I am a big fan of Ubuntu and I use it with Gnome in my Dell Latitude E7440. I am about to join a company where I have an option between a MacBook Pro and a ThinkPad. I am planning to go with the latter. However, I would like to know if there are any existing issues between Ubuntu and the new X1 Carbon (3rd gen) before I request for the laptop. So if there are people who have any experience with this, I'll deeply appreciate their inputs. Thanks!
It works with Ubuntu 14.10 fine. There are some button problems that are being worked out. I've heard some stuff about external monitor issues, but haven't tested it. I'm typing this to you from my 3rd Get X1 Carbon now. It is a beautiful machine. The more I use it the more I find myself fond of it.
I'm dual-booting and had no problems setting that up. Bluetooth, wireless, suspend and all that are working. It has some hardware hibernation thing which I understand doesn't work, but suspend is fine for my purposes. I don't see much of a difference for my workflow.
I've not seen the graphical issues that are reported around the web. That may be I have a different screen or it may be solved at this point.
Current recorded Bug I know of: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1414930
Screen brightness is the other issue I'd really like to see fixed.
EDIT: Screen brightness adjustments are simply solved by loading the thinkpad_acpi module. It isn't detected properly apparently.
EDIT2: The BIOS "Deep Sleep" is working. This appears to be a hibernate equivalent that is entirely BIOS related. I can't figure out what the Ubuntu report means that identifies this as a problem.
Also, I forgot to mention, to get dual booting, I had to turn off "Secure Boot" in the BIOS or windows would fail to start from GRUB after I installed Ubuntu. As soon as I turned that off, Windows 8.1 was working great again in its shrunk partition.