Hi,

I am having trouble getting my system to hibernate or suspend. I'm running Debian Etch on a Pentium 4 CPU w/ hyperthreading (shows up as 2 CPUs).

When the system tries to go into Hibernate (using Gnome Power Manager), the screen goes black for a moment, then comes back on. However, at this point nothing works when I try to launch any application and I have to restart.

I have checked the /var/log/syslog after this happens, and the sleep process stalls after the line:

"SMP Alternatives: Switching to UP Code"

I have tried some solutions I found by searching internet, among them enabling Frequency Scaling and changing the Frequency Scaling Governor to "Performance" or "Powersave". Neither of these worked.

I also tried switching the sleep mode in BIOS from "S1" to "S3", which changes my "Hibernate" option to "Suspend". When I set the system to Suspend, the exact same thing happens. Changing the Frequency Scaling Governor did not work with this either.

I also tried disabling Hyperthreading in BIOS. I get the same results when trying to Sleep.

I have run out of options that I can think of. Does anyone have any other ideas?

Thanks

Did you find these posts? Looks like you aren't alone.

http://www.mail-archive.com/debian-k.../msg28755.html

http://www.mail-archive.com/linux-ac.../msg09596.html

Bump. I was still unable to fix the problem. Any other suggestions?

What version of kernel are you using? Have you tried moving to the latest version (2.6.23.12 at the time of writing)?

(Type "% uname -r" in a shell to find out)

I'm not sure if this has been addressed in later kernel releases but it seems to be an issue in and around 2.6.18.3. SMP switching being a kernel issue it has to be worth a try. (I run the above kernel in Fedora 8 on a dual core machine without a hibernate issue.)

If you haven't compiled a kernel before then there's a useful guide at http://www.debianhelp.co.uk/kernel2.6.htm

Try this page http://en.opensuse.org/S2ram
Also, you need the parameter 'resume=/dev/hdax' for suspend to disk,
In the kernel line in '/boot/grub/menu.lst', where '/dev/hdax' is a swap partition, and x is a number. You can try 'fdisk -l /dev/hda' to find the swap partition.

Thanks for your help. I did notice something when I disabled hyperthreading. The same thing happens (hibernate fails and freezes), but the last line of the syslog is different. It hangs on the line "sky2 eth0: disabling interface". I am currently using a wireless network.

I think I am going to try to upgrade the kernel because I have read that sky2 has had a lot of patches between 2.6.18-4-686 (what I am running now) and the latest kernel. I have just been hesitant to do so becuase this will mean I will have to reinstall the NVIDIA driver for my graphics card and I have had a hard time with that.