Using F11 as a shortcut for volume randomly activates full screen

[Scott Kostyshak]

To reproduce, run the following:

gsettings set org.gnome.settings-daemon.plugins.media-keys volume-down 'F11'

and then open an application that supports toggling fullscreen with F11 (or I imagine has any kind of shortcut for F11).
First press F11 singularly a few times and note that the volume decreases. This is what I expected.
Now hold F11. The volume decreases sometimes and other times the fullscreen is toggled back and forth. It seems that some of the F11 presses are not being picked up on the system level.

I've reproduced this on Ubuntu 14.04 on three separate machines (although they all have very similar setups).

$ lsb_release -rd
Description: Ubuntu 14.04.1 LTS
Release: 14.04

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: gnome-settings-daemon 3.8.6.1-0ubuntu11.2
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Aug 21 21:52:00 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-07-16 (36 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: gnome-settings-daemon
UpgradeStatus: No upgrade log present (probably fresh install)

[Scott Kostyshak (scott-kostyshak)]

I wonder if this is at all related to #1244090.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.