my initial tests show that disbling the wacom plugin fixes the issue with hotkeys, volume keys, and even brightness keys (previously even the restart didn't fix brightness keys for me even though it fixed hotkeys and volume keys).
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1427877 Title: Media, brightness and volume keys don't work with GNOME 3.15.90 Status in Gnome Settings Daemon: Incomplete Status in GNOME Shell: Incomplete Status in Ubuntu GNOME: New Status in gnome-settings-daemon package in Ubuntu: Confirmed Bug description: After upgrading Ubuntu 15.04 Vivid to use GNOME 3.15.90 (by using gnome3-team/gnome3, gnome3-team/gnome3-staging ppas) media, brightness and volume keys from my laptop keyboard stop to work after working some time in a session or after suspending the computer. If I restart my computer media keys work again. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: gnome-settings-daemon 3.15.90-0ubuntu1~vivid1 [origin: LP-PPA-gnome3-team-gnome3-staging] ProcVersionSignature: Ubuntu 3.19.0-7.7-generic 3.19.0 Uname: Linux 3.19.0-7-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.16.2-0ubuntu1 Architecture: amd64 CurrentDesktop: GNOME Date: Tue Mar 3 23:07:33 2015 InstallationDate: Installed on 2014-10-22 (132 days ago) InstallationMedia: Ubuntu-GNOME 14.10 "Utopic Unicorn" - Alpha amd64 (20140923) SourcePackage: gnome-settings-daemon UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-settings-daemon/+bug/1427877/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp