[Gutsy] gnome-power-manager does not display notifications of any kind

Thank you for reporting this bug. Thanks to people who keep submitting bugs is Ubuntu becoming better and better.
But unfortunately your bug report doesn' t contain enough information to solve the problem.
Could you please add the following?
-The output of ' uname -a'
-The output of 'sudo lspci -vvnn'
-The output of 'sudo dmidecode'
-And could you please hibernate/suspend and than restart the system and after that attach /var/log/kern.log.0 ?
If the output is quite large, please put it into a file and add it as an attachment, this makes the bugreport better readable.
By the way, is your BIOS very old? Upgrading it may solve the problem, but only if it is old.

here is the information that you requested

output 'uname -a'
Linux Gutsy-Gibbon-Mobile 2.6.22-14-generic #1 SMP Sun Oct 14 23:05:12 GMT 2007 i686 GNU/Linux

Thank you for your information. However, I thought of something else which would be useful to know. Could you please post kern.log and acpid.1.gz, both located in /var/log, after your systems was shutdown because the battery was empty(I think almost empty would do the job too, since something should have be don already).

I can confirm this for a fresh install of Gutsy on a Dell Latitude D630. If /apps/gnome-power-manager/general/use_time_for_policy in gconf is unchecked and the values for percentages in /apps/gnome-power-manager/thresholds are set to higher values, the low/critical/action-messages are displayed and the policy for critical battery works correctly. The message for fully charged battery is still not displayed, though.

Similar happens to me with a fresh install of Gutsy on a Dell Inspiron 9400 / E1705 with the latest BIOS.
When battery is critically low, no message is displayed and continues until battery is fully discharged and computers powers off.

uname -a:
Linux Vanquish 2.6.22-14-generic #1 SMP Sun Oct 14 23:05:12 GMT 2007 i686 GNU/Linux

Thank you for your information. Now we only have to wait until someone of the devs find this bug and goes to fix it. and someone with the rights to set importance, since I don't have them (yet).
If you or someone else has more information, please post it, everything will be useful.

Ok, the messages for low and critical battery are now displayed on the Dell Latitude D630 and the system shuts down/hibernates when the battery reaches the set mininum. To achieve this, I had to go through the following steps:
In gconf-editor: uncheck /apps/gnome-power-manager/general/use_time_for_policy.
In gconf-editor: set the percentage values at /apps/gnome-power-manager/thresholds to higher levels, e.g. 90, 80 and 70.
Reboot.
In gconf-editor: set the percentage values at /apps/gnome-power-manager/thresholds to reasonable levels, e.g. 10, 5 and 3.

The message that ought to appear when the battery is fully charged, is still not displayed, thought (but it isn't much of a problem either).

Isn't this bug 135548?

Yes, seems to be the same as 135548. I marked this report as a duplicate. I cannot confirm whether the fix for 135548 works for the Dell Latitude D630 because I don't have it anymore.