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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.

35
votes
1answer
114k views

Is setting `max_usb_current=1` to give more power to USB devices a bad idea?

I've been searching around for more information on the /boot/config.txt configuration directive max_usb_current, trying to find out exactly what happens when that is set to 1, but it's hard to find ...
22
votes
3answers
12k views

Why won't my Raspberry Pi overclock?

I edited the file /boot/config.txt to increase the CPU speed to 800MHz. dmesg includes the following line bcm2835-cpufreq: Freq 800000->700000 (min=700000 max=800000 target=700000 request=700000) ...
19
votes
4answers
20k views

Easiest way to return to a known good state when overclocking

If I try to overclock my Pi, I want to go up to the point where the Pi won't boot anymore, or won't be stable enough. At this point, I want to come back to the latest known good settings for the /...
17
votes
4answers
31k views

How do I increase the terminal font size?

I have a Raspberry pi B, using Debian, just rigged up with a 3.5 inch TFT-LCD monitor via VGA. The text size in command line mode is too small to read, so I would like to increase its size, and one ...
13
votes
1answer
47k views

Calibrate overscan settings

There are options to adjust the the overscan settings in /boot/config.txt. # uncomment this if your display has a black border of unused pixels visible # and your display can output without overscan ...
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 ...
7
votes
2answers
6k views

File config.txt with multiple lines is not working

I've been trying to get XBMC (Raspbmc to be exact) working om my Raspberry Pi. After hours of work and a lot of stupid mistakes (who knew FAT32 wasn't made for Linux), I made it work. But now I'm ...
6
votes
1answer
44k views

HDMI output for 1080p

Need the right configuration to set the standards for the config.txt file to set an PAL LCD 1080p. I have tried hdmi_group set to 0, to use the preferred group. That tweak gave me sharp text although ...
5
votes
1answer
2k views

REALLY force Raspberry Pi to send audio via HDMI

I wanted to use my Raspberry Pi with a very old video projector which was not capable of processing audio signals. So I bought an HDMI-audio-extractor (Ligawo 6518725 HDMI Extractor), as the PWM ...
5
votes
1answer
3k views

Raspberry Pi corrupts the SD Card often

I currently start using different Raspberry Pis to monitor my (Wi-Fi) network. (OS: Raspbian) Unfortunately one Pi often corrupts the SD Card and I definitely don't just plug off the power cable. It ...
5
votes
1answer
3k views

Problems with Raspberry Pi Resolution

I recently purchased a Raspberry Pi and I hooked it up to my 22" Acer monitor. The monitor has a resolution of 1680x960. I tried several resolutions in the config.txt and some of them make the ...
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'...
4
votes
4answers
20k views

How to override config.txt settings during boot?

From the default NOOBS installation I have installed Raspbian. It seems NOOBS has added some settings to the config.txt file, where one of them is: hdmi_force_hotplug=1 which forces video to be on the ...
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 ...
4
votes
2answers
8k views

Raspbmc + HDMI + AV receiver = screen changes resolutions

This is my setup: Raspberry Pi w/Raspbmc 8GB Transcend SDHC card Yamaha RX-V1900 receiver Westinghouse 40" flat panel TV When the Pi is directly connected to the TV by HDMI, the output is sharp (TV ...
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 ...
3
votes
1answer
3k views

How do I generate/configure config.txt for raspberry Pi2 using Yocto?

I am using Yocto to build a custom image for my Raspberry Pi2. Followed this tutorial in portuguese and this one in english. QUESTION 1: Why my config.txt (added by hand) isn't loaded? I was able to ...
3
votes
1answer
2k views

Set HDMI refresh rate

I would like to set my HDMI refresh rate to 100 MhZ as supported by my TV, however using the code below always set it to 60 MhZ: hdmi_group=1 hdmi_mode=40 Any idea why or suggestions on how to ...
3
votes
1answer
303 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 ...
3
votes
1answer
301 views

Default resolution change between firmware versions

I just updated my Pi image so that I could use the Raspberry Pi B+ and there was a subtle change regarding the default resolution that the Pi uses when it is not plugged into any monitor at boot time ...
2
votes
2answers
3k views

How is memory split by CMA?

The post at http://www.raspberrypi.org/phpBB3/viewtopic.php?f=29&t=19334&p=218282&hilit=cma#p217665 mentions that:- gpu_mem_512=316 cma_lwm=16 cma_hwm=32 In the above ARM has 96M always. ...
2
votes
2answers
1k views

How do I automate removal and re-enabling overscan as I move the pi between HDMI and TV?

I use my Pi (with raspbian) in two locations, at the desk I have a DVI-D monitor hooked to the HDMI output and in the livingroom there is a big old thick television using PAL composite.. I would like ...
2
votes
2answers
18k views

Why do I not have a /boot/config.txt fle?

I have a Raspberry pi B, and downloaded and installed "2012-10-28-wheezy-raspbian.img." I am using a 3.5 inch VGA TFT-LCD monitor, where the tiny font was hard to read, but I have managed to increase ...
2
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 ...
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 '...
2
votes
2answers
2k views

Why is the L2 cache disabled by default on Raspbian Jessie?

When I ran vcgencmd get_config int to check if max_usb_current was applied, I noticed a peculiar line on the output: pi@srv0 ~ $ vcgencmd get_config int arm_freq=1000 config_hdmi_boost=5 core_freq=...
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
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 ...
2
votes
1answer
578 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?
2
votes
2answers
3k views

NOOBS shows black screen unless I switch to to another video setting and then back to HDMI

When I first boot my Raspberry Pi into NOOBS, I get a blank screen until I push keys 3 or 4 and then select 1, switching it to HDMI again. Then, it works fine and I can install Raspbian, but after I ...
2
votes
1answer
236 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 ...
2
votes
1answer
650 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
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?
2
votes
1answer
1k views

How to install Ubuntu MATE without HDMI output?

I'm new to Raspberry Pi 2, I just bought a Raspberry Pi 2 1.1, I don't have a TV or monitor with HDMI input, so I have to install Ubuntu MATE without it, is there any way to use composite video? i ...
2
votes
1answer
121 views

Used raspi-config for i2c option

I used: sudo raspi-config to select the I2C option but it got into the config.txt file appended to the previous line. I since fixed that, but want to know what I did wrong or is it a bug?
2
votes
1answer
158 views

Latency variation

I have a problem using my raspberry pi 2 for applications that need low latency. I wrote a c++ GPIO routine that reads a high resolution quadrature ttl encoder. It then updates a counter and adds it ...
2
votes
1answer
274 views

RPi Model B 512 MB--FreeBSD--text running off screen

I am having a problem with FreeBSD, wherein I cannot get the text to be constrained within the area of a TV (composite). I have been using framebuffer_height and framebuffer_width in /boot/msdos/...
2
votes
2answers
1k views

Supporting multiple monitor EDID override profiles

I would like to be able to switch my Pi between several different physical monitors that I have (one at a time). The screens are not all the same type or resolution. For most of the monitors, the Pi'...
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?
1
vote
1answer
7k views

Raspberry Pi 2: HDMI resolution to 1280x1024 60 hz

I tried setting the resolution 1280x1024 60hz unsuccessfully in Debian Jessie (AlienDeb) I use the config /boot/firmware/config.txt: hdmi_ignore_edid=0xa5000080 hdmi_drive=2 hdmi_group=2 hdmi_mode=...
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
727 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 ...
1
vote
1answer
169 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 ...
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....
1
vote
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 ...
1
vote
1answer
1k views

HDMI worked in another display, stopped working now on a LG!

My Raspberry Pi Model B Board works with RCA output, but do not work with HDMI, after it shows the splash screen. (curiously enough, it shows the splash screen, then a white screen with an option to ...
1
vote
0answers
11 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
vote
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 ...
1
vote
0answers
143 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 ...
1
vote
1answer
135 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 ...