g-p-m can't choose the right icon

I wanted to specify that I'm using a

ASUSTeK Computer Inc.
M6Ne
1.0

maybe it might be an acpi-implementation issue... But I don't think it's difficoult to fix it,

It says 'shutdown' above, do you mean 'suspend' or 'hibernate'?

no! a real shutdown!
simple steps to be as much clear as possible:
1) unplug AC and wait for the battery to be a bit discharged (a good
value to make sure this happens is 80%)
2) do a "sudo halt" or halt using the system menu
3) wait the complete shutdown
4) plug in the AC and start the computer (we need battery to be enough
low, otherwise it gets fully charged before n-m starts)
5) now the icon is wong! (but the text popup is ok)

I've noticed a recent n-m upgrade, tomorrow I will test if this bug is
still present!

On my laptop the issue rises (at least) when the laptop is started with AC disconnected and battery not totally full. The tooltip is correct ("running on battery..."), but the icon is the one displayed when the battery is charging.

By plugging AC in and taking it out again the icon changes to the correct one. Tooltips are correct all the time.

The above comment is exactly the situation I see. It only happens on a cold start, not from hibernation or suspension.

using edgy and the bug is still present! again only after a normal shutdows (no hibernate or suspend)

It sounds like your battery might not be reporting the correct levels.

Could you run:
  $ (for i in /proc/acpi/battery/*; do echo = $i =; cat $i; done) | tee /tmp/battery.log
and attach /tmp/battery.log to this bug report?

Also, information as mentioned in https://wiki.ubuntu.com/DebuggingKernelProblems would be really helpful.

little error in the script:
(for i in /proc/acpi/battery/*; do echo = $i =; cat $i;/* done) | tee /tmp/battery.log

anyway the output is correct, and even gnome power manager gives only the correct tooltip over the icon (which is wrong, as if the laptop has no battery, and yes the icon is NOT shown if I choose "show icon only when the battery is charging/decharging", I have to choose "always show icon")

"the laptop is working under AC. battery: 29 minutes to complete charge"

dmesg shows
[17179603.400000] ACPI: Battery Slot [BAT0] (battery present)

Yup. It looks like the logic to decide which icon to use is busted.

not only that!
remember that the icon is not shown if you choose "show icon only when the battery is charging/decharging"
I don't know how this is implemented, but it can be that g-p-m thinks that there is no battery.

Ok that's fixed now