Questions tagged [raspberry-pi]

Low-cost single-board computer the size of a credit card. Also check the Raspberry Pi SE: http://raspberrypi.stackexchange.com/

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rmmod : Module lan78xx is builtin

I am working with Li-Fi components and I intend to install it's corresponding driver. However, I am unable to install the driver as I encounter an error rmmod : Module lan78xx is builtin
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How to cross compile QEMU for armhf/arm64 on x86_64

I'm trying to cross compile QEMU for armhf for my Raspberry pi (because when compiling on the pi, checkinstall fails to package it to a deb, see this). I searched a lot but didn't find anything that ...
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skiping systemd generators possible? recipe for replacing generators by native unit files?

I'd like to speed up the boot process on a rpi zero w. The systemd generator phase took around 1.7s on that system. By disabling some generators where I think they are not used in this setup the time ...
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Checkinstall fails to package QEMU to a deb

I compiled QEMU for my Raspberry pi and want to package it to a deb so I don't need to compile it every time I reflash (it takes a few hours). but every time I run sudo checkinstall I get errors (...
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Duplicating audio in pure ALSA for playback on local device and streaming via trx

I am trying to achieve a multi-room audio setup in my house using Raspberry Pis. How can I get VLC playing simultaneously out the local headphone port while also streaming it to other devices via trx? ...
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To change directory of an already existing application in linux [closed]

I am using linux system. I have already installed tensorflow application in some directory (say A) now i want to change the tensorflow package directory into some other directory (say B). So how ...
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Turning off activity and power leds on Raspberry Pi 3 running Debian (NOT RASPBIAN)

I have a Raspberry Pi 3 currently hosting a web server. I'd like to turn off the activity leds, and power led as they consume energy for nothing. How can I do this using debian ? Under Raspbian it's ...
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Shell script on Raspberry Pi fails to copy files from usb0 to directory

I am trying to write a shell script to copy specific files from an archive USB thumb drive to my Rasberry Pi 4b. The script is, in my opinion, brain dead simple. cp /media/usb0/archive/file1.zip /home/...
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How to mount several partitions with symlinks on different architecture?

I have RasPi image with 3 partitions. On RasPi they are mounted on /, boot/ and mydirectory/. I can mount them on x86 with mount and losetup. Unfortunately, symlinks appear dead, because paths are ...
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what are the leftovers from the previous builds of Qt?

it's been a while that I am trying to cross compile Qt for my Raspberry pi 4 on a lite version of OS (that has no desktop, no x server ..) on my Ubuntu 18.04 I tried many times and I changed the ...
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28 views

Compressing multiple files to .gz misbehaving

I had 100 images from a Raspberry Pi project and in order to transfer them to another computer, I used the "Compress" interaction after selecting all of the images and using the right click ...
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Prepare on-the-fly flushable image for raspberry pi

I have a base Raspberry Pi SD image that I flash on all my micro sd cards when I need it. Depending on the use, I will then have to re-mount the image an change: the /boot/config.txt to activate some ...
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30 views

Syntax highlighting uses “invisible” colors when using VIM in SSH from Windows 10

I have gone very old school but it's is great fun. vim is great at editing without GUI so connecting to a remote data collecting PI it gives a very simple stack to maintain code and settings. It works ...
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Error while booting Yocto dunfell/gatesgarth for Rpi3

I have build Yocto dunfell branch for Raspberry pi 3. After successful build, flashed SDCard. while booting pi, it throws following error on HDMI port! enter image description here I am able to ...
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142 views

Is it possible to install Linux on an SD card, AND use it as external storage for Android?

I'd like to install a bootable Linux system on a micro SD card, AND be able to use it as external storage for other devices, such as my Android phone. The plan: Linux ARM on a Raspberry Pi 4. If I ...
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1answer
27 views

I am trying to execute a script that pushes to git every x minutes as a service, but git uses 100% CPU and high amounts of RAM

I am trying to execute a script that pushes to git every x minutes as a service, but git uses 100% CPU and high amounts of RAM while seemingly doing nothing. (I checked after 8 minutes and it was ...
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How to get to monitor mode Kali Linux on Rasberry pi 4? (airmon-ng, iwconfig don't work)

Method 1: Airmon-ng - (don't work) airmon-ng check kill airmon-ng start wlan0 Make wlan0mon, everything looks fine, but after some time (around 50 seconds) using some tools like airgeddon or airlay-...
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Is it possible to restrict USB webcam resolution and fps system-wide on linux?

I have a Raspbian buster running on Raspberry Pi 3 model B with SVEN USB2.0 web camera. My goal is to make a simple meet.jit.si client for my grandparents. The problem is: when Chromium opens the web ...
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Ubuntu Server 64bit on RaspBerryPi randomly stop working

I know what I'm going to ask is a pretty general question, but it's my first Linux installation and I don't know how to start looking where the problem is. I have a RaspberryPi 4 / 8GB ram with Ubuntu ...
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Lost control of Raspbian (Buster) system after modifying X11 (/etc/X11) Xsession script

I've unfortunately managed to lock myself out of my own playground (Raspberry Pi 4B, Raspbian Buster) after attempting what was originally going to be a solution to autostarting a network-kvm (synergy)...
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How do start network settings in Debian Raspberry PI in a non-root user

Every time I log in to my user account "bob" I have to use these commands (with sudo or in the root account) to connect to the WiFi: wpa_supplicant -B -D wext -i wlan0 -c /etc/wpa_supplicant....
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How do I make omxplayer playing /dev/video0 on Raspberry Pi

I am using the following script to play an HDMI video capture input connected to one of the USB ports of Pi: #!/bin/bash rm /tmp/vbuf mkfifo /tmp/vbuf ffmpeg -loglevel -8 -y -f v4l2 -input_format ...
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How to get a new build Kernel running

I am trying to build and run a realtime kernel for respective on my Raspberry Pi 4B 4GB. Therefore I followed the guideline here. I cross-compiled it several times as described there and also I tried ...
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How to get two USB webcams to operate simultaneously on Raspberry Pi 4 running openSUSE Leap 15.2?

How do I get two USB webcams to operate simultaneously on a Raspberry Pi 4 running openSUSE Leap 15.2? I ultimately want this to work with Motion and seem to have eliminated that as I also fail with ...
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28 views

Raspberry PI (local) openSSL help: red-line through HTTPS fix?

I recently installed SSL on my RPi.. after using a few different tutorials.. I finally got the https:// url to resolve into showing the webpage content. However.. I had to 'ignore' the SSL warning (...
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LUKS auto decryption with key file fails, please help me debug

I have a Raspberry Pi with attached, via USB, HDD drive inside Orico chassis with a separate power source. I encrypted this drive with the command: cryptsetup luksFormat /dev/sda Then, I created key ...
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28 views

Output of command “file <filename>” changes after opening the file with nano?

Background: I'm running a script on a raspberry pi, and the script writes logs to a file. The script take some time to finish so sometimes the pi experiences power outage and shuts down. Whenever this ...
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Connectivity error: DLP projector - RPI 4

I am using nanodlp (software for RPI) with a DLP light projector (wintech PRO6500) and a raspberry 4, with the final objective of 3D printing. I have seen that the raspberry allows me to define /dev/...
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138 views

How to run 32-bit (armhf) binaries on 64-bit (arm64) Debian OS on Raspberry Pi?

Original Problem I have aarch64/arm64 version of Debian on a Raspberry Pi 3 B+ (2017) or Pi 4 (using an image from here). Now I want to run 32-bit (armhf/armv7) versions of some applications/libraries ...
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28 views

arecord is crashing after 1 min while scheduled with cron on raspi

i'm trying to record a several hours of audio each day at 8:00. for the cron+arecord test i used intervalls of 10 minutes and tried to record for a duration of 8 min (480 sec): */10 * * * * arecord -f ...
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Bluetooth mouse strange behavior

Trying to connect mouse and keyboard pair that connects via same Bluetooth USB dongle to PC to my Raspberry Pi. Keyboard works fine while mouse does some strange lag. I was expecting to find dongle ...
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23 views

Send audio input over airplay

My setup: Destination: A linux server (CentOS 8) running shairport-sync. For all intents and purposes this is an airplay receiver. Source: A raspberryPi that has a USB dongle for a microphone input. ...
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Can bcache have non-zero dirty cache forever?

I created a Raspberry Pi based bcache on SSD with a HDD based RAID 1 array. After populating the RAID with few TB of content, bcache showed 10% dirty cache. That would be expected, since I have /sys/...
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Filter non-IP traffic on STA wlan0 interface

I want to filter inbound and outbound non-IP traffic going through the wlan0 interface of a Raspberry Pi 3B+ (connected via Wi-Fi to an AP). iptables / ip6tables only seem to affect IP traffic, so ...
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68 views

Cannot type '|' (pipe) symbol on terminal in Raspberry Pi Lite OS

I want to use the pipe command, but whenever I type a pipe symbol (|) on the terminal, it displays a tilde (~) instead. There are also several other characters for which this happens. I'm using a ...
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66 views

Write to linux serial port from bash script

Hi I am using a raspberry pi and trying to write to a usb serial port in a bash script. I found echo would be the right way to do it. Also I want to test if the port is busy or not when writing. So I ...
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31 views

wpa_supplicant ignoring white- and blacklist from config

Due to connection instabilities with my repeater, I am trying to lock my RPi4B (running Raspberry Pi OS 10 / Buster) to directly and always connect to the main router as AP. However this is dual-band ...
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28 views

Raspberry Pi 4 xRDP/Xorg Permissions

I installed Raspberry Pi OS Lite which I believe is Debian based, I installed the required packages in order to get remote desktop (xrdp) running, I'm actually amazed I managed to get that to work as ...
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152 views

kernel: OF: overlay: WARNING: memory leak will occur if overlay removed

How can I find the cause of these errors? journalctl -p 3 -b Dec 12 15:19:22 raspberrypi kernel: OF: overlay: WARNING: memory leak will occur if overlay removed, property: /soc/i2c@7e804000/status Dec ...
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28 views

Unable to connect via SSH to when eth0 is disconnected

I've seen a few similar questions, to this one, but have not found a solution. I'm working on a Raspberry Pi and wiring up a second Ethernet port (ultimately it will be the only port on a Pi Zero, ...
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21 views

Use adb (android debug bridge) in systemd-nspawn container

I would like to use adb inside an systemd-nspawn container. Unfortunately I cannot access the phone inside the container (connected via USB). pi@debian-buster-64:~ $ export ADB_TRACE=usb pi@debian-...
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1answer
27 views

Create hotspot in raspbian

I have a RPI 2 with raspbian OS. I have a WI-FI USB adapter too that it is connected to the pi. I want to use wlan0 as a hotspot but any try get failed. I tried this guide and some open source project ...
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AnyDesk 6.0.1, keyboard Alt Gr combinations does not work from linux to linux

From any Linux Distro to any Linux Distro, with AnyDesk 6.0.1 and older versions, Alt Gr combinations does not work, for example is not possible to write: "€@#[]{}". In my specific case I ...
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21 views

Easy script to uncomment a line in squid config file

I am creating a script to easily uncomment and add lines to the /etc/squid/squid.conf file as when the squid package is installed, the line acl allow localnet is always commented. Is it possible to ...
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40 views

How to control PulseAudio latency for zeroconf-publish network sinks

I have a USB sound card connected to a Raspberry Pi that I would like to use remotely. I've configured PulseAudio on the Pi with zeroconf: load-module module-native-protocol-tcp auth-ip-acl=127.0.0.1;...
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30 views

How to remove Qt on ubuntu and raspberry (after cross compilation)

I just cross compiled QT on ubuntu for my raspberry https://github.com/PhysicsX/QTonRaspberryPi/blob/main/qt5.14.2onRaspberrypi this is the code that I followed. I think that I did something wrong ...
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1answer
29 views

How to switch between USB Dongle and Wifi connection in Ubuntu

I have installed Ubuntu 20 server in my Raspberry pi board which I have connected with Wifi. I have installed a 3G Dongle to the ubuntu server. Now the 3G Dongle connection is also working fine. Right ...
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2answers
47 views

User python app service does not start on boot

My user service which is a python script does not run on boot. It runs on raspbian OS as user pi. As most of these questions go I can start the service and it runs fine with systemctl --user start ...
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97 views

Setting up a NordVPN gateway on my Raspberry Pi

Goal Set up NordVPN on my Raspberry Pi and use it as a gateway. Current set-up Raspberry Pi2 running Arch ARM, connected to my router via ethernet cable NordVPN account nordvpn installed on my Rpi ...
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46 views

Connection closed by <IP> port 22 Raspberry pi 4

In short: I have issues connecting via ssh to my Raspberry Pi 4. It worked fine for a while, but now I suddenly get the Connection closed by <IP> port 22 error message. Now, with a bit more ...

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