hibernate not working

kueitao · Apprentice Joined: 22 Jan 2005 Posts: 241

Hi all,

When I suspend to disk with "hibernate" the machine seems to do that properly, but when I want to resume I am not given the machine status I had before hibernating. Instead I get a usual boot sequence. It seems like the operating system can't see the machine having a valid swap partion from which to resume.

To the contrary "hibernate-ram" seems to work properly: the machine is shutdown and afterwards it is resumed normally.

Any idea either to better debug this behaviour or to solve the issue?

Thanks in advance to anyone who will reply.

fabio

rh1 · Guru Joined: 10 Apr 2010 Posts: 501

Maybe you need to add resume to kernel line in grub.conf?

Hu · Administrator Joined: 06 Mar 2007 Posts: 23082

What kernel version are you using? Which hibernation method are you using? If you are using uswsusp, what messages does the initramfs resume print when it rejects your hibernation image?

kueitao · Apprentice Joined: 22 Jan 2005 Posts: 241

kueitao · Apprentice Joined: 22 Jan 2005 Posts: 241

Hu · Administrator Joined: 06 Mar 2007 Posts: 23082

Since you are using sys-kernel/gentoo-sources, we can rule out TuxOnIce based hibernation. To use that, you would be on sys-kernel/tuxonice-sources or you would have manually patched the kernel. Manual patching is involved enough that you would know if you had done that. Most likely, you are using uswsusp. What is the output of emerge --pretend --verbose sys-power/suspend; find /etc/hibernate/ -type f -print0 | xargs -0 grep -Hn '^[^#]'?

If you are using uswsusp as I suspect, then you must trigger a resume before mounting root. This is most easily accomplished using an initramfs. You can build the initramfs into the kernel or load it separately.

kueitao · Apprentice Joined: 22 Jan 2005 Posts: 241

rh1 · Guru Joined: 10 Apr 2010 Posts: 501

You can look here for help with making an initramfs.
http://en.gentoo-wiki.com/wiki/Initramfs
It actually pretty easy to do. Just do yourself a favor, you want to copy the device nodes like it states (null,console,tty) but don't rely on just copying "/dev/sda*" for your harddrives, use the section on mdev.

Not sure what your resume command should be, i use tux, but it should go after mounting /proc and /sys but before mounting root.
This might also help you:
http://en.gentoo-wiki.com/wiki/Userspace_software_suspend

kueitao · Apprentice Joined: 22 Jan 2005 Posts: 241

Hu · Administrator Joined: 06 Mar 2007 Posts: 23082

It looks like you never configured the hibernate script, so it is running down all the possibilities until it finds one that works. You do not have sys-power/suspend installed, so you are not using s2disk like I expected. That in turn means that the resume command from sys-power/suspend is not the right thing to restore the system. I suppose you are using the sysfs based suspend method. I have never tried to restore a kernel from that mode, but based on the documentation, it looks like you should echo the major and minor numbers of your resume device into /sys/power/resume. See the example script in Documentation/power/swsusp-dmcrypt.txt.