The problem is fixed with lucid lynx release.
closing
** Changed in: gnome-power-manager (Ubuntu)
Status: New = Fix Released
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gnome-power-manager doesn't display correctly if laptop runs over battery
https://bugs.launchpad.net/bugs/509680
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** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/38088521/Dependencies.txt
** Attachment added: DevkitPower.txt
http://launchpadlibrarian.net/38088522/DevkitPower.txt
** Attachment added: GConfNonDefault.txt
http://launchpadlibrarian.net/38088523/GConfNonDefault.txt