Questions tagged [ubuntu]

Ubuntu is a Linux operating system derived from the Debian distribution.

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2answers
882 views

Disable filesystem expand during boot for Ubuntu Server 16.04

I am attempting to get a sub-4gb image to retain its image size on my rpi regardless of the sdcard size. I am looking at using the ubuntu server image built by Ryan Finnie ubuntu-16.04-preinstalled-...
0
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0answers
11 views

ssh “connection timed out” after rebooting

I got an Raspberry Pi 4 4GB running Ubuntu 21.04 Desktop. I want to connect via ssh to my Raspberry Pi Zero (without Wireless) running Raspbian lite. For the ssh setup i followed the instructions ...
0
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1answer
186 views

monitor no hdmi signal

I've installed ubuntu classic server 16.04 (Rasberry Pi 3 edition) found here https://ubuntu-pi-flavour-maker.org/download/ on Rasbperry Pi 3 b and everything is working as expected when I ssh into it....
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1answer
44 views

libacsccid1_1.1.0-1~trusty1_armhf.deb or similar version for Ubuntu trusty 14.04

I have an NFC reader ACR1251U-A1, and I'm trying to install the driver for my NFC reader. In the folder that I have downloaded from the provider's website, there are only libacsccid1_1.1.0-1~trusty ...
0
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0answers
29 views

Getting Segmentation Fault Error(core dumped) after successfully installing the coco datasets while running YOLOv5 on Raspberry Pi [closed]

I am trying to run the ultralytics/yolov5 on my Raspberry Pi 4. When I run python3 test.py --data coco.yaml --weights yolov5s.pt it successfully starts with the phase and successfully downloads the ...
0
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0answers
26 views

Odd information at the end of apt-get [closed]

I keep getting this piece of information at the end, every-time I try to install a package using apt. I don't remember this happening on my PC(also using ubuntu server). System: Raspberry pi 4(4GB RAM)...
1
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3answers
2k views

Raspberry Pi Imager not writing to SD Card. Fails without errors. (Ubuntu)

I'm using KDE Neon 5.19 which isn't too different from Ubuntu 18.04. Regardless, I have an old Raspberry Pi B (the one with just two USB ports and a full sized SD slot). I grabbed an SD card from a ...
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5answers
2k views

Weird display on VGA monitor, Ubuntu Server 19.10 on Raspberry Pi 4

UPDATE: As I suspected lately, Ubuntu Server actually boots up. Nothing worked until I tried using an actual HDMI monitor instead of an HDTV or VGA monitor. I suppose the TV will work once I install a ...
1
vote
1answer
172 views

kevent 2 may have been dropped

I'm running Ubuntu Server 16 on my pi3 and I'm trying to pull docker images from he repository remotely( logged in via ssh) and keep running into the error smsc95xx 1-1.1:1.0: eth0: kevent 2 may ...
0
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2answers
75 views

How do I turn off a raspberry pi without use of desktop?

I basically softlocked my raspberry pi 4 8gb using ubuntu when I attempted to put a shell file on my taskbar. I used nano to put scrot in an .sh file for easy screenshots, and when I tried to put it ...
0
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1answer
70 views

Sound output setting on Raspbian [closed]

Hey I just got my Raspberry Pi 4B today. I am using lubuntu 20.04. I want it to output sound via HDMI. How can I do that?
3
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1answer
15k views

Setting WiFi up via the command line Ubuntu server 18.04.4 LTS - Raspberry Pi 4 Wireless connectivity

I have the Raspberry Pi 4 Model B and my choice of RAM was the 4GB. i don't have internet via the gigabit ethernet at the moment, all i have is my smartphone to share internet via a hotspot (wifi). i ...
1
vote
1answer
267 views

What is the oldest Ubuntu version available for the rPi4?

The Big Blue Button (BBB) application requires 4GB of RAM & is supported on 16.04: BBB will be supported on 18.04 in the near future. I would like to test BBB on the rpi4. Is there any instances ...
1
vote
1answer
254 views

Process readKey with high CPU load

I recently installed an "Ubuntu 16.04 LTS" on a Raspberry 3 fully upgraded to evaluate some Z-Wave devices functionality. Now I see a high readKey load (15-20%) all around the clock which is not ok ...
0
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1answer
120 views

PI 3B wifi interface fail

My PI-3B is flashed with Ubuntu 16.04 with wireless-tools and wpa_supplicant also installed. My issue is I can't get wlan0 to be recognised by the system either dynamically (DHCP) or statically. I ...
6
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4answers
15k views

White noise through audio jack

I have been using Sonic Pi recently and have been annoyed by a persistent stream of white noise. This has happened on both Raspbian and Ubuntu MATE 16.04 for Raspberry Pi, using SENNHEISER MX356s. Is ...
0
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0answers
37 views

How to run GitLab through Docker on Raspberry Pi 4b on Ubuntu Server?

While trying to start GitLab in a Docker container I am experiencing some issues. The command does works on other pc's. The command consists of: sudo docker run --detach \ --hostname 127.0.0.1 \ --...
1
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0answers
37 views

RPi wlan0 eth0 bridge, how to debug DHCP issues?

I followed this tutorial to set my RPi 4B up. In my basement, I have my RPi connected via cable and want to bridge a new WiFi AP (as in the last part of that post above). The first time, everything ...
1
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0answers
10 views

Error processing package code while installing Visual Studio Code in Ubuntu 21.04 on Raspberry Pi 4 model B

Help. Any suggestions? I'm trying to install Visual Studio Code but I keep on getting some errors in the process. Using the terminal in Ubuntu 21.04 on a Raspberry Pi 4 model B, 8GB RAM. It looks like ...
0
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2answers
91 views

Ubuntu booting from SSD (USB) with Raspi 4

I made the (wrong) decision of installing Ubuntu LTS on my Raspi 4 that I used as a server, thinking it would be easier to install and configure stuff as I'm used to Ubuntu. Turns out for some reason ...
1
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0answers
10 views

Using the Google AIY kit with Ubuntu 18 (ARM)

I installed Ubuntu 18 (ARM) on a Raspberry Pi 3B so that I could use ROS melodic to control an iRobot Create2. Everything has been going splendidly until I noticed the Google AIY Voice kit I had ...
1
vote
1answer
77 views

Firefox 89 on Pi - visual codec artifacts

Firefox 89 on my Pi 4 is displaying bad codec symptoms, videos can be watched but the picture is corrupted by brightly coloured patches around areas of detail. On the Pi I am running Ubuntu 21.04 and ...
0
votes
1answer
42 views

I broke my network on my raspberry pi

As I was experimenting with various things I deleted the file /etc/netplan/50-cloud-init.yaml. Now I can't get any network (ethernet or wifi) to connect. So I can't ssh to fix things. I am on Ubuntu ...
0
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2answers
43 views

ubuntu 18.04 server official release

Does anyone know where i can download the OFFICIAL release of Ubuntu 18.04 server for the pi4? All I can find on canonical's website is Ubuntu 20, which is incompatible with the software i need to run....
1
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3answers
2k views

RealVNC Server on UBUNTU 20.10 (ARM64) on Raspberry Pi 4

RealVNC only provides a 32bit app for Raspberry Pi OS (32bit) and not a 64bit native application, at least for now. I'm using Ubuntu 20.10 on my Raspberry and need to use RealVNC to remotely access ...
0
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1answer
14 views

What happens with .local when there are two paths to the host?

My hostname is mr2 When I am connected via ethernet I can access it with mr2.local and when over wifi, also. But what happens when I am connected both ways, or if I disconnect wifi and reconnect ...
0
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0answers
45 views

Audio alternatives for Raspberry Pi 400

So as you all know, the Raspberry Pi 400 does NOT have an audio jack, which is pretty annoying especially when I need to get audio output from it. Can I connect to a Raspberry Pi 3B via Bluetooth from ...
0
votes
2answers
45 views

GPU Memory for No gui Ubuntu

Context: I am currently running a RPi 4 8GB with Ubuntu 20.04 LTS on an M.2 240GB SSD. This system has no gui. I use it for GitLab and CICD purposes. On a x86_64, I know we can get a way with 0M for ...
1
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2answers
3k views

picamera and Ubuntu 20.04 arm64?

Does picamera work on Ubuntu 20.04 arm64? I am on pi4 4gb. Added start_x=1 to /boot/firmware/usercfg.txt and rebooted. Checked for updates. pip3 install picamera - ok. When import picamera is ...
0
votes
1answer
23 views

How to disable kernel upgrade on Ubuntu Server 21 64 Bit on Raspberry Pi 4b?

How can I disable kernel upgrades on a fresh installation of Ubuntu Server 21 64-bit OS for arm64 architectures on a Raspberry Pi 4b with 4gb? Based on this source, I tried: sudo apt-mark hold 5.11.0-...
0
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2answers
33 views

User getting removed from group after reboot

I am running Ubuntu Server 20.04.02 LTS in my RPi 4b. I ran into the problem that I couldn't access the GPIO without sudo/root with my python scripts so I changed the /dev/gpiomem group ownership to ...
0
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0answers
23 views

Remoting into Raspberry Pi 4 using VNC viewer without permission

I have a Raspberry Pi 4 running Ubuntu 20.04 and every time I try to remote in, it prompts this message: Another user is trying to view your desktop. A user on the computer "192.bla.blah.blah&...
18
votes
5answers
29k views

RPi 4 running Ubuntu Server 20.04: can't connect to WiFi

I'm trying to run my Raspberry Pi 4 on Ubuntu Server 20.04 (64bit) following this tutorial. When I reached 4. Boot Ubuntu Server, my RPi had no IP address (I switched to using a monitor when doing a ...
1
vote
1answer
578 views

symbol lookup error: undefined symbol: _ZN7QWidget8qwsEventEP8QWSEvent

I have cross-compiled executable file from QT 4.8.7. I am running it on a Raspberry PI (Ubuntu), with QT 4.8.7 and QT declarative module installed. When i run the executable file on my raspberry pi, i ...
1
vote
0answers
58 views

Raspberry Pi 4B - UBUNTU 21.04 - DSI + HDMI

SPECS: Raspberry Pi 4 Model B, Ubuntu hirsute hippo (21.04) 64 bit, 4.3 inch Capacitive Touch Display for Raspberry Pi, DSI Interface, 800×480 Initially I used HDMI to do setup with raspberry pi 4 ...
1
vote
1answer
23 views

GPIOZERO how to install lastest version on Ubuntu 20.10 servver

I am running gpiozero on my Raspberry Pi4 Ubuntu 20.10. I need to update gpiozero (1.2) to latest version (1.6.1) to use the RotaryEncoder class which is not present in the package I have installed ...
0
votes
0answers
12 views

Wireless keyboard & mouse receiver only recognized as a mouse receiver (Rpi 4 ubuntu 21.04)

I have a USB receiver that's for both a keyboard and a mouse. When I plug it in to a computer, it works perfectly. But when I plug it in to my raspberry pi 4, the wireless keyboard doesn't work while ...
0
votes
1answer
28 views

Idle Model 4B running > 115 C = damaged? [closed]

So today I noticed a 4B I was bringing up on Ubuntu 20.04 (server) was actually crashing due to heat. I managed to stop docker etc, and captured CPU measurements of ~115 C. I was purchased late last ...
1
vote
0answers
29 views

Mount USB then NFS

I'm creating a kubernetes cluster with 1 desktop pc and 3 raspberry pi4. The desktop PC is set as master node and NFS server. Each RPi4 has two USB keys: Ubuntu 21.04 Server on 32GB key Storage on ...
0
votes
1answer
182 views

How can I use the free version of Qt to create a GUI for the Raspberry Pi?

I am working on a project that requires high-medium quality GUI. I am thinking of cross compiling from Windows to Raspberry Pi or from Ubuntu to Raspberry Pi. Also, I do not know which one of those ...
3
votes
3answers
2k views

Rpi4 with Buster wpa_supplicant fails to connect to hostapd network hosted on Ubuntu laptop

I am attempting to connect a Rpi4 to an AP running on my laptop, but it won't connect. I don't see any obvious problems (to me) in wpa_supplicant or other config files. I have run wpa_supplicant in ...
0
votes
0answers
24 views

Ubuntu 20.04 Raspberry Pi 4b PXE boot fails after run /init

I have been trying to PXE boot Ubuntu 20.04 server lts for the rpi4 since about a week now, and I am basically stuck at the point where /init is executed and the boot process basically stalls. I can't ...
0
votes
1answer
524 views

Change default (as in nothing plugged in) screen resolution

I will probably be using my Raspberry Pi (running Ubuntu Mate) for remote desktop, but not all of the time. Sometimes I will want to plug it into a monitor. When it's not plugged into a monitor, I'd ...
0
votes
2answers
85 views

Fan won't turn off on shutdown

I am trying to make sure my fan turns off when I power off my raspberry pi (without having to unplug it). My fan is connected to the 3.3V pin. I didn't connect it to the 5V pin because I deemed the 3....
0
votes
1answer
165 views

Ubuntu 20.04 'Focal' cannot find all I2C devices via i2cdetect; it get a few, though

This is puzzling me: I use Ubuntu 20.04 'Focal' on a RPI CM4. When I run i2cdetect -y 1 to list the connected I2C devices on /dev/i2c-1, I get a few addresses back that correspond to the custom PCB I ...
0
votes
0answers
20 views

How to extract aarch64 vmlinuz gzip image?

I am trying to PXE boot Ubuntu 20.04 aarch64 on the pi 4b but I am stuck at the point where I need to extract the kernel image vmlinuz-5.4.0-1028-raspi. I tried to zcat and pipe it out but I ended up ...
-1
votes
1answer
31 views

Raspberrypi4B: Unable to establish a BLE connection between RPi4B and Ubuntu Laptop

I am unable to establish an ble connection between my Raspberrypi4B and Laptop. Configuration is as below: Laptop: Ubuntu-20.04.2 LTS, bluez version: 5.53 Raspberrypi4B: Ubuntu-21.04 bluez version: 5....
0
votes
1answer
2k views

Ubuntu MATE Pi not connecting to monitor?

I just flashed a MicroSD card with Ubuntu MATE. I booted up my Pi 3 Model B with it and the monitor is just showing a black screen. The monitor looks like it is connected to the Pi, because it is on ...
1
vote
1answer
1k views

Default audio output to HDMI

I have an RPi4 installed with ubuntu20.10. I connect it to a display(TV) using an HDMI cable. The problem is the output is by default set to a 3.5mm jack. I override that by running the raspi-config ...
0
votes
0answers
30 views

Raspberry pi 4 gives vertical color lines on bootup

I am using a Raspberry pi 4 model B 4GB with ubuntu 20.04 installed on a 32GB memory card and when I booted, I got a display with vertical color lines. I tried using multiples displays and all results ...

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