Software suspend and GRUB

adriaanbw · 01-08-2005, 09:31 PM

For reference, I have followed the kernel-HOWTO for compiling kernels in parallel with the software suspend HOWTO at http://softwaresuspend.berlios.de/index.html.

In the swsusp-howto it indicates that its necessary to append "resume2=swap:/dev/hdc5" as a kernel parameter in lilo.conf (hdc5 is my swap partition).

However, I don't use the LILO bootloader, I use GRUB. So i have the following entry in my /boot/grub/menu.lst file:

Code:

title Fedora Core (2.6.9)
        root (hd0,2)
        kernel /vmlinuz-2.6.9 ro root=LABEL=/ rhgb quiet acpi=on resume2=swap:/dev/hdc5
        initrd /initrd-2.6.9.img

However, dmesg has the following:

Code:

Software Suspend 2.1.5: Software suspend is disabled.
This may be because you haven't put something along the lines of

resume2=swap:/dev/hda1

in lilo.conf or equivalent. (Where /dev/hda1 is your swap partition).

Has anyone used software suspend with grub? anyone have an idea why this isn't work? I am 90% sure that hdc5 is my swap partition, the following line is in my /etc/fstab

Code:

LABEL=SWAP-hdc5         swap                    swap    defaults        0 0

aus9 · 01-17-2005, 08:46 AM

I know nothing but you may want to look at this
http://lists.emperorlinux.com/piperm...ay/000001.html

which suggests you have acpi=off?

and this looks hot
http://www.cri.ch/linux/docs/sk0011.html

if it works can you provide some feedback and I will eventually stick in in my howto......but I am very reluctant to try it myself as I am a dinosaur

adriaanbw · 01-17-2005, 05:35 PM

Thanks Aus9, Tell you what... I will try it out this weekend (I recently reinstalled Linux from scratch in a hurry and dont have a custom kernel compiled yet).

An interesting point about the acpi=off. The first link would suggest that it should be off although they were using apm and not acpi. I thought SoftwareSuspend used ACPI.

Then I read the second link and it has a section on the end on controlling ACPI events, such as lid close etc, and assumes you have acpi on. Now by default the acipd service is started at bootup on my system, but I dont necessarily have the acpi=on parameter passed to my kernel. However, if i want to get an accurate battery status, i must have ACPI turned on.

Nevertheless, i will follow the instructions in the link and give it a shot. I may have to sacrifice accurate battery information for software suspend. I guess the only plus in that is that if my battery is running low, i can suspend!!