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1500 questions
82
votes
12 answers
How to set up Raspberry Pi without a monitor?
I recently bought a Raspberry Pi, type B model. I want to set it up directly to my laptop screen, without any other monitor. I have not set it up yet. How do I connect my laptop's screen as the Raspberry Pi's display?
I do not want to buy an HDMI…
Damodar Dahal
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81
votes
7 answers
How do I enable Wake On LAN?
My first thought was to simply start broadcasting WOL magic packets over the network, but my Raspberry Pi is not waking up. So I'm assuming it either doesn't support WOL, or I haven't properly configured it.
What do I have to do to enable…
Oliver Salzburg
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80
votes
8 answers
Solving “RTNETLINK answers: File exists” when running ifup
I had this problem when I got my new Wi-Fi dongle and have seen a few people with the same issue. Basically when I have one interface configured and want to swap to the other one, it throws up this error:
RTNETLINK answers: File exists
Failed to…
theo-brown
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79
votes
3 answers
What is the optimum split of main versus GPU memory?
I read that it's possible to allocate either 128MB, 64MB or 32MB to the Raspberry Pi's video memory.
Given that my primary use case for this machine is educational: I will be running lightweight python scripts and web-browsing. Is it likely to…
Salim Fadhley
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79
votes
10 answers
What do I need to know to power from batteries?
What voltage range can it accept? What sort of batteries are appropriate?
Highly Irregular
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78
votes
5 answers
How can I determine when an SD card needs replacement?
Is there a way to estimate the lifetime of a SD card? If not, is there a utility I can use that monitors its integrity and reliability so I know when to use a new SD card?
ramblinjan
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78
votes
8 answers
Does Raspbian's repository have a browsable package list?
Raspbian claims to have "35,0000 Raspbian packages", which is great, but I'm only looking for a package or two before I install it.
Is there a browsable repository package list that I can search with a web browser without being on the device…
Zoot
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78
votes
1 answer
How does Raspberry Pi boot?
I have a raspberry mini computer and I am wondering how that thing does whole the boot process. I can compile my own kernel and init ramdisk with my own scripts and build my own minimal linux system on PC, but for that I need to use some bootloader.…
Petr
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77
votes
7 answers
How do I control the system LEDs using my software?
There are 5 LEDs on the RPi: OK, PWR, FDX, LNK, 10M.
I'd like to know if it's possible to control any of these from software i.e. turn them on, or change intensity (or even change colour gasp).
And if so, where can I read up about it? The LEDs could…
Maria Zverina
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77
votes
13 answers
How do I turn on my Raspberry Pi after shutdown?
My Raspberry Pi runs OpenELEC. The XBMC has a Power-button in the left-bottom corner where I can shutdown the Raspberry Pi. That works fine, but I can't figure out how to turn it on again after the shutdown. The only way I can make it start again is…
ThomasCle
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76
votes
5 answers
What is the maximum current the GPIO pins can output?
What is the maximum amount of current that can be pulled from a single GPIO pin?
Does the maximum current decrease if current is being pulled from multiple GPIO pins?
From my research, I've found:
An Arduino can pull 40 mA
People on the forums…
spuder
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75
votes
10 answers
How do I modify my Raspberry Pi to be powered over PoE?
Is it possible to modify the Pi, so that it can receive it's power via Power over Ethernet (PoE)?
I would like to be able to power my unit via the ethernet cable, so that I don't have to worry about running power cords around the place.
darryn.ten
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75
votes
3 answers
How much power can be provided through USB?
I know that my USB powered Hard Drive doesn't work, but what is the minimum power requirement that the Raspberry Pi can fulfil for devices that connect via USB?
Jivings
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75
votes
7 answers
Upgrade to Raspbian Jessie
How can I perform an upgrade from Raspbian Wheezy to Jessie?
Fragmentation Needed
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75
votes
4 answers
Can I use an airtight case?
Is it possible to reliably run a Pi in an airtight (watertight) case or is some form of ventilation required for cooling? I'm assuming it doesn't chuck out too much heat, but am wondering whether running it indefinitely this way may cause issues.
berry120
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