Christopher M. Penalver, thanks for your clear instructions.
I tested with linux-image-3.12.0-031200rc6-generic, and this problem persists.
I also found that when booting the machine, I can adjust the brightness when
GRUB2 is loaded, and then when I boot into Ubuntu, I'm stuck at whatever
brightness level I had in GRUB2.
Good hunting, and thanks!
I'll be happy to offer any more information you might need.
** Tags removed: needs-upstream-testing
** Tags added: kernel-bug-exists-upstream
kernel-bug-exists-upstream-3.12.0-031200rc6
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1178727
Title:
8086:0046 Screen brightness can not be adjusted in Raring with Intel
Ironlake graphics
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