[spindritf]

I'm not aware of any fully supported ultrabook. Something always seems to be unsupported or not fully supported but usually inessential, like a fingerprint scanner, or an accelerometer.

A friend of mine is using a Zenbook but it takes some serious efforts to get it to run properly https://help.ubuntu.com/community/AsusZenbook

It's also a matter of what you consider an ultrabook. I have a Dell V131. It's a laptop IMHO but it has a 13.3" screen, weighs 1.8kg, gets 6hrs of battery life (with wifi on a 6 cell battery) and works under Ubuntu 12.04 OOTB (except for the fingerprint scanner :)

[balac]

I'm using a zenbook and with the 3.2 kernal (included in ubuntu 12.04beta) almost everything is working great. There is a small change that is needed to enable suspend, but otherwise everything works out of the box with no extra drivers needed (including wifi, two finger right click, camera, 3d graphics, etc.).

[asdfpoiu]

Can you tell us how the battery life is?

[balac]

Under linux (normal web browsing, coding, etc.) I get around 5 1/2 hours. With windows that goes up to around 7 hours. I think much of the windows battery saving comes from the very low power mode it switches into automatically when you unplug the laptop. This mode can be a little annoying though as it powers down the cpu and you can't do basic stuff like watching a high quality video smoothly, etc. As far as I can tell under Linux the power saving mode is much more conservative.

[wickedchicken]

The touchpad on the Zenbook is absurdly bad, nearly unusable. I was hoping they would stick with the Elantech found on the Eees (these are rather well supported) but instead it's a 'Sentelic.'

[balac]

Actually Zenbooks ship with two different touchpads, mine has the Elantech and works OK.