Comment # 5 on bug 1174047 from Takashi Iwai

The *.26 kernel is built from the very same source as *.20 but just signed with
a correct key (*.20 broke some secure boot-related stuff).  So it's no wonder
that it didn't work.

A patch included recently was identified to be the fix for this problem, so the
next kernel should work.  I close this now with that promise; if the next one
is still broken, please open.  Thanks.