[Bug 311716] Re: The slider brightness Applet has value inverted after the last update (2.6.27-11)

[bve]

The Fn-keys don't work for me on a Lenovo X300 with linux-
image-2.6.27-11-generic (intrepid). Changing throuhg guidance-power-
manager in kde4 works, though. I realized that pressing the Fn-keys for
brightness up and down changes the value of
/proc/acpi/video/VID/LCD0/brightness instead of
/proc/acpi/video/VID1/LCD0/brightness (VID instead of VID1). Manually
changing the latter (echo 80 > /proc/acpi/video/VID1/LCD0/brightness)
does change the brightness. This is also reported for arch linux (see
http://wiki.archlinux.org/index.php/Lenovo_Thinkpad_X300#Backlight) so
it might not  be ubuntu-specific.

I have in /etc/modprobe.d/options 
options thinkpad_acpi experimental=1 fan_control=1 brightness_enable=1

and tried withouth all these options, and with 
options video acpi_backlight=vendor

always same behaviour. I also tried with a new kernel with 
# CONFIG_THINKPAD_ACPI_VIDEO is not set 
(read somewhere, that that could help, but it didn't). 

I just installed ubuntu intrepid on that notebook, so I can't say, under
which constellation exactly it worked, but I remember, that the keys
worked when I first installed intrepid from the CD, before updating. But
it didn't work with the 2.6.27-7-kernel, which I tried to boot as well.

Should I open a new bug for that?

Ben

-- 
The slider brightness Applet has value inverted after the last update (2.6.27-11)
https://bugs.launchpad.net/bugs/311716
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