I installed the newest version of elementary OS recently on my Thinkpad Carbon second generation. The OS works fine. The only thing is that the computer is not shutting down when asked to. If you choose shut down the device is only logging out. If I want to shut the computer down I have to force the shutdown via the power button. I already did update and upgrade the Ubuntu drivers with no effect.
In my case
sudo shutdown -h nowwould hang too. I also tried changing the grub configuration as suggested in many posts, but still had the same result.
Boot into recovery mode by pressing the shift key at boot. From there go to 'Advanced Options. There is an option to run fsck to repair your disk. For good measure also perform the check grub option. After that, select reboot normally from the menu. The system will reboot and then should shutdown normally.