In Linux systems, this file must be edited as root.Īny changes will only take effect after you have rebooted your Raspberry Pi. This is read by the GPU before the CPU and Linux are initialised.
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Once distribution image is flashed on micro SD Card, you will be able to explore this partition from whatever external PC (Windows, MAC or Linux).Ĭonfig.txt is a simple plain text file which setup system configuration parameters which traditionally are stored using a BIOS. In many Linux distributions (like Raspberry PI OS but also Debian, Fedora, Ubuntu, etc) HDMI video options can be set from a file named “config.txt” available in SD card boot partition. Ok, if you are here you are (quite) sure that hardware is ok.īefore going in linux configuration, please get list of supported resolutions by your HDMI monitor/TV. Power Supply capacity (I always suggest to use at least a power supply capable to give 2,5 / 3 A, expecially if you could use your RPI also with external devices).If this test fails, you could need to re-check: If this test is passed you can move on next paragraph. Before Changing Resolution: Check Hardwareīefore starting with configuration files to manage and edit (as classic Linux geek habits), you need to check that available hardware is ok.įirst test involves Raspberry PI + HDMI cable: if it is possible to you, connect them to a different HDMI monitor / TV (maybe from your friend, if you don’t have a second one).
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In this tutorial I’m going to show you how to configure your Raspberry PI OS to start from first boot with a pre-defined resolution.
This happens also with different distributions installed on Raspberry PI. This kind of problem doesn’t involves OS working state by itself (networking and SSH will work if configured from flashing phase and remotely accessed), but makes your device not usable from directly attached monitor. In these cases, both Raspberry PI OS Lite and Desktop distributions can suffer problems in showing their interfaces on screen, resulting in unusable video. With the increasing hardware variety of monitor / TV, using Raspberry PI with a different HDMI monitor or TV can lead to video issues from first boot.
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