On Tue, Nov 4, 2014 at 9:17 AM, Jonathan Corbet <corbet-ft@lwn.net> wrote:
 - Under F21, suspend seems to work fine, but there is no response to the
   power button (or any other input).  One has to hold the power button
   until the firmware gets fed up and powers things down hard.


I had the same problem with mine (X1 Carbon second generation) until I updated the UEFI firmware on it.  Since updating that, I haven't had any problems with suspend or resume.

--
Jared Smith