Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

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1500 questions
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How can I use the Debian GL screensavers or any others that support hardware acceleration?

The sole purpose for my RPi is to use the DVI out functionality and I am going to rip apart a 19" LCD HD screen and build it into my own frame. I already did this with a very old notebook a few year ago, and being a huMAN, I want bigger and better…
Piotr Kula
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No HDMI video after boot sequence

Raspberry Pi 4B connected via micro-HDMI to HDMI cable to a 1920x1080 computer monitor. The boot sequence starts with text being printed to the screen (splash screen off) and when it should switch to graphics mode, it goes blank. The monitor says…
kaldimar
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is dtoverlay a general linux concept or RPi specific?

With all the raspberry pi hats popping on and off, dtoverlay and /boot/config.txt is a very nice method to quickly tell the kernel that you've got new device tree information. But I've never seen this implemented on any other linux platforms,…
Sittin Hawk
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Creating halt/wake button?

I have rigged up a wake-from-halt button using pins 5 and 6. These two pins, when connected, will reset power and reboot from halt. I want to use this same button, if I can, to run a command that, when pressed, will shut down the computer using sudo…
Ryan McClure
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Connecting to a Raspberry Pi TightVNC server isn't working with Screenshare on Mac OS X?

I have a tightvnc server set up on my raspberry pi on port 1 but when I try to connect to it from my mac using the built in screen sharing client i get an error: Connection Failed to:192.168.1.127:1 Please make sure that Screen Sharing (in the…
user12174
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How do I stream movies to openELEC via LAN?

I want to streammovies from my PC to the Raspberry Pi where openELEC is installed on. It works just fine. It's installed correctly. But how do I stream movies from a pc to the device? So I won't have to use any external data-storage for the…
Yababaa
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4 answers

How to set up ssmtp and send emails?

Im new to raspberry pi. I installed the raspian OS on it. I want to send emails from it using my gmail account. I want to send from the command line interface and from php scripts. I followed this…
omega
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4 answers

Is it possible to stream H.264 with RTSP on Raspberry Pi?

I'm trying to set up a video conferencing system by using two Raspberry Pi boards. How can I stream the H.264 protocol over a real-time streaming protocol via an Ethernet connection? Which OS should I use to develop on the Raspberry Pi board?
sujal
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Battery Power Requirements

Is this Maplin Power Bank 4000mAh pwerful enough to power the Pi with all of the peripherals below? This is useful as I cannot order online, and it is currently £15. I have a Raspberry Pi Model B, which I plan to use build a small two-motor robot.…
Wilf
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How to wire a stepper motor?

I recently bought one of these stepper motor and driver boards - and I cannot find any documentation how to connect it to the Raspberry Pi - I'm attempting to use the AdaFruit tutorial and while I've gotten all of the connections made to the…
Steve French
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1 answer

How to remotely reboot halted Pi

I'm thinking of building an array of Pis but I'd like an intelligent method of powering them, i.e., I would like power to each to be controllable via USB. I like the USB GPIO Module suggestion given here, however, I would like to know if the reset…
hfaran
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Can I run hardfp software on a softfp kernel?

How to build a GCC 4.7 toolchain for cross-compiling? explains how to build a cross-compiling GCC and advises choosing softfp, but I understand that hardfp would be much faster. Will software compiled for hardfp work on a softfp kernel or is the ABI…
Alex Chamberlain
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6 answers

Why does my Raspberry Pi keep on rebooting?

I have a Raspberry Pi running Debian. The boot.rc file in the boot partition is replaced with the boot_enable_ssh.rc so that I can access it with ssh. After that did not work, I connected it to a screen and watched the output. The boot process seems…
Till B
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ERROR: Environment '/home/pi/.virtualenvs/cv' does not contain an activate script

I am trying to install opencv 4 on my raspberry pi 4 using these instructions from this website but I have come across an error when I run the command mkvirtualenv cv -p python3. The error is found below. Please do help me guys as I have searched…
user3880651
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Sudo permissions disaster

I just got a Pi-4. I'm not sure if I did something wrong while setting it up, but after getting it running I noticed that sudo commands required no passwords. I tried to change this, following some advice I found here: How to change user pi sudo…
Absurdistan
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