Ubuntu
linux package

  1. Bug #1255428
  2. Comment #27

Comment 27 for bug 1255428

Revision history for this message
Shriramana Sharma (jamadagni) wrote : Re: 8086:0116 [Lenovo IdeaPad Z570] LCD brightness control keys and widget do not work on Intel Graphics on Saucy

Hello Christopher. I did the update just now and nothing has changed. Here's the output you asked for:

$ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
45CN38WW
10/21/2011

BTW as I already mentioned, I wonder if you are looking for the problem in the wrong place. I filed this bug against the kernel since I did not know where exactly else to file it and the hardware hotkey is not working.

But as I said, if I manually adjust the contents of /sys/class/backlight/intel_backlight/brightness the actual display brightness does change.

The problem is only that I am not able to change the brightness via the keyboard hotkey as well as the power applet.