Raspberry Pi Stack Exchange
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1500 questions
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2 answers

How to install Ruby >= 2.1.9?

I tried sudo apt-get install ruby but it will install Ruby 2.1.5. How could I install version >= 2.1.9 ?
Van Tr
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Running Debian (Debian, not Raspbian) on a Raspberry Pi 3

The original Raspberry Pis had an ARM11 core which used the ARMv6 architecture, and most distribution's ARM hardfloat ports require at least ARMv7-A, the reason for Raspberry Pi-specific distributions (please correct me if I'm wrong about any of…
Billy
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H265 decoding performance on a Pi 3

Though there seems to be little information available, I've seen several posts of people successfully decoding H265 video on the Pi 3 either with, or without overclocking. I'm running a Raspberry Pi 3, which is used primarily as a Plex media server.…
Boaz Arad
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Why does the Sense Hat / Astro Pi show the wrong temperature and humidity?

I recently bought the sense-hat, previously called astro-pi. Unfortunately the temperature shows 28 to 31 degrees Celsius from both temperature sensors on the board. They often show around 30 degrees right from the start when the raspberry pi boots,…
ElectroDxvid
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Micro SD card slot on Pi 2

I've just received a Raspberry Pi 2 and tried to insert the micro SD card, but for some reason the mechanism doesn't appear to be working correctly. You hear a click and can observe the card pushing fully into the slot. However, the card simply…
Russ
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Raspberry Pi 3 - internal Wifi wont connect to network

i'm rather new to Linux and all that, in fact the Raspberry Pi 3 i just got is the first Linux-only machine i ever had, running the latest version of Raspbian .. so here's my problem: I'm trying to use the integrated wifi adapter to establish a…
Virus Ex
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Does the BCM43438 WiFi chip in Raspberry Pi 3 support power management setting?

I'm trying to disable the wireless power save on my RPI3, but can't do it: $ sudo iwconfig wlan0 power off Error for wireless request "Set Power Management" (8B2C): SET failed on device wlan0 ; Invalid argument. Is it possible, or simply not…
Marcus
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6 answers

How to run a command with alias?

I'm very new to Linux environment and I just got myself a Pi to play with it. Recently I found this command to check my Pi's temperature which is /opt/vc/bin/vcgencmd measure_temp Is it possible to save that command somewhere with a shortcut or an…
Ye Myat Aung
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I want to switch between versions 2 & 3 of Python. Both are installed

If I double click on a .py file it opens "IDLE" (is there another way to open "IDLE"?), but the default python version is 2 when I select "run". I want to PERMANENTLY change the default version to 3 so that I don't have to switch versions every time…
John Foggitt
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4 answers

RPi OCR or how to read a number from the camera

Tried googling first but could not find any interesting hits relevant to what i am looking for. The wild idea is to put a camera in front of an energy meter or watt meter display and read the accumulated total in the display, and process it down to…
chgus
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2 answers

Default username/password for CentOS 7 on Raspberry Pi

What is the default username and password for CentOS 7 for Raspberry Pi?
Enayet Hussain
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9
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1 answer

Raspberry PI Zero no HDMI output

I've bought a month ago a new Raspberry Zero to try this little toy. I'm already playing with a Raspberry and linux OS in general but this time i'm very close to give up. The problem is that this Raspy won't display boot messages, this is what i've…
Niccolo Lubello
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11 answers

No video on HDMI?

I just got my Raspberry Pi in the mail, and went to hook it up to my TV with an HDMI cable. I plugged in the cable (known to work with my cable box), a keyboard, and then power. A light comes on the Raspberry Pi, but no picture. Is there something…
Canadian Luke
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How can I run Stella (Atari emulator) on the Raspberry Pi?

I am trying to run Stella, the Atari emulator that is in the Debian repository. If I run it from X, it's very slow and I am not able to use OpenGL acceleration. Plus, the full screen doesn't fit the screen of my TV properly (I am using the composite…
Alessandro Cosentino
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3 answers

Do You HAVE To Use SDFormatter Before Installing NOOBS?

SDFormatter is often recommended to format the SDCard. https://raspberrypi.stackexchange.com/a/19928/39410 http://elinux.org/RPi_Easy_SD_Card_Setup#Using_NOOBS I have never heard of this software before using the Raspberry Pi. Is it critical to…
opticyclic
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