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[Bug 764195] Re: laptop screen blacklight brightness always at 100% (even on battery), can't be lowered

 

I had a similar problem. GRUB configuration change didn't work. Adding
stuff to xorg.conf neither. But I managed to "fix" it using a Python
program that binds to D-Bus signal BrightnessChanged and sets the proper
brightness using nvclock command. Check this out at my blog:
http://piotr.gabryjeluk.pl/dev:ubuntu-11-04-natty-on-sony-vaio-sz640

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https://bugs.launchpad.net/bugs/764195

Title:
  laptop screen blacklight brightness always at 100% (even on battery),
  can't be lowered


References