I'm running Xubuntu Feisty on my AMD Turion 64 laptop with an  Nvidia
6150 graphics card. I cannot use the Fn key for any purpose, including
adjusting the brightness. somewhere on the net I found that one could do
this by "echo {reqd br. level} > /proc/acpi/video/*/LCD/brightness".
however i cannot save the file even in sudo mode.... gives an error like
"file has changed... still want to save?" It doesn't save even if i
answer 'yes'. Attaching the contents of the brightness file......... pl
help.

** Attachment added: "copy of the brightness file"
   http://librarian.launchpad.net/7888890/brightness

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LCD Brightness on Laptop Always Set Very Low at Boot
https://bugs.launchpad.net/bugs/12637
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