Re: F24: waking up from hibernate no longer wakes nm-applet (however existing connection works fine)

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On Mon, 2016-08-29 at 18:37 -0500, Ranjan Maitra wrote:
> Hi,
> 
> I understand that Fedora has gone the way of my hated linux
> distribution (Ubuntu) in actively disconnecting hibernate in a very
> disappointing distribution, but I still think that someone may know
> what to do so I thought that I would post this here and get
> suggestions and advice.
> 
> I have set up, after installation, hibernate with F24 using the
> techniques that are now required since the days of F22 (or so). Here
> is what I did:
> 
> 1. In /etc/default/grub
> 
> add --> resume=UUID="****" <-- to the line GRUB_CMDLINE_LINUX= 
> 
> where the uuid is obtained using blkid.
> 
> then I do the following:
> 
> 2. sudo bash -x grub2-mkconfig
> 3. sudo bash -x grub2-mkconfig -o /boot/grub2/grub.cfg
> 
> and after rebooting, hibernate works.
> 
> However, of late, since F24, I have been having this problem that the
> laptop comes back from hibernate but the nm-applet does not.
> Basically, what happens is that the nm-applet has the disconnected
> symbol. The network does work (at the location it was working from
> when the laptop was hibernated). It will not work in a new location
> simply because nm-applet does not have the ability to provide me with
> a list of new possibly connections. I have not tried this part with
> ethernet but I suspect that the general idea would be similar.
> 
> The only way I can get back to using nm-applet to provide me with
> Wifi connections (beyond the one to which it has been connected) is
> by killing and restarting nm-applet. The process has to be repeated
> for every hibernate.
> 
> So, what should I be doing to avoid having to kill and restart my nm-
> applet? Is this a bug somewhere (some hook not being turned on, as
> used to happen with suspend in the bad old days of early Fedora) and
> if so, where should I file it (under what component in BZ)? 


While waiting for a bug fix, you might try setting up a post hybernate
action. I use suspend, but I found the below "fix" to work most of the
time to the need to hit the need for hitting a key to wake my monitor
after resuming from suspend. You would clearly need to change it for
your usage:

Command line to exit screen saver:
xscreensaver-command -deactivate
Added
to new file: cat  /etc/systemd/system/post-suspend.service
[Unit]
Descrip
tion=Run post-suspend
After=suspend.target
#After=hibernate.target
#After=
hybrid-sleep.target

[Service]
#ExecStart=/bin/xscreensaver-command -deactivate
ExecStart=/bin/su - user -c "/bin/xscreensaver-command -deactivate"

[Install]
WantedBy=suspend.target
#WantedBy=hibernate.target
#WantedBy=hybrid-sleep.target





> Many thanks and best wishes,
> Ranjan
> 
> PS: As an aside, one of the parameters in: /etc/default/grub, I have
> GRUB_DISABLE_RECOVERY="true" -- I also tried with 
> GRUB_DISABLE_RECOVERY="false" but there was no visible effect. I am
> not completely sure what this parameter does because it seems to give
> me the same result irrespective of whether or not it is set to
> "true".

If my personal note about that is correct, then here is what that is
about:

# Setting GRUB_DISABLE_RECOVERY to "false" will enable the single user
# mode / recovery entries.  The trouble is that the dnf auto install
# of new kernels does not use it so I would have to run
# `grub2-mkconfig -o /boot/grub2/grub.cfg` after each kernel update.
# I don't think it is worth bothering with.
GRUB_DISABLE_RECOVERY="true"

-- 
Doug H.
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