F16, XFCE/LXDE and hibernate button

[Bill Davidsen]

Joel Rees wrote:
> 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.
>
I was about to tell you that "mkswap" allows you to set the UUID and warn you to 
avoid two swaps with the same UUID created thusly, but you have a solution.

Two ways to look at the same problem!


-- 
Bill Davidsen <davidsen at tmr.com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot