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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1257766 Title: [HP ZBook 15] can not reduce brightness To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1257766/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
