Based on posts[1][2] to the linux-thinkpad list
OK, a couple of patches to apply to the Fedora Core 3 kernel to allow the Suspend2 patches to apply cleanly. I'm not taking any credit for these, other than being the guinea-pig for Bernard from the Suspend2 project and being prepared to go through a dozen or so fsck cycles and a lot of trial and error to fix them. Here's a recipe for compiling Suspend2 support in for those Fedora users who haven't before. Download the patches [above] - just two very small patches to prepare the FC3 kernel source tree for the standard Suspend2 patches. These don't remove any of the Fedora patches, they just do some jiggling so that the Suspend2 patches apply cleanly. Then download the standard Suspend2 2.6.10 kernel patches, version 2.1.5.15 (the latest) from: http://www.suspend2.net/ Having unpacked them, just add the two patches above to the directory of Suspend2 patches. Follow the instructions on the Suspend2 site above by running the ./apply script to apply them to your FC3 kernel source tree. Note that, for new FC3 users, FC3 doesn't come with a kernel-sourcecode RPM anymore - you need to install the kernel-<version>.src.rpm and then: # rpmbuild -bp --target=i686 /usr/src/redhat/SPECS/kernel-2.6.spec - the kernel source will then be in /usr/src/redhat/BUILD/kernel-<version>/linux-<version> Having applied the patches above, which should apply cleanly, supply your .config (see caveat below) and compile your Fedora kernel in the normal way: # make oldconfig # make # make modules_install # make install If you didn't change Makefile, your kernel will be installed at /boot/vmlinuz-<version>-prep. Check you have a grub entry for this kernel. Finally you need to do a little magic to your initrd image to make it work with initramfs in FC3 - see: http://www.suspend2.net/FAQ-6.html#ss6.4 I found I needed to add this line after mounting /proc and /sys in init. Download the hibernate script from the Suspend2 site, and try it out. Then you can tie this to a key combination with ibm-acpi, etc. Kernel config caveat: so far, it seems that you need to unset CONFIG_X86_4G in your .config. The FC3 kernel seems to set this on by default and it seems to stop the machine properly resuming. As mentioned before, FC3 contains enhanced 3D support for some thinkpad ATI cards, and they'll stop resume unless you turn on a couple of options in /etc/hibernate/hibernate.conf: SwitchToTextMode yes UseDummyXServer yes Remember Suspend2 is a work in progress, so you may want to test mounting / readonly at first from singleuser for safety first.