my notebook is panasonic cf-r3 and i also have this problem on 8.10 with kernel 
2.6.27-7. it happens everytime after suspend and resume, even if i blacklist 
the video module.
it works fine if i boot with kernel 2.6.24-21(the old kernel of 8.04)

note: i am using third-party pcc-acpi driver from http://www.da-
cha.jp/letsnote with the kenel 2.6.26 patch posted below. the driver
works fine and i can adjust brightness no problem before i resume from
suspend.

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toshiba laptop brightness not adjustable after hibernation
https://bugs.launchpad.net/bugs/102099
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