Questions tagged [troubleshooting]

Referring to troubleshooting (a form of problem solving) issues with the Pi or related to the Pi.

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Raspberry Pi 3 OpenCV Compilation Error at 34%

I am trying to install OpenCV-3.1.0. I am following this tutorial: https://www.pyimagesearch.com/2015/10/26/how-to-install-opencv-3-on-raspbian-jessie/ I was on Step #4: Compile and install OpenCV ...
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32 views

Rotating the display causing low fps

I've been working on a project that uses a 1200x1920 display but in the landscape format and it's certainly been one heck of a journey. I've edited the config file hundreds of times in dozens of ...
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11 views

Retropie - n00b - how to reset or access menu?

Just received my raspberry pi 4 gaming console. It has RetroPi 4.6 installed. I've been building my favorites lists for hours. Then tonight, something went wrong. I began changing displays, themes, ...
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48 views

Raspberry 4 - NAS, slow copying over the network

Raspberry 4 - NAS, slow copying over the network I have problem with copying backup speed over network, currently only 30MB/s. How can I confirm that this is the maximum data backup speed? I tested ...
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28 views

I see two Octopi instances on my Raspberry Pi - why, and how can I stop this?

I installed Octopi on a brand new R Pi straight out of the box, connected it to my Wireless network and to my Ender3D and all went well for a few days, until I started having odd symptoms, such as ...
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1answer
43 views

rPi4 no longer capable of HDMI output. Eeprom recovery did not help

I have a rPi 4 that died on me, in two stages: First it would only show a yellow screen on HDMI outputs. Then later, it completely stopped outputting HDMI altogether. It seems to be in a reboot loop? ...
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1answer
33 views

Permanent IP Routing on rPi

I need to be able to ping my rPi through eth0, but it is connected to wifi via wlan0. Turns out, it receives the ping on eth0, and replies through wlan0. I have a rPi b+ 3, latest updates. Running ...
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207 views

My raspbian buster is stuck at Splash Screen with polkit.service!

I was working fine with my Rpi4 this morning. Next time when I started it was okay. Then there was some resolution issue. so I went into raspi-config and disabled the OpenGL. After a restart my PC is ...
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3answers
101 views

My raspberry pi HDMI is not working. What are my other options?

I got this old Raspberry Pi B+. One day, suddenly the HDMI stopped working completely. I know it boots up because I can still ssh into it. The thing is, I have no AV cables for alternate input. I ...
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1answer
63 views

RFID RC522 Clone Script Unicode Error

I've set up a RC522 Card on my pi using This Tutorial and hacked together the Read.py and Write.py scripts into a Clone.py script: #!usr/bin/env python import RPi.GPIO as GPIO from mfrc522 import ...
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1answer
248 views

Connecting a USB Device by GND, VCC, RX, and TX

I have a few basic devices that utilize a mini USB port. Rather than plugging them into a USB hub, is it possible to connect them and have them recognized by a Raspberry Pi through the four GND, VCC, ...
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95 views

Rpi AdaFruit python library controlling SPI MCP3008 of eTape Liquid Level Sensor problem

I have a rpi4 and have successfully replicated the project listed here using the eTape sensor (etape tutorial) I am satisfied with the performance using long breadboard and T-cobbler. In order to make ...
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1answer
35 views

Raspberry Pi with touchscreen - screen turns white and pi restarts when trying to use LEDs

We currently have a Raspberry Pi 3B+ with touchscreen hooked up to a PCB, and are trying to run adafruit neopixel 60led strip but, when we try and send data using their library, the screen turns white ...
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400 views

Raspberry Pi 4 drops hdmi connection for a second at boot tv reconnects, drops signal again after playing any type of video

I've been having a terrible experience with my raspberry pi 4 4G, with regards to a strange problem that's occurring. I am currently running NOOBS with raspbian/libreelec, and everytime after entering ...
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2answers
900 views

What is causing gaps in logs?

I am examining the log of my program, which runs on a Raspbian 9, on an SD card. The program is started and managed by systemd, and the logs are handled by journald. Occasionally the log contains ...
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31 views

Pi3 model B v2 no longer reads SD card!

I've had this pi for almost a year and have been using it recently for almost a month, and it used to work just fine. All of a sudden, the green LED stopped blinking "an indication I found out means ...
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1answer
78 views

Can Pi 3b+ be killed by wire under ethernet port

Can raspberry pi be killed by cable under ethernet port? I had moved pi on desk and placed it over a cable in area shown on picture (cable has only 5mm exposed wire), after that pi freezed and din´t ...
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73 views

Raspberry Pi 3 Model B Hung / Frozen, Including Clock?

I just happened to check on a Raspberry Pi 3 Model B with Raspbian Jessie 4.9.35-v7+ this morning and found it unresponsive. IIRC, there is an LED that is normally on when the Pi is on, so I thought ...
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102 views

Dropped wifi packets from Pi Zero W to Pi 3B+

We're trying to build a system where a master Pi 3B+ controls a dozen (or more) Pi Zero W clients - all running the latest raspbian (as of 18:00 EDT today) - in an isolated WiFi island (no ...
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1answer
41 views

Unable to Connect to Raspberry Pi with SSH

My Raspberry Pi is active on my network and I confirmed that it's online with an IP scanner. But if I run PuTTY (I usually connect through SSH instead of HDMI) and try to connect, it says that the ...
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40 views

Raspberry won't boot (even after replacing sd and power supply)

I was working on my raspberry over ssh, and then I lost connection with it. So then I saw that when it boots the red lights turns on while the green light doesn't light on and there is no display. ...
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37 views

Connecting Raspberry Pi Zero W to wifi [duplicate]

I've just set up a Raspberry Pi Zero W - my first Raspberry Pi. I've loaded Raspbian into it without trouble, but I can't connect it to WiFi. It can find my home network easily, and lets me key in ...
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1answer
22k views

How to update Chromium on RPi 3B+?

I'm brand new to Pi, and I found that the Raspberry Pi chromium is not as updated as standard Chromium. Thanks in advance. EDIT: For clarification, I am on Raspbian 2.5 (Nov. 2018) on a Raspberry Pi ...
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2answers
43 views

When under load, the system is unresponsive except for a ping

I've got a Raspberry Pi 1 Model B that has been my trusty workhorse for a few years. It normally chugs away happily running transmission, pi-hole and a node.js app simultaneously. All of a sudden it'...
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1answer
2k views

Help with installing zbar

I was hoping someone on here who's familiar with zbar could help me install it properly? Here's what happened: (I'm running Stretch on the Raspberry Pi 3 Model B). I download the file from here: ZBar ...
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230 views

RPi freezes at booting. Log screen attached

I'm working on a project where I have a couple of RPis recording some audio. Recently the devices stopped working and after probing I found out that devices stops at following screen while booting, ...
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2answers
239 views

Raspberry PI 3 freeze for some hours and afterwards its working

I've a strange issue with my raspberry pi 3: The raspberry is working fine, after a while the raspberry stops working for about 5 hours. Afterwards the raspberry recovers itself (without rebooting!) ...
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1answer
1k views

segmentation fault python

I was trying to install the opencv with TBB in a new virtual environment. So I have two virtual environments and a base environment. Before this compiling, the base environment was working well, with ...
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3answers
741 views

How do I change the desktop wallpaper on my Pi. I am using Jessie.

I have a number of images shown for my wallpaper in preferences but whatever I click on, does not change the wallpaper. I want to go back to the Raspberry Pi image and when I click on that image ...
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2answers
1k views

Act LED flashing 3 times quickly after boot

The ACT LED on my Raspberry Pi 3 B+ is flashing three times very quickly after boot. I am not able to connect via ssh (the error message is "Connection Refused" – despite ssh being enabled), but I am ...
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332 views

Raspberry Pi 3 crash after few hours running

I need your advice on troubleshooting my Pi 3B crashes. I set it up to run some crypto mining programming; it was running constantly fine for over few weeks. Recently, it keeps crashing after every 5-...
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1answer
146 views

SDA1 gpio test reports 0 when nothing is connected and i2cdetect -y 1 detects all addresses active?

I am fairly new to raspberry pi so if I am not providing enough information please let me know. Im working with a new Raspberry Pi 3. My issue is that the command i2cdetect -y 1 is returning all ...
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1answer
1k views

Raspberry Pi Internet Issues

On my raspberry Pi 3B, attempting to access the internet for downloads fails. Anything that uses it (chromium, apt-get, etc) does not work, giving errors such as DNS server not found, or just hanging. ...
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42 views

Detect a “crash” electrically or mechanically

Is there a mecahnical or electrical way to find out if a raspberry pi 3b has crashed? measuring voltage at a certain pin or similar?
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496 views

Mednafen Troubleshooting (specifacally SNES and Gameboy Advance)

I am trying to use mednafen and mednafee to run retro games on my raspberry pi. The NES games work great, and so do the Gameboy Color and Gameboy games, but I am having trouble with the SNES and GBA ...
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1answer
205 views

Pi3 Act blinks once, no boot

I have got a problem with my Paspberry Pi 3 that my girlfriend put away on a drawer. I cant boot it any more, I have tried the SD card in another pi, and it boots, even tried a diffrent SD card that ...
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2answers
27 views

Raspberry Pi 3 Wont show any power LEDs

I just was lucky enough to win a Raspberry Pi 3 at a school fair. I inserted an SD card with the boot image and gave it power. However, the green LED would not flash to show it was booting. I have ...
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458 views

Issues using SPI pins on Raspberry Pi 3 with MCP3008 ADC for Voltage Sensor [closed]

I am trying to create a voltage sensor using a Raspberry Pi 3 with Raspbian (February 2017 release because that is the one I need for the rest of my project) by connecting the SPI pins to an MCP3008 ...
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1answer
403 views

GPIO (using sysfs problem)

I'm presently trying to use the built-in indicator lights on the Raspberry Pi B+ to provide status: Green = OK; Red = Problem After turning off the triggers (writing none to /sys/class/leds/led[0,1]...
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1answer
2k views

Raspberry Pi 3, bluetooth is not getting connected with HM-10 bluetooth module

I currently have a Raspberry Pi 3 with built-in bluetooth and some of my work specification require to connect it with HM-10 bluetooth module but I am unable to do so. I have tried various methods ...
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2answers
114 views

Monitor goes black when unplugging the ethernet cable

My Raspberry Pi B+ is working well except: the HDMI only seems to work if the ethernet cable is plugged in. If I remove the ethernet cable the monitor goes black. I plug the cable back in - monitor ...
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1answer
576 views

Accidentally shorted C97 on the Raspberry Pi with a washer

I accidentally dropped a washer and unfortunately it landed on the C97 capacitor. I think that shorted the pi out. The ACT and PWR lights are now solid red and green, whereas it was blinking ...
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1answer
8k views

(python 3) Auto-Conversion from .h264 to .mp4 [closed]

I have a Python 3 code that is supposed to record video. Unfortunately, I do not ant it in .h264, I need it to convert to .mp4. I thought the easiest way to do this would have been to use subprocess....
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2answers
4k views

Can't connect through PuTTY

I'm going crazy trying to connect to my Pi through PuTTY. I know I have SSH enabled, I checked the ports, used ifconfig and put in every single IP address I saw in there, used hostname -I, and they ...
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1answer
545 views

Pi appears as offline according to Xfinity router even though it IS connected

I'm SSH-ing into a Pi right now, so it is definitely connected to the network. It is connected via Ethernet. The Pi is running default Raspbian. Other Wi-Fi and Ethernet devices that are connected ...
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0answers
551 views

Raspberry Pi 3 stopped working

My Raspberry Pi 3 suddenly stopped working only the red light led is on and nothing happens. I suspected the SD card so I swapped in another with only NOOBS on it and it worked once and not again. I ...
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1answer
780 views

Pi 3 Xorg.cond.d missing and need to swap the axis for the eGalax USB touchscreen

I have a problem: xinput_calibrator doesn't work properly. After I touch 4 points my touchscreen's X and Y axis stay swapped. And I can not apply changes manually in the Xorg.conf.d directory because ...
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1answer
333 views

I got my first Raspberry Pi. So how do I turn it on?

I feel stupid asking the question: I've been looking for an answer for half an hour, but it seems that anybody else have figured it out. I've got my first Raspberry Pi 3 model B. I followed the ...
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2answers
2k views

RPI 3 Firefox Video plays but Sound is loud hiss

In the latest version of Raspbian (kernel 4.4), any file I stream through youtube-dl to omxplayer or mplayer using the 3.5mm headphone jack works perfectly. However, in Firefox when I go to any site,...
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2answers
3k views

Php not working with nginx

So I tried following this guide, but seems to fail at this step. When accessing the /index.php my browser(both chromium and firefox) downloaded the page as a file, then I decided to delete the file ...