Hello,

I have a dual core laptop with 2GB RAM (Nvidia graphics card) that
hibernates and resumes correctly close to 90% of the time. OS : Linux
Ubuntu Hardy. Great improvement in that success rate over Gutsy.

However, there is one wrinkle to this. When I resume, I find that a x MB of
RAM is still occupied while y MB of RAM is listed as free (from the output
of top). And x = approx. 0.5 * y, so there is plenty of RAM available. This
is the case even 5-10 minutes after resume.

Since using the swap inevitably slows down the machine (not to mention cause
needless disk activity), I usually rectify the situation by :

$ sudo /sbin/swapoff -a; sudo /sbin/swapon -a

This takes some time(approx 2 minutes) but frees up the swap.

Why doesn't resume do this on its own ? I am using in-kernel suspend (not
suspend2 or tuxonice). Further, if it matters, all my partitions
except /boot, including swap, are LUKS encrypted.
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