F16, XFCE/LXDE and hibernate button

[Joel Rees]

Proof my brain has not been working right lately --

On Wed, Apr 11, 2012 at 11:42 AM, Joel Rees <joel.rees at gmail.com> wrote:
> On Wed, Apr 11, 2012 at 9:50 AM, Rick Stevens
> <rstevens at corp.alldigital.com> wrote:
>> On 04/10/2012 03:55 PM, Joel Rees wrote:
>>>
>>> Anybody using XFCE or LXDE who are missing their hibernate button in
>>> the logout dialog after the recent kernel upgrade?
>>
>>
>> Which new kernel? I'm running 3.3.1-3.fc16.x86_64 and I see it.
>
> 3.3.1-3.fc16.i686
>
> If you're getting yours, it probably is not the kernel, so, ...
>
>>> Or should I suspect that moving the /home partition to a new partition
>>> yesterday is to blame?
>>
>> Possibly.
>>
>>> (Need to look up what I have to do with SELinux after a move like
>>> this. I remember there's something that needs to be done, don't
>>> remember exactly what.)
>>
>> "restorecon -R -v /home" I believe.
>
> Yeah. Restore context. That's one thing I need to do.
>
> Reset a bunch of context. but there's still no hibernate. Durn.
>

Today, I finally did what I should've done four days ago:

STW on "hibernate setting xfce"

Google gave me some nice threads on xfconf-query:

http://forum.xfce.org/viewtopic.php?id=4781
http://ubuntuforums.org/showthread.php?t=1830829

No man entry for xfconf-query, but --help gives enough clues for what
I might have needed in another case, but not here. setting the
hibernate setting to true with

xfconf-query -c xfce4-session -np '/shutdown/ShowHibernate' -t 'bool' -s 'true'

didn't help.

But this topic give me the clue I really needed:

http://forums.linuxmint.com/viewtopic.php?f=197&t=97684

Really simple. on4aa pointed out that I need a functional swap for
hibernate to work. Since I had moved both /home and swap, I thought
maybe I should check, and, sure enough, swapon -s listed no active
swap. Checking /etc/fstab (Significantly cleaner on this netbook with
a fresh f16 than on my aging tower with an install that I've been
upgrading since F10 or before.) showed the entry for swap, so I tried

swapon -a

and got a message about the UUID not matching. Yep. Never fixed it
after the move. I guess the dd on the /home partition restored the
UUID, since it matches what is in fstab. Anyway,

ls -l /dev/disk/by-uuid

showed me the new UUID, and I checked the swap partition again with
gparted because my memory just ain't what it used to be, and edited
the fstab swap entry with the new UUID and now swapon -a turns the
swap on and, yay! there is my hibernate button.

Thanks for the suggestions, Rick and Bruno.

--
Joel Rees