I also have Intel graphics in a HP laptop
This fix also works in 14.04:
http://askubuntu.com/questions/362894/changing-the-brightness-stopped-working-in-13-10-saucy-salamander
If you're using intel video card do:
sudo gedit /usr/share/X11/xorg.conf.d/20-intel.conf
Add the following in the empty
Bu still exists in 14.04 64-bit
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https://bugs.launchpad.net/bugs/1255428
Title:
8086:0116 [Lenovo IdeaPad Z570] LCD brightness control keys and widget
do not work on Inte
The lid butto is recognized again and therefore the bug has been solved
in saucy, although it takes 2 times to revive the system.
Kernel: 3.11.0-12-generic x86_64
Output:
$ acpi_listen
button/lid C238 0080 0002
video C083 0080
thermal_zone TZ1 0081
thermal_zone T
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