I just tried it with the 3.9.0-030900rc8-generic kernel. It's not fixed.
I missed it in the original report, but without adding the
acpi_backlight=vendor boot option it actually doesn't even change the
brightness. (Stays at maximum.)
Made a video about the problem, I realize that you can't see the backlight
brightness actually changing.
The first part is without the acpi_backlight=vendor boot option and the second
part is with it.
http://www.youtube.com/watch?v=tvzeIKQ0P-I
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1173352
Title:
Brightness keys don't work as expected on Lenovo W530
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