On 08/02/2013 02:25 PM, Josep Lladonosa wrote:

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\""

What if you remove the above from kernel command line, and add
video.brightness_switch_enabled=0 to kernel command line, then set the
following in xorg.conf:
$ cat /etc/X11/xorg.conf
Section "Device"
        Option     "Backlight"	"intel_backlight"
	Identifier  "Card0"
	Driver      "intel"
	BusID       "PCI:0:2:0"
EndSection

Does everything work?

If not, please test if manually change brightness level through sysfs
works:
# cd /sys/calss/backlight/intel_backlight
# echo xxx > brightness

And also test if hotkey event is sent out or not by running acpi_listen
and then press the hotkey.

Thanks,
Aaron

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 [off-list ref] wrote:

quoted

On 08/01/2013 04:07 PM, Borislav Petkov wrote:

quoted

On Wed, Jul 31, 2013 at 11:16:52PM +0200, Rafael J. Wysocki wrote:

quoted

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?

Thanks,
Aaron
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