I'm currently working with 3 laptops and  here's a short report :

- Asus EeePC, 512 MB RAM, 700 MB swap, EeeXUbuntu 3 (equiv. Gutsy with a
2.6.24 kernel) : Suspend to disk works out of the box.

- Dell XPS M1330, 2 GB RAM, 4 GB swap, Ubuntu Hardy latest
2.6.24-17-generic kernel: Suspend to disk works out of the box.

- Acer Aspire 3104WLMi, 1 GB RAM, 2 GB swap, Ubuntu Hardy latest
2.6.24-17-generic kernel: Suspend to disk fails with "swsusp: Not enough
free memory"

=> On this machine, the proposed workaround: "echo 2048248 >
/sys/power/image_size" immediately solved the issue and allowed suspend
to disk to work (thanks).

Any idea about how to figure out the optimal value for this machine ?

(As an addition, on all these 3 machines, suspend to disk works with
swap on an encrypted LVM)

-- 
Suspend to disk fails: image_size too small
https://bugs.launchpad.net/bugs/88377
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