I've pasted my notes so far:
http://pastebin.com/TapNxJrE

What's lacking are my startup scripts that are semi-done.

Basically what is needed is :
put a ubuntu filesystem in /usr/local/ubuntu
create a script that bind mounts what is needed and chroots into /usr/local/ubuntu, and starts your window manager.
Start the second X server : xinit <your-script-here> -- :1
In order to get opengl you need libdrm and libmali from chromeos, and make libGLESv2 point to libmali.
This is the script responsible for bind mounting and chrooting:
http://pastebin.com/EE2xuFqK
And this is the frontend script I use to start with:
http://pastebin.com/npXFjX7S

It is not nearly done, the missing prepare.sh script is for doing stuff before chrooting and start.sh is for doing stuff after, and eventually starting the window manager. I hope you can get some meaning from this until I can make it more available.

For info what is supported and how under Ubuntu read my blog: http://marcin.juszkiewicz.com.pl/

Thanks for the instructions! I will have to try that out at some point. Please let me know if you figure out how to get around the bugs you mention.

On a similar note, would it not be possible to just copy over the X server executable (and modules, and anything else tied to the X server) from the Chrome OS partition to the Ubuntu filesystem (ie. without using chroot from within Chrome OS)? Isn't the X server fairly stand-alone, or are there too many dependencies for this to be possible?
As far as I can see, the only thing that prevents copying binaries from Chrome to Ubuntu is the fact that Chrome uses a different X version than Ubuntu, so I've been thinking about completely replacing Ubuntu's X with Chrome's, so the binary extensions/drivers from Chrome OS can be used in Ubuntu.

Users...

Instead of copying random binaries please read my blog. You will get some instructions how to do few things to get Ubuntu running without such random hacks you are trying to describe.

I have published a test of Efika Mx Smartbook with Debian 7.0 vs Toshiba ac-100 with lubuntu 12.10
http://deliriotecnologico.blogspot.it/2 ... armhf.html
and at the end won Efika mx!
Go more deep to know why...

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http://deliriotecnologico.blogspot.com

The big companies decided to discontinue netbooks because they thought it cut into sales of their high priced laptops. I think that was a mistake and left a big unmet demand that some company needs to capitalize on. Currently my favorite computers are my Asus eee 1000HA and my Genesi i.mx51 Smartbook because they are light, compact and great for going places. I think Genesi could be the low priced leader in this category. I don't want a tablet or touch screen but do want a good keyboard, quad core ARM Cortex A15 processor, Bodhi Linux OS, hdmi, Pixel Qi screen, white or silver color and about the same size as the current Genesi i.mx51 Smartbook.