gnome-volume-control: output volume slider only moves downward when using mouse wheel

[Mario Vukelic]

Binary package hint: gnome-media

1. Go to menu System -> Preferences -> Sound (same if you use sound indicator -> Preferences)
2. Hover mouse pointer on "Output volume" slider
3. Rotate mouse wheel
Result: regardless of mouse wheel direction, the slider always moves downward (lower volume)

Expected: rotating mouse wheel forward (away from me) increases volume, backward (toward me) reduces volume. This is the behavior of the slider directly in the sound indicator menu, and also of the sound indicator itself when you just hover on it without opening the menu.

In case it matters, I use a Logitech Cordless TrackMan on an Apple MacBook Pro 5.3, the trackpad scrolling of which shows the same issue.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: gnome-media 2.32.0-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
Uname: Linux 2.6.38-5-generic x86_64
NonfreeKernelModules: wl
Architecture: amd64
Date: Fri Feb 25 19:17:59 2011
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100131)
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=de_DE.utf8
 LC_MESSAGES=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-media

[Mario Vukelic (kreuzsakra)]

Compare LP#725167 for another slider direction issue - seems there is inconsistency in Ubuntu about wheel directions for sliders.

[Mario Vukelic (kreuzsakra)]

I realized there seems to be a wider issue and created LP#725177

[Mario Vukelic (kreuzsakra)]

Back to the issue of "preference window's output volume slider only moves downward": it does move correctly when the preferences window is open and I turn the wheel while hovering the mouse over the sound indicator's menu.