linux-kernel - Re: hibernate a system booted from external USB drive

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Message-ID: <4F943AE1.5050207@msgid.tls.msk.ru>
Date:	Sun, 22 Apr 2012 21:07:45 +0400
From:	Michael Tokarev <mjt@....msk.ru>
To:	Toralf Förster <toralf.foerster@....de>
CC:	linux-kernel@...r.kernel.org
Subject: Re: hibernate a system booted from external USB drive - is it posible
 ?

On 22.04.2012 20:49, Toralf Förster wrote:
> I wonder, whether it is expect to work with current stable kernel 3.3.2 or 
> not. Seems not to work here (s2ram works fine).
> Hibernate however writes data to the swap partition, but during wakeup I get :
> 
> kernel: PM: Hibernation image partition 8:6 present
> kernel: PM: Looking for hibernation image.
> kernel: PM: Image not found (code -22)
> kernel: PM: Hibernation image not present or could not be loaded. 

This is entirely an initramfs issue/question.  The device should be
present in early userspace when it attempts to resume.  Also, s2ram &Co
may not be prepared for changing device name/node.

I've a system with only one "drive" being an usb flash stick (Sandisk
Cruzer Fit).  This system is able to hibernate and resume just fine,
but I don't do it often (it is our router).

/mjt
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