Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

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1500 questions
11
votes
2 answers

Auto-execute desktop shortcut problem

I have created file /home/pi/Desktop/DecoderPro.desktop with the contents [Desktop Entry] Type=Application Encoding=UTF-8 Name=DecoderPro Comment=JMRI…
Pygmalion
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10
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1 answer

Pi 4 I/O interface options... and where to find them

The BCM2711's hardware documentation lists multiple I/O interface options. Among others these are: up to 6 × I2C, up to 6 × UART (muxed with I2C), up to 6 × SPI (only five exposed on Raspberry Pi 4B) The Pi 4 however shares the pinout of its…
Ghanima
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10
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4 answers

raspi-config network option not working

I am trying to turn on the network option in raspi-config, but when I do, I get this error: could not communicate with wpa_supplicant Then I hit enter to continue and I get this message There was an error running option N2 Wi-Fi I am running the…
Mooshroom14
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10
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4 answers

Shorted 3.3v + 5v together. Is it possible to repair?

I was reading through some instructions on how to add a power off/on button to the Pi and accidentally misread instructions and shorted the two end pins on a 3+B model, which appear to be 3.3v and 5v. It doesn't appear to boot now and I just see a…
Elijah Lynn
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10
votes
3 answers

Get reading of RPI supply voltage

On the most recent pi I've been playing with I've noticed the under-voltage lightning bolt warning, discussed on this question. My question is whether there's a way I can access the voltage reading used to trigger this warning, so that I can see how…
kabdulla
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10
votes
2 answers

Overclocking via command line

I'm setting up a Puppet instance that will manage a bunch of RPis. This means I cannot overclock them one by one using raspi-config. Overclocking should be as simple as creating /boot/config.txt: root@rpi-032113 ~ # file /boot/config.txt…
Tuinslak
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10
votes
3 answers

How do I auto-hide the taskbar?

Is it possible to configure the taskbar to auto-hide after a certain period of time in Raspbian “wheezy” soft-float? I was able to do something similar for the cursor by downloading a application called "unclutter". Is there any way to do this for…
TopCaller
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10
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3 answers

raspberry pi as access point with captive portal

I recently got a raspberry pi. I have it set up as an access point in a standalone network (not connected to the internet). I can also serve a static website on this network. I've been trying to set up a captive portal so that when a user joins the…
global
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10
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3 answers

Homebrew Power Supply for Raspberry Pi

I was wondering what precautions I should be taking when I am making a PSU. I managed to find an old dc adapter. These are the parts I currently have. | no | name | specs | |----+----------------+--------------------| | 1 |…
feverDream
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10
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3 answers

What is the MTBF of the Raspberry Pi Model B?

What is the mean time before failure (MTBF) for a Raspberry Pi Model B? I can't seem to find this information anywhere. I have an idea for a kind of art project that would require one to run as long as possible, and I want to have some idea of how…
Kaypro II
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10
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4 answers

Raspbian 8 on Raspberry Pi 3 B+

How can I can use my old Raspbian 8 (Jessie) SD card installation on the Pi 3 B+? I changed files in /boot. (start.elf, start_cd.elf, start_db.elf, start_x.elf, bcm2708-rpi-0-w.dtb, bcm2708-rpi-b.dtb, bcm2708-rpi-plus.dtb, bcm2708-rpi-cm.dtb,…
medismail
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10
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3 answers

How do I restart sshd on raspbian?

How do I restart sshd on raspbian stretch? This does not work: pi@raspberrypi:~/.ssh $ sudo systemctl restart sshd Failed to restart sshd.service: Unit sshd.service not found.
Jarle Hammen Knudsen
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10
votes
4 answers

Powering the raspberry Pi from USB + microUSB, is it safe?

I want to power a Pi model B from a powered USB hub. I got surprised that the Pi powers on with only the USB attached. A little search in the forums confirmed me that it is a working solution. I measured the voltage between TP1 and TP2 and it says…
Alessandro Da Rugna
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10
votes
1 answer

How do I install distcc?

I have read How to build a GCC 4.7 toolchain for cross-compiling? and have successfully built a simple test program that works on my RPi. To do this, I had to run arm-unknown-linux-gnueabi-gcc hello.c -o hello on my x86 desktop and scp the…
Alex Chamberlain
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10
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4 answers

What is the earliest place in the boot process where I can put my script?

For my application, I need to cut off the USB power at the earliest possible stage. Right now it starts early in init.d but I would like it, if possible, to start before the init.d stuff starts. I read somewhere that Linux normally calls /sbin/init…
Radu
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