Comment 61 for bug 1257766

I tried the fix reported by #58 but it didn't work. Before that Fn LumUp/Down displayed the brightness control overlay. After that it didn't show it anymore. I restored the original boot configuration and it appears again. Unfortunately Shutdown behaves like Restart now. I remember I had the same problem when I installed the ZBook but it went away after I installed KUbuntu (but I went back to Gnome session fallback later on.)

$ lsb_release -a
LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch
Distributor ID: Ubuntu
Description: Ubuntu 12.04.5 LTS
Release: 12.04
Codename: precise

$ uname -a
Linux *** 3.13.0-48-generic #80~precise1-Ubuntu SMP Thu Mar 12 19:30:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux