[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete = Expired
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https://bugs.launchpad.net/bugs/988202
I have the problem that when I change the screen brightness via the fn
keys or the system configuration panel, I get an increase in brightness
for maybe half a second and then it goes back to some default. Same for
key backlighting
My /sys/class/backlight folder has two dirs:
acpi_video0 and
The problem I reported seems to be related to lightum. I deinstalled lightum
via:
sudo apt-get remove lightum
restarted Ubuntu, and now I can change brightness level as usual using the
keyboard.
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Same Problem here with Macbook 6,1
One hint that might help to track down the problem.
On my System (12.04 LTS Final) the folder /sys/class/backlight is completely
empty. So i can't pass any Values to brightness Files.
When i try to create a directory inside /sys/class/backlight with mkdir, it
nohu_: Your machine is going to be significantly different, and more
than likely the problem is fundamentally different. You should file a
separate bug.
Here's a possible solution though: if your machine has nvidia graphics
and you're using the binary-only nvidia driver, try using the nouveau
sforshee and all others.
Removing nvidia-proprietary driver and switching to nouveau was the best advice
i could get. Didn't know the nouveau project so far and just turned on the
proprietary nvidia driver as usual after install. As I did for many years now ;)
Brightness Settings work, even by
Everything has its disadvantages. NVIDIA drivers cannot change
brightness, but rock in videogames, video rendering etc. Nouveau rocks
in composite desktop probably, can change brightness but cannot render
anything more complex (videogames).
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Please open a terminal and run 'ls /sys/class/backlight' and let me know
what directories are listed.
Then go into each of the directories in turn. Each will have a file
named brightness which will tell you the current brightness and
another named max_brightness which will tell you the maximum
** Changed in: linux (Ubuntu)
Importance: Undecided = Medium
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Title:
Ubuntu cannot automatically change brightness of screen and keyboard
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https://bugs.launchpad.net/bugs/988202
Title:
Ubuntu cannot automatically change brightness of screen and keyboard
backlight in Macbook Air 4,2
To manage notifications about this
apport information
** Tags added: apport-collected
** Description changed:
Hi, latest Ubuntu 12.04 cannot change brightness of screen and keyboard
backlight in macbook Air 4,2. OSX could. Please add this feature.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package:
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