Skip to main content
OverflowAI is here! AI power for your Stack Overflow for Teams knowledge community. Learn more
11 votes
Accepted

What is causing gaps in logs?

The time gap can be explained because the Raspberry Pi does not have a realtime clock built-in. Raspbian takes effort to make the gap as small as possible and don't always start with 1970-01-01. It ...
Ingo's user avatar
  • 42.2k
10 votes
Accepted

Slow Boot: Ethernet Wait

Create file (with subdirs) /etc/systemd/system/networking.service.d/reduce-timeout.conf with content: [Service] TimeoutStartSec=1 On my Pi model B (with Minibian) this solution resolved the ...
Evgeniy Chukanov's user avatar
5 votes

Raspberry Pi 3 - internal Wifi wont connect to network

I solved the problem. First I updated my settings as suggested in the link that Miliways provided in a comment in my original answer. That alone didn't solve it, what I actually had to do is change ...
Virus Ex's user avatar
  • 141
5 votes

Slow Boot: Ethernet Wait

Run sudo raspi-config and disable 4th option: Wait for Network at Boot.
Huczu's user avatar
  • 1,251
4 votes
Accepted

Consistent Corruption of SD Card

I tested it with the badblocks command on another Linux box and it said there were 0 errors. This is actually a useless tool with SD cards, because SD cards use virtual addressing and there is no ...
goldilocks's user avatar
  • 59.1k
4 votes
Accepted

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

You're blowing the power budget. You need an external power supply for your LED strip. You're lucky you haven't trashed your SDCard by losing the power supply when the system is busy.
Dougie's user avatar
  • 5,321
3 votes

Accidentally shorted C97 on the Raspberry Pi with a washer

I had a slightly different problem, but it's related. While tightening a nut next to C97 it popped off. Without C97 the USB ports failed. I replaced the CMT with a 100nf radial capacitor and I'm back ...
Keith Cambron - KC1ATT's user avatar
3 votes
Accepted

Cannot find device "wlan0"

You don't have firmware for this device. Just download this: sudo wget https://github.com/porjo/mt7601/raw/master/src/mcu/bin/MT7601.bin -O /lib/firmware/mt7601u.bin and reboot your machine. Now you ...
Huczu's user avatar
  • 1,251
3 votes
Accepted

Is there diagnostic software to perform a general health check of RPi components?

Not really since it's pretty hard to break a Pi (via software). What I can think of right now: For memory: memtester, can be installed using sudo apt-get install memtester. Usage: sudo memtester &...
Aloha's user avatar
  • 7,156
3 votes

RPI 3 Firefox Video plays but Sound is loud hiss

I found the solution: sudo apt-get install alsa-utils sudo apt-get install mpg321 sudo apt-get install lame sudo modprobe snd-bcm2835 Enabling Audio Output By default, the RPi audio output is set ...
Inés Gómez Benavent's user avatar
3 votes
Accepted

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

No. The USB protocol is different to the simple serial protocol used by a UART.
joan's user avatar
  • 71.1k
2 votes
Accepted

How to get rid of this video flickering?

Turns out that my TV-monitor displays interlaced footage really badly, even though it communicated to the Pi that it is able to support it. Whether or not the video output by the Pi is interlaced or ...
Nearoo's user avatar
  • 151
2 votes

Slow Boot: Ethernet Wait

I had no success applying the many other good solutions to my setup which involves having a macvlan interface on top of eth0. Install based on 2018-06-27-raspbian-stretch-lite. What works well for me: ...
AnyDev's user avatar
  • 123
2 votes

Slow Boot: Ethernet Wait

I don't have the reputation to comment on the accepted answer yet. But just a quick update on the answer, for the latest Raspbian Linux raspberrypi 4.9.59-v7+ #1047 SMP Sun Oct 29 12:19:23 GMT 2017 ...
regisin's user avatar
  • 73
2 votes
Accepted

Official Touchscreen Backlight Inconsistent Control

Although I haven't found the reason for this problem, a work around which works well is setting the brightness file to 0 like so: echo 0 > "/sys/class/backlight/rpi_backlight/brightness" And to ...
NULL's user avatar
  • 2,230
2 votes
Accepted

Have I destroyed USB power? Ethernet & USB devices powering on & off constantly unless keyboard connected

This was a power supply problem. If you get something like this, check that enough power is being supplied to the Pi e.g. with a multimeter; or if you haven't got one, try a different supply and cable....
Kian's user avatar
  • 129
2 votes

Consistent Corruption of SD Card

You are using an inadequate power supply. All of your filesystem problems will be down to this. The power supply warning square shouldn't be on your screen. Get something like the official and ...
scruss's user avatar
  • 9,078
2 votes

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

So here is the solution for Raspbian Stretch pcmanfm --set-wallpaper yourfile.jpg The file can be on any path that is available to read by the user. Here I have assumed it to be /home/pi.
Chiwda's user avatar
  • 171
2 votes

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

This answer is based on Buster, so Jessie may be a bit different. Pcmanfm sets its wallpaper based on what the config file tells it to. The config file is located at /home/pi/.config/pcmanfm/LXDE-pi/...
Botspot's user avatar
  • 1,779
2 votes

How to update Chromium on RPi 3B+?

Another user asked the same question 7 hours later. I seems nobody notices your question. You can find an accepted answer to the other question at Is it possible to upgrade Chromium past v65?. Also ...
Ingo's user avatar
  • 42.2k
2 votes
Accepted

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

The question has a solution. in the comments it is noted, that the HDMI cable was broken. Replacing it with a new one solved the problem.
Ingo's user avatar
  • 42.2k
1 vote

Slow Boot: Ethernet Wait

Does anyone know how I can fix this, to satisfy both conditions? Perhaps, but not in a canonical way ("proper practice") way without examining the system (I've never used minibian), and learning more ...
goldilocks's user avatar
  • 59.1k
1 vote

Act LED flashing 3 times quickly after boot

Looks like my RootFS actually got corrupt. A lot of files in /bin and /etc were missing (e.g. passwd files + its backups and shadows), which rendered the whole system useless. The only thing I could ...
Unkn0wn's user avatar
  • 23
1 vote

Act LED flashing 3 times quickly after boot

So, if nothing has changed, but something has changed it must be magic – or DHCP (which some would argue is the same thing). But seriously, from what you've described it sounds like the Pi's IP ...
dlu's user avatar
  • 459
1 vote

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

The symptoms indicate that something is pulling SDA to ground. You had nothing connected so it is not an external device. Check around pin 3 for any debris. If you can't find any it sounds like the ...
joan's user avatar
  • 71.1k
1 vote
Accepted

Raspberry Pi 3 Wont show any power LEDs

Try re-downloading the image because it may be corrupt, another issue may be that your SD card has come to the end of its life and you will need a new one.
Conor Matthews's user avatar
1 vote

GPIO (using sysfs problem)

You are wasting your time trying to control the on-board LEDs. They are controlled by kernel services, and additionally for the Red LED a hardware power monitor. You CAN change their state, but the ...
Milliways's user avatar
  • 60.3k
1 vote

Monitor goes black when unplugging the ethernet cable

Sounds like a ground loop side effect. I think that the Ethernet port on the 3B+ is not the isolated kind but just has common mode noise magnetics. So ground is DC connected through it and probably is ...
Larry Klein's user avatar
1 vote
Accepted

Monitor goes black when unplugging the ethernet cable

The solution: using another HDMI cable (shorter and thicker). The monitor now stays on no matter what, ethernet has no effect anymore. Weird.
Heinrich Ulbricht's user avatar

Only top scored, non community-wiki answers of a minimum length are eligible