Create a file /etc/X11/xorg.conf.d/20-intel.conf with the following
content:
Section Device
Identifier HD 4000
Driver Intel
Option Backlight intel_backlight
EndSection
All works fine!
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Today I installed Elementary OS Luna 0.2 with 3.2 kernel - a slider
worked perfectly. Then I installed linux-image-generic-lts-raring (3.8
kernel) and xserver-xorg-lts-raring, then the slider stopped working.
Maybe the problem is xorg or video driver?
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In saucy this bug still persist (3.8 kernel) , but in precise it works
(3.2 kernel).
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Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu.
https://bugs.launchpad.net/bugs/1153173
Title:
The slider does
Public bug reported:
Can not turn on the horizontal scrolling in Mouse Touchpad Settings
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: gnome-control-center 1:3.6.3-0ubuntu18
ProcVersionSignature: Ubuntu 3.8.0-15.25-generic 3.8.4
Uname: Linux 3.8.0-15-generic i686
ApportVersion:
I learned that the gsd-backlight-helper is trying to change the
brightness in
/sys/devices/pci:00/:00:02.0/backlight/acpi_video0/brightness
but it does not work. I can change the brightness only by
/sys/class/backlight/intel_backlight/brightness.
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Apport log.
** Attachment added: Apport-log.txt
https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1153173/+attachment/3593713/+files/Apport-log.txt
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Public bug reported:
Hello.
I am tryed to use live cd Ubuntu 13.04 daily build on my eMachines E525 laptop.
When I open the Brightness and lock and try to change the brightness using
the slider, the brightness does not change.
I use the acpi_osi=Linux acpi_backlight=vendor options in
