Ubuntu
linux package

  1. Bug #1173352
  2. Comment #4

Comment 4 for bug 1173352

Revision history for this message
Erik Nasaroff (erik-nasaroff) wrote : Re: Brightness keys don't work as expected on Lenovo W530

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