Questions tagged [raspberry-pi-os]
Do not use this tag. It was intended for issues common to Raspberry Pi OS, but Raspberry Pi OS - Bullseye is significantly different to its predecessor. Use the version specific tags raspberry-pi-os-buster or raspberry-pi-os-bullseye.
177
questions with no upvoted or accepted answers
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answers
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Why doesn't extract-vmlinux work with Raspbian's /boot/kernel*.img?
To monitor if a reboot is necessary, I wanted to compare the version of /boot/kernel*img against the version of the running kernel.
To get the kernel version of a compressed linux kernel image (...
- 1,200
2
votes
1
answer
2k
views
Specified qdisc kind is unknown when using tc netem to emulate latency on Raspbian
When I tried to emulate latency using tc. I get the following error on Raspberry Pi 3B+.
sudo tc qdisc replace dev eth0 root netem delay 100ms
Error: Specified qdisc kind is unknown.
These are the ...
2
votes
0
answers
517
views
C# .NET Core application cannot open serial port
I'm running a .NET Core application on Raspberry Pi OS (32-bit Debian).
pi@raspberrypi:~ $ cat /etc/os-release
PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"
NAME="Raspbian GNU/Linux&...
- 175
2
votes
0
answers
2k
views
How do I get back to GUI?
Recently my RPi started switching to a terminal on boot. I cannot get out of it and when i boot it says "Time Synchronization error" I've tried setting it manual, automatic and nothing has ...
- 21
2
votes
0
answers
811
views
Raspberry pi 4 doesn't detect i2c devices
I am working on a gas flow sensor SFM4100. It's communcation protocol is i2c. And according to gasses bus adresses are changing. For o2 gas, address is 2.
When I connected the all pins according to ...
- 49
2
votes
0
answers
189
views
No Recommended Software menu after updating and upgrading
I'm a beginner using a Raspberry Pi 3. I ran the commands, sudo apt-get update and sudo apt-get dist-upgrade, rebooted and logged back in and there is no menu for Recommended Software.
I also ran the ...
- 21
2
votes
0
answers
47
views
Recommened way to ensure Raspberry Pi connectivity
what's the recommended way to ensure connectivity throughout the time?
I'm using wifi in this case, on a Raspberry PI 4 w/ Raspbian 10 buster.
I noticed that it's losing connectivity randomly after ...
- 121
2
votes
0
answers
654
views
Enable desktop on the raspberry pi
I was trying out booting my pi4 into a chromium kiosk mode for a demo and ran the commands from the following post:
Open chromium full screen on start up
@xset s off
@xset -dpms
@xset s noblank
@...
- 21
1
vote
0
answers
39
views
When trying to unload i2c-bcm2835 module dynamically in raspberry pi I'm always getting the "rmmod: ERROR: Module i2c_bcm2835 is in use"
I made some changes in the i2c_bcm2835.c file and now I want to dynamically load this module, i2c-bcm2835.ko which I got from below,
obj-m += i2c-bcm2835.o
all:
make -C /lib/modules/$(shell uname -...
- 11
1
vote
0
answers
109
views
Raspberry Pi 4b display cuts out but is still on
I recently got my hands on a Raspberry Pi 4b and am having trouble setting it up.
Whenever the pi boots up, it shows the rainbow screen followed by a black screen with a cursor that blinks 4 times ...
1
vote
0
answers
66
views
Can we build our own image of Raspberry Pi OS?
According to Raspberry Pi,
Many operating systems are available for Raspberry Pi, including Raspberry Pi OS, our official supported operating system, and operating systems from other organisations.
...
- 251
1
vote
0
answers
935
views
Browsers are not opening in Raspberry Pi 4
Both browsers Chromium and Firefox are not opening in Raspberry Pi. I installed the Raspbian OS from Raspberry Pi Imager and all is working fine but browsers are not opening. I checked with my old ...
1
vote
4
answers
1k
views
errors trying to import numpy on rasperry Pi 4 B
I am using the most recent version of Rasperry Pi's OS on a Pi 4 model B. Apparently the version of python that comes with the OS is 3.9. I'm not sure if Numpy comes with it or that I installed it ...
- 11
1
vote
1
answer
513
views
How can I troubleshoot server overload warnings on my Raspberry Pi 4 Minecraft server using PaperMC?
I opened the minecraft server using raspberrypi 4B model which has 4GB ram
I allocated 3GB to server and used the paperMC to open server.
Also I formatted to rasberrypi OS 64 bit version.
It works ...
- 11
1
vote
4
answers
606
views
Suitable Linux distribution for Raspberry Pi B+
What would a suitable OS (Linux distribution) be for an old Raspberry Pi B+ (2012, 512 MB RAM)?
The latest official OS comes with Chromium which doesn't work. It is also very slow.
It will be running ...
- 19
1
vote
0
answers
23
views
Changing HDMI diplay from 1 to 2 programmatically
I have a Raspberry PI 4 with a dual display setup I wanted to show different operations on both displays depending on some logic.
My application is built with compose multiplatform I can make two ...
- 11
1
vote
0
answers
146
views
PCA 9685 i2c communication issue
I would like to ask a question regarding the usage of secondary channel of i2c in rpi 4b.
I have enabled the secondary channel through adding "dtoverlay=i2c-gpio,bus=2,i2c_gpio_sda=22,...
- 11
1
vote
1
answer
2k
views
How to open port 8080
I need to check a Python server and client on the pi4B.
Only I can't find how to run or open port 8080 on the pi4B.
1
vote
0
answers
167
views
WaveShare display (7 inch) doesn't respond to touch, after playing YouTube videos in Raspberry PI 4
I have an issue with my WaveShare display (7-inch LCD with case) where when I connect it to my Raspberry PI 4 and play youtube videos for some time in the chromium browser, the screen doesn't respond ...
- 11
1
vote
0
answers
100
views
Microphone volume seems to increase via PulseAudio but arecord does not see any increase
I am still trying to understand how the audio input/output stuff works over PCM on the Pi its new to me as I've never dealt with it before. All of the testing below was on the latest Raspberry Pi OS ...
- 31
1
vote
1
answer
72
views
windows not getting IP address from Raspberry pi access point
I have looked at several posts but they don't seem to match my situation 100%
I have a Raspberry Pi 4b, 2g. I installed Bullseye 32 bit desktop (the default in Raspberry pi imager). Did all the ...
1
vote
0
answers
522
views
Raspberry Pi 4B - disabling 5GHz channel
I need help with, how to disable just 5GHz channel on raspberry pi 4B? I would like to keep 2.4GHz channel on.
- 11
1
vote
0
answers
767
views
Boot ups but display rainbow screen on Raspberry Pi 3
I'm new in RPi, so can't resolve an problem. How can I fix a Raspberry Pi with Rainbow screen? I'm using Raspberry Pi 3 B with Raspian 10 (show below)
Linux raspberrypi 5.10.103-v7+ #1529 SMP Tue Mar ...
- 11
1
vote
1
answer
714
views
RaspberryPi security, Bios settings, ubuntu secure boot. 2fa u2fa hacking
Do I have to enter operatingsystem in order to access BIOS settings on a raspberry pi? I am thinking about installing ubuntu on a raspberrypi and I see that linux has equvalent to windows 10 safemode. ...
- 11
1
vote
0
answers
1k
views
Chromium crashes after reinstallation on pi4
I noticed, today, that pages weren't loading in chromium, but If I pinged them in bash, using ping google.com, it went through just fine.
So, I reinstalled chromium, but, now a different problem has ...
1
vote
0
answers
259
views
Using Pi-Hole with USB Tether to Eth0 Bridge
New to the forums. Forgive me if my first question isn't that easy to understand. I'll try my best.
For some background:
I installed and configured pi-hole previously for an internet service that we ...
- 11
1
vote
0
answers
530
views
Raspberry pi ethernet light blinking a color when connected to laptop
I have received a Raspberry Pi 4 Model B, and have been using it for several weeks. I had installed OpenWRT(21.02.1) on one of my MicroSD cards and had put it into my pi. I don't have an external ...
- 11
1
vote
0
answers
1k
views
How can I fix dphys-swapfile?
I was trying to download some apps from pi apps, and then this output came in pi-apps: Before dpkg, apt, or Pi-Apps will work, dphys-swapfile must be fixed. I don't know, what this means exactly. Also ...
- 11
1
vote
0
answers
954
views
Display going to sleep and not turning on
I am working on a kiosk powered by RaspberryPi 4, and I have a problem when the pi is running with a DVI/VGA adapter.
The issue is that monitor is that the monitor goes to sleep during the night: I ...
- 121
1
vote
0
answers
92
views
Is there documentation for the vcgencmd pwm_speedup
I see that vcgencmd has a command pwm_speedup but I cannot find any documentation on what it does. I assume it speeds up the PWM clock, but I don't want to mess with it unless I know what its doing. ...
- 121
1
vote
0
answers
1k
views
how to install onnxruntime on raspberry pi 4
I want to setup onnxruntime python library on raspberry pi 3 and I tried some ways to install it but I couldn't . the ways that I followed are :
1 - way 1
2 - way 2
3 - using pip3
I want to know is ...
1
vote
1
answer
216
views
spi_xfer unable to send more than 256 bytes in pigpio module , any other instruction or another way to run it
0
I'm trying to communicate with ADC via SPI using "pigpio" library. Basically I'm trying to read an ADC channel data over there i have to send 0x0800 but spi_xfer is not take more than 256 ...
1
vote
0
answers
1k
views
Does Raspberry Pi 64-bit (aarch64) OS support Pi Camera module?
Does Debian Buster 64-bit (aarch64) have support for Pi Camera library?
I have recently installed a 64-bit Debian Buster OS on my Raspberry Pi 4B, I switched from a 32-bit (armv7l) OS version, because ...
1
vote
0
answers
134
views
Raspberry pi 4 with two webcams
I am trying to run two webcams on raspberry pi 4 with raspbian OS. It works rarely with very low FPS. Most of the time i am getting this error:
[ WARN:0] global /tmp/pip-wheel-qd18ncao/opencv-python/...
- 11
1
vote
0
answers
58
views
Rpi3B I2C 50k bd interferencing 4 sensors, including AS3935 lightening detector problem
I have four devices connected to a Raspberry Pi 3B via I2C - an SPS30 (dust), a BME280 (temperature, humidity, pressure), MLX90614 (sky temperature) and TLS2561 (light). They are connected to a ...
- 133
1
vote
0
answers
230
views
RPI-4 Bluetooth board does not find iOS devices
On a brand new RPI-4, I cannot find apple iphones neither using module bluetooth nor bluez package.
I tried to scan for BLE devices and all the command line tools such as bluetoothctl and hciconfig to ...
1
vote
0
answers
473
views
hdmi_cvt ignored on my boot/config.txt
I am testing a LCD HAT ( ST7735S ) that I bought and it is working great with fbcp, but I can´t get raspberry pi os to run at native screen resolution ( 128x128 ). I´ve been reading all documentation ...
- 189
1
vote
2
answers
1k
views
raspberry pi as gateway lan/wifi
I bought Raspberri Pi 4 and installed predefined OS on it (I am using it headless). Raspberry pi is not connected to internet.
Now I need to do this:
in RPI Lan port is connected computer (device), ...
- 141
1
vote
0
answers
173
views
Setting up an AP from C code rock solid
I have to develop a program for RBPi4 with latest Raspberry OS. I'm coding in C because that's what i know for now. After startup the device's first task is to create a WLAN with predefined ssid, ...
- 111
1
vote
0
answers
440
views
Can not see Pi Zero on my network
I can't seem to find anything on here already with the same case so I'll go ahead and ask.
I am trying to connect to my pi via SSH, but I can not see the pi on the network.
I have:
Flashed the SD ...
- 11
1
vote
0
answers
915
views
Raspberry Pi zero bluetoothctl connection fails to a device
I am currently trying to create a script to connect a Bluetooth printer to my raspberry device using CLI commands.
So far I have tried using bluetoothctl but it freezes/crashes whenever I try to ...
- 11
1
vote
0
answers
109
views
Problems with Huawei me909u521 modem in Raspberry Pi 3 b+
I have the Huawei me909u521 modem attached to RPi 3 b+ via sixfab LTE hat (connected by GPIO).
The Rpi is detecting the modem:
pi@raspberrypi:~$ lsusb
Bus 001 Device 004: ID 12d1:1573 Huawei ...
- 117
1
vote
1
answer
299
views
Solid State Relay only turning on once
My 12v DC motor is only turning on once then off forever. It should turn on and off in the loop indefinitely. What am I doing wrong?
I have a simple circuit...
Parts:
Raspberry Pi 4 (fully updated ...
- 151
0
votes
0
answers
10
views
Flip touchscreen horizontally
How can horizontally flip a touchscreen in Raspberry Pi OS? I already flipped the visible part of the screen using xrandr --output HDMI-1 --reflect x after having changed from Wayland to X11. And it ...
- 484
0
votes
0
answers
6
views
Latency problem with GStreamer pipeline
I have 2 CM4 boards with 2gb(tx) and 1gb(rx) rams. I use stream transmit and receive using 2 raspberry connected with UART(921600 baud). On sender side i use this pipeline
gst-launch-1.0 -vvvv -e ...
- 1
0
votes
1
answer
26
views
How to connect this CM4 to a display and reinstall os?
I have this gridxbox which is a raspberry pi CM4. To function it only required power input via type c port and lan cable connected to lan port.
https://www.gridx.ai/edge-services
Would like repurpose ...
- 101
0
votes
0
answers
23
views
Flip screen horizontally
Is there a way to flip the screen horizontally in Raspberry Pi OS?
The reason I need to do this is because I see the screen through a teleprompter mirror. Therefore I need to flip the entire screen ...
- 484
0
votes
1
answer
20
views
How can I restore parts of my system to its original state without re-installing?
I've broken something on my RPi OS. I'm not quite sure what it is, but I have edited some files in /etc/apt and /etc/NetworkManager.
I've made backups, but unfortunately restoring the last backup didn'...
- 22.6k
0
votes
0
answers
37
views
Unable to disable password login
I have Raspberry Pi OS Linux raspberrypi 6.6.31+rpt-rpi-v8 installed and I'm trying to disable password login.
I have followed a lot of recommendations from different websites, but I'm still able to ...
- 101
0
votes
0
answers
125
views
RPi Zero W not connecting to WiFi with WPA3/WPA2 compatibility mode nor with 802.11w (MFP)
I got a new home routers that supports openwrt so I got openwrt installed and programs my WLANs. My previous router didn't support 802.11ax (WiFi6) but this new one does.
So, on this new router I ...
