I just confirmed that
$ uname -a Linux flimsy 4.12.0-041200-generic #201707022031 SMP Mon Jul 3 00:32:52 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
works, and that
$ uname -a Linux flimsy 4.12.0-041200rc2-generic #201801312242 SMP Wed Jan 31 22:44:06 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
does not work.
I just confirmed that
$ uname -a 041200- generic #201707022031 SMP Mon Jul 3 00:32:52 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Linux flimsy 4.12.0-
works, and that
$ uname -a 041200rc2- generic #201801312242 SMP Wed Jan 31 22:44:06 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
Linux flimsy 4.12.0-
does not work.