I was thinking about buying a Raspberry Pi, and running Ubuntu on it. I have looked around the web, and a lot of stuff says that it's difficult for it to work on ARM processors. Has anyone figured out how to get a Raspberry pi to run Ubuntu?
From the Official FAQ Page at Raspberry Pi:
Source: My answer on Raspberry Pi SE
It seems that since the launch of Raspberry Pi 2, Snappy Ubuntu Core can be run on RP2.
However, it should be noted for the anxious that this is not a desktop version of Ubuntu.
The complications you refer to regarding ARM are a common issue for all distributions, they are not Ubuntu-specific. They stem from the fact that ARM has a number of different architectures, offering limited to no compatibility between each other.
The leading Linux ARM distributions are the following (excluding Gentoo which by definition is compiled to the exact target), and I am listing the corresponding target architecture:
To your specific question, the Raspberry PI runs a BCM2835 (ARM1176JZF-S) Broadcom CPU. This is armv6k architecture, which is not compatible with recent builds of Ubuntu, which are optimized for performance at the expense of compatibility with older chip designs like this Broadcom's.
The obvious choice is to run the armel architecture of Debian -- you will feel almost at home as if you were on Ubuntu.
Revisiting this a couple of years later, there are now multiple models of R.PI available on the market:
Raspberry PI A, B, A+, and B+: These are not compatible with Ubuntu ARM builds, as they use the BCM2835 Broadcom CPU.
Raspberry PI 2, model B: this runs a BCM2836 Broadcom CPU. This is ARMv7 architecture, a Cortex A7 to be precise. This board (and presumably all subsequent "series 2" R.PI boards) will run Ubuntu just fine.
Canonical has released Ubuntu Core (aka "Snappy") for the R.PI 2, this is already available, but it bears noting this is a server distribution with no desktop environment.
Currently not - Canonical only support ARM's ARMv7 processor architecture and the Pi has an ARMv6 chip.
protected by Community♦ Apr 24 '13 at 3:53
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