Brightness Keys Dont Do Anything

[Xisdibik]

This is for Kubuntu, I didnt see a choice for it on the list of distrobutions.

in Ubuntu 9.04 the Brightness keys work perfectly changing the brightness on my Samsung NC10 Netbook
in Kubuntu 9.04 the brightness keys do not change the brightness at all.

[Dan Trevino (dantrevino)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. You reported this bug a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue for you. Can you try with the latest Ubuntu release? Thanks in advance.

[franz007 (franz007)]

I can confirm the exact same symthoms in the latest Kubuntu lucy alpha (including updates), the brighness keys work correct in Ubuntu (lucid) but do nothing in Kubuntu.

With xbacklight I can change the backlight.

[franz007 (franz007)]

I just discovered that changing the backlight with
echo 100 > /proc/acpi/video/GFX0/DD04/brightness
does also work

[papukaija (papukaija)]

The minimum required BIOS version is 11Ca because "brightness controls require BIOS 11CA due to the new graphics system. " as seen at https://help.ubuntu.com/community/NC10#Karmic%209.10 Please note that the issue about completely enabling/disabling baclight (eg screen on/off) with Fn-F5 button is tracked at bug 296489.

[papukaija (papukaija)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 540333, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.