> I have a desktop on which suspend to RAM has always fails to resume when
> the BIOS is set to use S3 - when attempting to resume the video BIOS
> posts itself, warms the monitor up, powersaves it, posts itself again and
> goes to the regular BIOS post indicating a reboot. Hibernation started
> working many kernels ago. Windows 98 seems able to do suspend to RAM on
> S3 and Linux will suspend to RAM if S1 is set in the BIOS. The latest
> test was done with 2.6.25-rc5 (git tree pulled this morning) and the
> result is the same in kernels going back to 2.6.17 . Using pm_trace gives
> a magic number that doesn't match anything:
> [ 2.466686] Using IPI Shortcut mode
> [ 2.467205] Magic number: 0:691:51
> [ 2.468707] Freeing unused kernel memory: 320k freed
>
> (Originally filed on
>
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/86099 ).