when battery power is critical

[Chris Murphy]

On Sun, Sep 27, 2015 at 7:42 PM, kendell clark <coffeekingms at gmail.com> wrote:

> You should definitely be able to change the autosuspend settings. Just
> press enter on the item and a menu should appear with buttons.

I can, it's just that there's an incongruence among the default
setting (off), the notification I get (it will hibernate), and what
actually happens (sleep/suspend to RAM).

For a 1% battery state to result in anything other than power off or
hibernate (suspend to disk) seems like a bad idea. And since
hibernation is variably broken, that's probably not a good option.
https://bugzilla.redhat.com/show_bug.cgi?id=1206912


Like I mention in the bug, hibernation depends significantly on the
firmware on today's hardware. But on Linux it depends on booting
normally, and the kernel discovering the hibernation image, but I've
never seen this work on any EFI Mac systems I've tried this on: the
kernel claims to look for a hibernation image but doesn't find it.
This happens whether resume= is set on the kernel command line or not.
On BIOS it resumes only if resume= is on the kernel command line even
though this supposedly is handled by initramfs, but anaconda doesn't
include any hibernation support (neither the resume= nor does it
create a sufficiently large swap partition).

And then there are the IRST supporting laptops, and while there's some
kernel support for this I don't know if systemd or GNOME will leverage
it. The RAM to disk dump is definitely always unencrypted though.



-- 
Chris Murphy