"Flexible" Linux desktops remain marked as 'Used' despite being powered off

Question

I remember reading in the release notes for VDI3 Patch #2 that non-Windows OS such as Linux should now be properly 'recycled' as well (I thought that this was why VirtualBox was upgraded from 2.0.8 to 2.0.10)
Either I am doing something wrong or there is still a bug ... But on the POC setup I am currently working on the recycling just never ever happens. Linux VM's are still being considered as being "in use" despite having been powered off. I played with the power management settings so the Linux VM should automagically go to 'sleep' after a few minutes of idle time. If I don't do that the Linux VM's are running forever. I also tried playing with the Kiosk timeout settings. The default was "12000" seconds, so for the sake of testing I put it as low as 300 seconds (= 5 minutes). But this too doesn't change anything.
So the big question here: How can I force VDI3 to consider Linux desktops as being "Idle" and thus "unused" so it would properly trigger the desktop recycling?
EDIT: Right now I am using this shell script as 'Workaround' ... You'd just need to add it to a "cron" job or something like that. Comments on improving this rig are welcome :-)
#! /usr/bin/bash
FLEXVDAPOOLS=`/opt/SUNWvda/sbin/vda pool-list | /usr/bin/tail +2 | /usr/bin/grep 'flexible' | /usr/bin/awk {' print $1 '}`
for POOL in $FLEXVDAPOOLS
    do
        export POOL
# The following line should countain exactly 10 x whitespaces between the words 'Powered Off' and 'Used' on the same line
        /opt/SUNWvda/sbin/vda desktop-delete `/opt/SUNWvda/sbin/vda pool-desktops $POOL | /usr/bin/grep 'Powered Off          Used' | /usr/bin/awk {' print $2 '}`
done
unset POOL.
Edited by DJ .... My workaround is working.

Answer 1

If the user powers off the desktop (instead of just logout),
then the desktop is not correctly detected as idle. Sorry, but this does not seem to be true. If the user really shuts down the VM then VDI3 does correctly detect the VM as being "idle" and initiates the recycling. What we did here is that we configured the Ubuntu VM's to go into hibernation after 15 minutes if they're idle. I know, I know: Hibernation doesn't work. That's not the point. The point is that VM's won't consume too many resources on the desktop provider if they are idle. To VDI and VirtualBox such a "hibernating" system appears to be "Powered Off" as well, so we assumed it would trigger the recycling too. But it just doesn't happen, such an auto-hibernated Ubuntu VM is still being considered as being "Used" ... which is kind of silly: How can it be "used" if it's "Powered Off"? Especially since we're talking about a flexible pool. By logic a VM can't be "used" in a flexible pool if it's "Powered Off". Hence my workaround above (customer is very happy with it).
I share Dirk's view ... this seems to be a bug. VDI should regard "Powered Off" VM's as being "Idle", especially if they are in a "flexible" pool.