberry Pi documentation here and I was trying to overclock my Raspberry Pi 2. But on the documentation page, I found options like force-turbo and other options that I didn't find in ...
2
votes
2answers
9k views

How to find the config.txt on noobs

I am trying to use an hdmi screen with my pi but in order to do that I need to go into the config.txt... I cannot find the config.txt in my NOOBS sd card. Is there a way to find that or make one?
1
vote
2answers
485 views

I'm having trouble setting up my config.txt file to work with hdmi display

I plugged in my pi to my hdmi screen and I've been getting a screen with just lines on it going up to down. It makes sense as this hdmi screen does not have a video scaler so unless you get the ...
0
votes
1answer
190 views

changes in config.txt are not applied

I edited the /boot/config.txt file to adapt to my monitor settings: # uncomment if you get no picture on HDMI for a default "safe" mode hdmi_safe=1 and hdmi_mode=58 But when I reboot, the hdmi ...