Questions tagged [pi-4]

For questions that apply specifically to the Raspberry Pi 4 and not other/all models.

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votes
1answer
702 views

Wifi repeater with bridge: connected but no internet on mobile phone but works fine on MacBook

I live in a dorm where I don't have the physical access to the router. I want to set up a Pi as a Wi-Fi router with a bridge so that I could connect Philips Hue Bridge via Ethernet and then control ...
1
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2answers
2k views

Play 2 videos on 2 hdmi displays with rpi 4

New raspberry has 2 hdmi connectors. Is it possible to play 2 different videos at the same time (one per screen) with a single raspberry ? Thanks
1
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0answers
655 views

power supply for multiple raspberry pi4

I am wondering if any one knows of a power supply that will power 4 or more raspberry pi4 with the type C plug? (Yes I would like the full 3 amps or more) I thought of a standard ATX power supply, ...
1
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1answer
3k views

Raspberry Pi 4 Installed screen drivers but disabled my hdmi

I bought a touchscreen and installed the drivers for it, but now my hdmi doesn't work. I am currently running Raspbian on Raspberry Pi 4 model B.And I have a 3.5 inch tft screen.I do not no what ...
9
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4answers
18k views

SATA 3 SSD too slow on raspberry pi 4, even with external power

I have a Pi 4B (with latest firmware upgrade) running Raspbian Buster and a 2TB SSD with a SATA 3 interface. I'm using a SATA 3 to USB 3 converter that can also connect to external power when ...
2
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0answers
153 views

Issue with Raspberry Pi 4 OpenCV

I have been using OpenVINO + NCS2 on a raspberry Pi 3b+ with no issues for an IP camera security application (object detection). I then upgraded to Pi 4 looking for better performances. The object ...
2
votes
2answers
7k views

Can I run Raspbian Stretch on Pi 4?

According to the article, there is a yellow checkmark for Pi 4 for Stretch (if it is upgraded to the 2019-04-08 release). I'm curious what limitations the Pi 4 has in this state.
2
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0answers
335 views

Purethermal2 + RPi4 (4GB + Raspbian)

A week ago I received a fresh RPi4 4GB and started to play with it. I installed Raspbian Buster from the downloads page, no errors. After everything was set up, I tried to connect my Purethermal 2 (...
1
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0answers
812 views

Videocalls/conferencing with the Pi4B 4gb model?

so I'm currently looking for a way to do two way video calls between the pi and an android device but most of the solutions I can find for this are from tutorials or software that is either not ...
5
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3answers
6k views

Raspberry Pi 4 - screen rotation [duplicate]

I just got my new Raspberry Pi 4 and I'm trying to rotate the screen. Usually on previous Raspberry versions I did that simply by putting display_rotate=1 to config.txt, but when doing this on ...
0
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1answer
222 views

Raspberry Pi 4 - screen rotation [duplicate]

I just got my new Raspberry Pi 4 and I'm trying to rotate the screen. Usually on previous Raspberry versions I did that simply by putting display_rotate=1 to config.txt, but when doing this on ...
1
vote
1answer
1k views

npm not working

I have a pi4 and am very new to it so I have installed npm and nodejs but it wont run any packeges, I get an "throw err; cannot find module ´internal/util/types´. I run ´npm -v´ and get the same ...
2
votes
1answer
6k views

Raspberry Pi4B Not Booting - Solid Green

Just got a Raspberry Pi4B, I have tried all night to get this to work and have had no luck. Both the red and green LED indicators are both on, not blinking. I have followed all troubleshooting advice ...
11
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2answers
20k views

Why raspberry pi 4b claims that it's processor is armv7l when in official specification it's ARM v8? How to change it?

I need to run MongoDB docker container on Raspberry Pi 4B. My Raspberry has preset (already installed) Raspbian on SD card, I didn't install OS by myself. MongoDB docker image supports arm64v8. But ...
0
votes
1answer
249 views

Is it possible to programmatically change GPIO pins voltage?

I recently bought RPi 4 equipped with fan which I connected to GPIO pins 4 and 6. It's not so quiet so I want to write simple app which will be checking temperature each 5 or 10 seconds and adjust ...
2
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0answers
2k views

How can I get my new Raspberry Pi 4B to output 1080i video

I finally got into the Pi world with a model 4B. I've updated it to Raspian/Buster and have the network working (wireless and wired - but just using wireless right now). I'm running it using VNC-...
2
votes
2answers
866 views

Backward Compatibility on the Pi 4

Is it possible to run Raspbian Stretch on the Pi 4? The problem is that the newest released (Raspbian Buster) has some weird bug in which JavaFX applications cannot be started with the error : "*...
1
vote
1answer
2k views

Connecting to the Raspberry from TightVNC

The Pi sets up RealVNC. Is it possible to use a TightVNC client to connect to it? I have enabled the VNC server on Raspbian GNU/Linux 10 (buster) without any special configuration. From the Pi to ...
1
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0answers
2k views

Raspberry Pi 4B no video

I just bought two raspberry 4s (1Gb and 2Gb of RAM) and am unable to get the slightest video signal out of them. I tried every combination of the following components: Raspbian buster lite/desktop 5V ...
3
votes
1answer
2k views

Unable to Create 2.4 Ghz wifi Access Point on the Raspberry Pi 4

I am trying to create a wifi repeating Access Point on the Pi 4. I used this guide to setup the AP using hostapd. It says here that the hostapd.conf option hw_mode=g should ensure using the 2.4 ...
1
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0answers
354 views

Installing Raspbian on mdadm raid

I'm looking to make a serious Raspberry Pi installation, and a micro sd card is not enough performance or redundancy for me. So I'm trying to figure out how to install Raspbian on a mdadm raid5 array ...
2
votes
2answers
1k views

RPi 4B ACT solid green

I am new to raspberry pi and I recently decided to get RPi 4B. Anyways, I was doing a small project and when I finished, I pulled the jumper wires from the breadboard and the wire connected the GND ...
1
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2answers
3k views

Can you use a raspberry pi for a 5-6 player Minecraft server?

I am trying to use a new Raspberry Pi 4 (with 4 GBs RAM) as a Minecraft server for 5-6 players. Would it perform well or is it just more worth my time to build a server.
0
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1answer
3k views

Very poor OpenVPN performance on Raspberry Pi 4B

Recently I configured OpenVPN via PiVPN on my Raspberry Pi Model 4B with newest Raspbian Buster (4.19.58-v7l+) to have an access to my home network from anywhere. Since beginning I have a very poor ...
2
votes
1answer
6k views

Can I supply power with 5V 2Amp to Raspberry pi 4 [duplicate]

Can I supply power with 5V 2Amp to Raspberry pi 4? Currently 5V 3Amp chargers by Raspberry Pi are out of stock , so I am using phone charger with 5V 2Amp along with Type C adapter.
6
votes
2answers
7k views

Pi 4 X-Display resolution doesn't match frame buffer

I just picked up a Pi 4 and imaged a new card with Raspbian Buster. I'm running this headless (using VNC) but noticed the resolution doesn't match what I've set via raspi-config (which updates /boot/...
0
votes
3answers
463 views

Raspberry pi 4 gets hot while installing raspbian

I just got Raspberry pi 4 and it too hot while installing raspbian OS. > vcgencmd measure_temp temp=78.0'C Is this normal ? I installed NOOBS Lite from Windows 10 and installed in SD card. It's ...
2
votes
1answer
328 views

Is Raspberry PI 4 capable of playing two HD videos simultaneously?

RPi 4 can drive two displays with the two HDMI ports. Will it be able to simultaneously decode and play two different HD Quality videos - one on each display?
0
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0answers
2k views

raspberry pi 4 New uart configuration

New raspberry pi 4 has uart on gpio 12 and 13 under ALT4. how could a character device /dev/ttyS5 be created out of it? Thanks
46
votes
13answers
123k views

64-bit OS on Raspberry Pi 4

Looking for a 64-bit version of Linux for the Raspberry Pi 4. I'm aware that support under Ubuntu Mate is in the works, apparently Ubuntu Server works but it limited to using 1 GB of RAM. Are there ...
1
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0answers
33 views

Raspberry PI 4 can the power be software controlled to the camera?

With the new Raspberry Pi 4. Can the power to the Raspberry Pi 4's camera on the CSI connection be controlled by software?
0
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1answer
5k views

Pi4 Screen Res and Overscan

With my new Pi 4, I am having a ton of difficulty getting the display output correct. I have eventually managed to get the resolution correct with a combination of the boot config and the screen ...
1
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0answers
355 views

Lakka Retroarch ignores hdmi mode, and cannot correct it via SSH effectively

Disclaimer, I am using HDMI => VGA to a 480p CRT, raspberry pi 4b When I change the config.txt to: #480p hdmi_group=2 hdmi_mode=4 the boot screen looks fine (with the lakka logo) Then when ...
0
votes
1answer
929 views

NOOBS hangs on rainbow screen, does not boot

I've installed NOOBS using the standard instructions included in the zip file, but every time I insert the SD card, boot hangs on the rainbow screen. What's funny is that if I flash the card with ...
1
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2answers
247 views

Can't OpenGL render points and lines on RPi4 (specifically)

How to get OpenGL.glDrawElements(GL_POINTS, ..) (or GL_LINE_LOOP, GL_LINE_STRIP, GL_LINES) to work with the latest Raspberry Pi? I maintain the pi3d module and, though it works on windows, linux and ...
0
votes
1answer
261 views

I want to use a 3rd party USB-WIFI dongle

My Raspi 4 has a custom metal case, which means the on-board Wifi chip has a hard time getting a reliable signal to my router downstairs. Therefore I want to use an external USB-Wifi adapter and then ...
1
vote
2answers
470 views

Resizing partition on an external disk renders it unusable as a root partition?

I'm attempting to configure my raspberry pi 4 to boot from an external disk, and it works pretty well! I've configured it to boot from the partition ID I get from sudo blkid corresponding to my boot ...
3
votes
3answers
3k views

Can I power raspberry Pi 4 with variable power supply?

I'm trying to power my new Raspberry Pi 4 via an external power supply, that only has positive and negative leads coming out of it. So I can set that to 5 volts, but then I need to connect it to the ...
5
votes
8answers
7k views

RPI4 won't boot with powered USB hub

I have an RPI4 running a Plex server, Pihole, etc etc. Power kept dropping while running certain tasks involving the attached HDD, so I started using a powered USB3 hub - problem solved. But now the ...
5
votes
2answers
3k views

How to make a splitter cable for the USB2 OTG port on the RPi 4B?

According to the answer to Where is the USB2 OTG port on the RPi 4 Model B located? the Raspberry Pi 4B has a "hidden" OTG port in the USB-C power connector. I found at Very simple OTG on pi4 and at 4 ...
2
votes
1answer
754 views

How to verify id of installed firmware?

The release notes for example to date 2019-07-10 shows * Linux kernel 4.19.57 * Raspberry Pi firmware cb3a32adf39f45a49be454e30c7464920ad7c605 After an update I can verify the current kernel version ...
6
votes
3answers
7k views

Booting Alpine linux on Raspberry Pi 4

has anyone had success running Alpine Linux on the Raspberry Pi 4? I have copied the contents of the Alpine release for rpi 64bit from here to an SD Card formatted with FAT32, but I only get to the ...
6
votes
3answers
14k views

ufw and iptables on buster

I've got a RPi4 and I'm trying to configure ufw. The problem is that I get this error ERROR: Couldn't determine iptables version The versions of iptables and ufw are iptables 1.8.2-4 ...
11
votes
5answers
15k views

Where is the USB2 OTG port on the RPi 4 Model B located?

According to this answer the Raspberry Pi 4 Model B has a total of five USB ports (two USB3 host, two USB2 host, one USB2 OTG). Where is the fifth USB2 OTG port located and how can I use it? Can I ...
2
votes
2answers
3k views

Raspberry Pi does not reboot with powered external HDD attached

I have recently set up a Plex Media Server on a new Raspberry Pi 4 (4 Gb). This is powered using it's own official power supply, the Pi is connected via USB to a powered USB hub which has a 1TB WD ...
27
votes
3answers
69k views

How to disable wifi in Raspberry Pi 4

How to disable WiFi in Raspberry Pi4, possibly keeping the chip powered off.
2
votes
0answers
1k views

Different resolutions HDMI-1/HDMI-2 in Screen Layout Editor

I have a Raspberry Pi 4 (2GB) connected to 2 displays of resolution 3840x600 each (58:9 aspect ratio), running the latest version of Buster. To have the display in correct resolution, I have edited ...
0
votes
0answers
2k views

Single webcam using /dev/video0 and /dev/video1

With just one webcam attached, I get two devices: /dev/video0 and /dev/video1 They appear to have identical attributes. It's random which one gets bound to which entry, and only 1 of them actually ...
5
votes
1answer
2k views

What is the purpose of PD_SENSE in the Raspberry Pi 4 power circuit?

Here the schematics of the USB-C power input of the Pi 4 : You can see that there is a resistor connected to the USB_CC lines of the USC-C socket, the other side is labelled PD_SENSE and is going ...
0
votes
1answer
131 views

Can you use the Raspberry Pi 4 B to control 1 or more Raspberry Pi Zero's?

My project is going to use Pi 4 to connect to 1 or 2 Pi Zeros. I would want the Pi 4 to control the Pi Zeros. Would that work? Also I am going to connect the Pi 4 to the Ethernet. Also would the Pi 4 ...