Re: Is hibernation broken?

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On Sat, 2016-09-24 at 10:10 -0600, jd1008 wrote:
> 
> On 09/24/2016 08:20 AM, Ranjan Maitra wrote:
> > 
> > On Sat, 24 Sep 2016 10:12:23 +0100 "Patrick O'Callaghan" <pocallaghan@xxxxxxxxx> wrote:
> > 
> > > 
> > > On Fri, 2016-09-23 at 18:23 -0600, jd1008 wrote:
> > > > 
> > > > On 09/22/2016 05:24 PM, Patrick O'Callaghan wrote:
> > > > > 
> > > > > I'm using kernel-4.6.6-300.fc24.x86_64 with the proprietary NVidia
> > > > > driver, plus daily updates from the stable repos. Hibernation used to
> > > > > work with previous kernels, but now regularly fails to wake up
> > > > > properly, i.e. on restarting I get the BIOS screen followed by the boot
> > > > > text console and select the first (newest) option as usual. So far so
> > > > > good. Then after a few seconds I see the BIOS again, repeat the
> > > > > selection, and get a full reboot.
> > > > > 
> > > > > Anyone else seeing this?
> > > > > 
> > > > > poc
> > > > I saw it once or twice.
> > > > The reason was (in my case) that when I hibernated, I had USB devices
> > > > hooked up.
> > > > When I rebooted without plugginf in those devices, it behaved exactly as
> > > > you describe.
> > > That's not the case in my setup. All USB devices have remained plugged
> > > in between hibernation and awakening.
> > Same here. The problem is machine-dependent and afflicts newer machines more than the older ones, in my experience, perhaps because the former have been tested more (by all).
> > 
> > Best wishes,
> > Ranjan
> > 
> OK, one thing to check:
> 
> $ cat /etc/default/grub
> GRUB_TIMEOUT=300
> GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
> GRUB_DEFAULT=saved
> GRUB_DISABLE_SUBMENU=true
> GRUB_TERMINAL_OUTPUT="console"
> GRUB_CMDLINE_LINUX="vconsole.font=latarcyrheb-sun16 $([ -x 
> /usr/sbin/rhcrashkernel-param ] && /usr/sbin/rhcrashkernel-param || :) 
> video=1366x768 
> resume=/dev/disk/by-uuid/281d4971-32b6-47e0-96a2-9bdc998a9b1c"
> GRUB_DISABLE_RECOVERY="false"
> 
> Does yours have the line
> GRUB_CMDLINE_LINUX  ??
> The resume= setting is necessary to hibernate.
> Once you set up this file , you will need to run
> grub2-mkconfig  -o /boot/grub2/grub.cfg
> 
> and reboot, and hibernate and reboot again.
> 
> P.S: you must reboot into same OS you hibernated.

I should perhaps have mentioned that hibernation was working (almost)
perfectly up until a couple of kernel updates ago. I say "almost"
because Bluetooth sometimes recovers and sometimes doesn't, but the
same happens with suspend/resume so I don't think that's relevant.

I compared my current /etc/default/grub file with the oldest backup I
have, dated some time in June, and they are identical. In any case,
this is what's in it:

$ cat /etc/default/grub
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="vconsole.font=latarcyrheb-sun16 $([ -x /usr/sbin/rhcrashkernel-param ] && /usr/sbin/rhcrashkernel-param || :) rhgb quiet resume=UUID=1431e6d2-531e-46cd-8633-1cf878c6b2a1"
GRUB_DISABLE_RECOVERY="true"

I note that the last line has "true" instead of "false", so maybe it
shouldn't have worked before and now is failing correctly ...

poc
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