Re: [gentoo-user] hibernate fails, "s2disk" not found

[Joshua Murphy]

On Thu, Oct 30, 2008 at 12:33 AM, Walter Dnes <waltdnes@××××××××.org> wrote:
> On Wed, Oct 29, 2008 at 12:27:39PM +0100, Pint?r Tibor wrote
>>> [d530][root][~] emerge -pv s2disk
>>> These are the packages that would be merged, in order:
>>> Calculating dependencies |
>>> emerge: there are no ebuilds to satisfy "s2disk".
>>>   Now what?
>>
>> emerge -pv suspend
>
>  First, I had to keyword "=sys-power/suspend-0.8 ~x86" in
> package.keywords.  I set up suspend.conf like so...
>
> snapshot device = /dev/snapshot
> resume device = /dev/sda6
> #image size = 350000000
> #suspend loglevel = 2
> compute checksum = y
> #compress = y
> #encrypt = y
> #early writeout = y
> #splash = y
>
>  Here is my disk layout
>
> [d530][root][~] fdisk -l
>
> Disk /dev/sda: 500.1 GB, 500107862016 bytes
> 255 heads, 63 sectors/track, 60801 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> Disk identifier: 0xd0000000
>
>   Device Boot      Start         End      Blocks   Id  System
> /dev/sda1               1       60801   488384001    5  Extended
> /dev/sda5               1          62      497952   83  Linux
> /dev/sda6              63         549     3911796   82  Linux swap / Solaris
> /dev/sda7             550       60801   483974158+  83  Linux
>
>  No, it's not LVM.  / is half-a-gig, followed by swap, followed by the
> rest of the drive.  I use multiple bindmounts to make things look
> normal.  When I tried "sync", followed by "hibernate" it shut down, but
> when I powered back up with the power button, here's what happened...
>
> - on the reboot, it complained about the superblock "last access" being
>  in the future (the half-gig partition is ext2)
>
> - it "fixed" the access date
>
> - complained that the hard drive was "dirty", i.e. not properly shut
>  down
>
> - rebooted
>
> - played back a whole bunch of disk transactions on /dev/sda7
>  (reiserfs).  Did i mention I ran "sync" before "hibernate"?
>
> - it did the rest of the ordinary boot process.
>
> - it did *NOT* restore anything from the previous session.  Do I have to
>  explicitly set something to tell it to restore a previous session?
>  Gentoo-wiki is stll down.
>
> --
> Walter Dnes <waltdnes@××××××××.org>

I've not touched hibernation, but from what I've gathered in 5 mins on
google, I've a few probable guesses. Firstly, the image of the system
set aside by s2disk leaves the system's partitions in a 'dirty' state
simply because they're technically still in use. Your kernel needs to
be told to look at /dev/sda6 for resuming, appending resume=/dev/sda6
(might be resume=swap:/dev/sda6, not sure) in your grub/lilo config
should handle that part, though I've a vague recollection of something
about a default resume partition last time I ran through menuconfig
too, so you may even be able to avoid that. When it boots, rather than
running through init and the usual, it needs access to the 'resume'
executable, which has to be usable *before* the system's current
mounts are reestablished... which means initrd or initramfs.  If you
already have both of those things (kernel knowing what the resume
partition is and having access to 'resume' where it wants it) as they
should be... I'm at a loss.

If you go to:
http://www.google.com/search?q=HOWTO+Userspace+Software+Suspend+(uswsusp)+-+Gentoo+Linux+Wiki
and then hit 'cached' under the first hit, it'll take you to google's
last copy of the page.

Also, as a side note, from http://www.freewebs.com/gkiagia/hibernate.html --
"WARNING: Never boot the suspended system with another kernel than the
one that you used to suspend and never try to mount suspended
partitions from another linux system, such as a live cd, otherwise you
will probably have data loss."

-- 
Poison [BLX]
Joshua M. Murphy