On Wed, Apr 20, 2016 at 11:18 AM, Josh Boyer <jwboyer(a)fedoraproject.org> wrote:
On Wed, Apr 20, 2016 at 1:09 PM, Chris Murphy
<lists(a)colorremedies.com> wrote:
> Hi,
>
> Do Fedora kernels inhibit hibernation (linux suspend to disk) when
> UEFI Secure Boot is enabled? I'm pretty sure the answer is yes but I'd
Yes. Hibernation is not possible if SB is enabled.
OK good. Googling, there's some idea of getting signed hibernation
images so that this could be reenabled? But those are old like
2012/2013 era. Is there anything more recent about where this is? Or
maybe it requires some other work like the
> rather not poke the NUC with a stick... My expectation is if I do
> 'systemctl hibernate' that I'll get some kind of message rather than
> hibernation?
At a kernel level, we eliminate hibernation as a choice for power
state. You'll see a lack of the 'disk' option in /sys/power/state and
/sys/power/disk should say '[disabled]'. What systemd does with that
information, I have no idea.
Confirmed:
[root@f23s ~]# mokutil --sb-state
SecureBoot enabled
[root@f23s ~]# cat /sys/power/state
freeze mem
[root@f23s ~]# cat /sys/power/disk
[disabled]
I'll try 'systemctl hibernate' some other time and report back what
happens if it's remarkable.
--
Chris Murphy