** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1255428
Title:
LCD brightness control keys and widget do not work on Intel Graphics
on Saucy
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
After upgrading to Saucy, on my Lenovo IdeaPad Z570 with Intel HD
Graphics 3000, it is no longer possible to control the LCD brightness
using the hardware brightness control keys. Likewise for the KDE power
management settings or the battery icon on my Kubuntu Plasma tray. (I
don't use GNOME/Unity.) Until Raring I did not have this problem.
There is a workaround available from
http://askubuntu.com/questions/362894/changing-the-brightness-stopped-
working-in-13-10-saucy-salamander i.e. doing the following command on
a terminal:
echo 150 | sudo tee /sys/class/backlight/intel_backlight/brightness
where 150 is on the scale of 0 to whatever is given within
/sys/class/backlight/intel_backlight/max_brightness.
Based on this I wrote a GUI which however needs to be run using
sudo/kdesudo/gksudo. I have attached it.
Bug #1241745 also relates to the same problem on Saucy but apparently relates
to an NVidia driver and I was asked to track this as a separate bug
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1241745/comments/17
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ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
DistroRelease: Ubuntu 13.10
InstallationDate: Installed on 2013-10-19 (38 days ago)
InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64
(20131016.1)
MarkForUpload: True
Package: xserver-xorg-video-intel 2:2.99.904-0ubuntu2
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
Tags: saucy
Uname: Linux 3.11.0-13-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
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