I am testing the Linus GIT development kernel. Currently, my kernel build is 3.18.0-rc5+. With this kernel, I get the following:
root@Wobbly:~# echo 938 > /sys/class/backlight/intel_backlight/brightness bash: echo: write error: Invalid argument root@Wobbly:~# echo 937 > /sys/class/backlight/intel_backlight/brightness As you can see, 937 is the highest value that does not give an error. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1392101 Title: Brightness controls not working on intel igfx To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392101/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs