Raspberry Pi Stack Exchange
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1500 questions
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2 answers

What does each of the default groups on the raspberry pi do?

I need to create a more limited user for the raspberry pi. I can guess what some of these groups do (cdrom, sudo, i2c, spi) but what do some of these other groups do (adm, dialout, pi)? Here is the list on my pi running jesse lite: pi adm dialout…
BarrowWight
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17
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3 answers

CUPS is too slow, how can I make it faster?

I'm using CUPS for my Samsung CLP-315. It works very well, but it is too slow. It normally takes five minutes or more to print a single page (from pdf). When it's printing, gs is taking 100% of the CPU. Is there a way to make the gs at the printing…
otmezger
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17
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10 answers

How to use SSH out of home network

I recently set up SSH on my Raspberry Pi. It has been going swimmingly, especially since I can control the computer through my iPhone with the app Server Auditor. Sadly, this only works through the local network. How can I make my SSH work when I…
xxmbabanexx
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17
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3 answers

How do I start up in safemode?

After attempting setting up Raspberry Pi bluetooth to be bluetooth receiver for stereo, now whenever I start it up I can't SSH at all, I can't use the desktop at all or CTRL+ALT+Fnumber key to get to a terminal. I tried startx=0 in config with shift…
NoBugs
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17
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2 answers

How can I blank the screen from the command line over SSH?

This is the same question as this but for Raspberry Pi 3 / Raspbian. I need a way to show black screen by running command in console by using SSH connection. Monitor should not go to standby I just need a black screen to hide everything that is…
JPX
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17
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2 answers

Is the BCM2835 (Broadcom SoC) proprietary to the Raspberry Pi organization?

I ask because assuming someone wanted to manufacture their own (large) batch of RPi's, the major component that would be most difficult to procure is the Broadcom SoC (see here.) If obtaining this chip isn't possible or is extremely difficult, are…
RLH
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17
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2 answers

How important is a case for the Pi? (And how to safely create my own?)

How vulnerable is the Raspberry Pi without a case? I've seen the many Lego cases which look great, but I'm constantly wondering what the risk of such a case is. Will a Lego case successfully protect the Pi just like a regular case will? And what is…
Vincent
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17
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2 answers

What is /dev/vchiq in Raspberry Pi?

I am using Raspberry Pi 3 and raspbian jessie and I came across /dev/vchiq by trying to call program (omxplayer) with perg-cgi which would play some music on my RiPi. And I coudn't get it to work. When I opened it with my browser (e.g.…
Skodra
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17
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2 answers

Raspberry PI 3 MODEL B - Wireless Bridge to ethernet

I've seen a lot online for a solution to make raspberry Pi 3 into a wireless bridge. But many are old articles to suit the Pi 1 and 2. This is the last article I have seen, and tried:…
privateFunction
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17
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2 answers

Where can I find the schematics and supporting design documents for the hardware?

I've tried to search for this online, but other than a few posts on the Raspberry Pi blog, I can't find an official source of the design documentation for the hardware. It was my understanding that the entire project is Open Sourced. Is this…
RLH
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17
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4 answers

Configuring the Raspberry Pi for Node.js

Reading a book on Single Page Web Applications I came to a paragraph that got me thinking: Node.js is non-blocking and event-driven. In a nutshell, this means a single Node.js instance on modest hardware can handle tens or hundreds of thousands of…
Marius Butuc
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17
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2 answers

Can I use two raspberry pi to work together and faster?

The computing power of raspberry pi is limited and so is the access speed. I have 2 raspberry pi and was hoping I could somehow connect them together and make them work in parallel to get better and faster performance. My main usage of Ras-Pi is…
Daffy
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17
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5 answers

Forward mouse and keyboard input to X session

I'm accessing my Pi via SSH. My network is too slow to actually forward the Pi's desktop back to my laptop, so I have a monitor connected to my Pi. When I startx through Putty, I see the desktop on my Pi. All is good. However, I cannot do anything…
ACarter
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17
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6 answers

Installing Chrome on Raspbian

I am following a tutorial that is based on a Chrome extension so I have to install Chrome. When I tried the following command: sudo apt-get install chromium I get the following error: E: Package 'chromium' has no installation candidate. I…
Mona Jalal
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17
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3 answers

How to reinitialize HDMI without rebooting the RPi

I've found that my Raspberry Pi2's HDMI port only works if there's something attached to it when the RPi initially boots. If it boots with nothing attached, and I later attach a monitor, nothing shows up on the monitor. My application is headless,…
Cerin
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