Hello,
I am using a Lenovo Edge E530 and, with kernel 3.11.0-rc3, I had to change to this parameter to the kernel boot:
GRUB_CMDLINE_LINUX="acpi_osi="!Windows 2012""
instead of previous
GRUB_CMDLINE_LINUX="acpi_osi=Linux acpi_backlight=vendor"
to be able to change brightness. In some kernel versions before, it worked, but with 15 levels, but in graphical system brightness bar was not moving.
Now I have, though, 8 possible values for brightness and brightness bar shows its correct position.
Josep
On 2 August 2013 08:00, Aaron Lu aaron.lu@intel.com wrote:
On 08/01/2013 04:07 PM, Borislav Petkov wrote:
On Wed, Jul 31, 2013 at 11:16:52PM +0200, Rafael J. Wysocki wrote:
Does reverting efaa14c help?
Nope.
But see my other reply to Aaron.
Assume you have specified to use intel_backlight in xorg.conf, does booting with video.brightness_switch_enabled=0 help?
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