Panasonic lcd brightness interface is never detected because hald looks for a non-existent file named pcc/brightness. The pcc-acpi module actually uses files pcc/ac_brightness and pcc/dc_brightness. Further details can be found at http://www.da-cha.org/letsnote/
Close the bug since there should be a up-to-date sysfs interface for this since some time. It should work out of the box now.
*** Bug 14146 has been marked as a duplicate of this bug. ***
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