Thank you for taking the time to report this bug and helping to make
Ubuntu better. The issue you are reporting is an upstream one and it
would be nice if somebody having it could send the bug to the developers
of the software by following the instructions at
https://wiki.ubuntu.com/Bugs/Upstream/G
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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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1153173
Title:
The slider does not change the brightness
To manag
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: gnome-control-center (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1153173
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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https://bugs.l
