Created attachment 112047 [details]
dmesg output from a successful 3.18 boot

3.19 kernels having been hanging for me during boot for one of my machines. 
This is still happening as of commit dc9319f5a3e1f67d2a2fbf190e30f6d03f569fed
(post rc3). The problem first happens with commit
ad4a362635353f7ceb66f4038269770fee1025fa. I tried reverting
ad4a362635353f7ceb66f4038269770fee1025fa from
dc9319f5a3e1f67d2a2fbf190e30f6d03f569fed, but there were conflicts and I don't
know enough to properly resolve them.
The hang is early enough that I can't get logging output from the boot.