On Sun, 9 Nov 2014 16:31:07 -0700 Pete Travis <lists(a)petetravis.com> wrote:
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On 11/09/2014 03:38 PM, Martín Marqués wrote:
> Hi all,
>
> I was trying to get hibernation working on my F20 laptop with which I
work.
>
> Going through the process, which I thought would be more transparent
> or that it would just be like hitting the hibernation and that's it, I
> found great deficiencies in Fedora (maybe just from the kernel) and
> especially in the docs (or the lack of documentation in this
> particular issue):
>
> 1) I had trouble getting the system to hibernate. There wasn't
> anything clear about the fact that you needed to have a swap bigger
> than the amount of memory you have. Also, it doesn't work if you have
> a file as swap (which was the easiest way to start testing)
>
> 2) You need (or at least with my laptop) to add the resume=<swap FS>,
> this I did find information in the docs, but I'm a bit surprised that
> Fedora doesn't give better information about all this during the
> installation process.
>
> 3) When adding the resume= option to the kernel line in grub you can't
> use UUID like FS. That is a bug IMHO.
>
> Well that's as much as I remember now.
>
> At least I now have hibernation working correctly on my laptop.
>
> Regards,
>
Please file a bug[1] against the documentation you're referencing,
probably the Power Management Guide? That will help the guide
coordinator ensure that the issue is appropriately addressed. Point 1)
seems especially relevant, that much should be explicitly clear.
fwiw, it seems like hibernation is generally falling out of favor these
days. I know not everyone has newer systems, but those that do have
machines that use shockingly little power on suspend, and cold boot
faster than a resume from hibernate could ever achieve.
On point 3, one would hope that resuming from hibernate didn't require
you to manually edit the grub configs every time :) I'm not well versed
in the area, but it smells like at least one bug/deficiency from here.
[1]
http://docs.fedoraproject.org/en-US/Fedora/20/html/Power_Management_Guide...
The following thread of December 2013 may be useful.
https://lists.fedoraproject.org/pipermail/users/2013-December/443871.html
I think it was a rank bad idea on the part of Fedora to blindly follow stupid Ubuntu and
disable hibernation by default. As a result, it appears to me that this feature of the
kernel is not being tested enough, as evidenced from my tribulations using a Dell
Precision M3800. There is now no longer enough data on possible issues with this feature
for developers to put fixes on. (Not everyone realizes that the feature can be turned on,
and they give up on hibernation rather than try it and file bug reports).
Hopefully, Fedora will consider bringing back this "resume" feature enabled by
default in future releases.
Ranjan
- --
- -- Pete Travis
- Fedora Docs Project Leader
- 'randomuser' on freenode
- immanetize(a)fedoraproject.org
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