[Bug 42886] Re: ibm-acpi volume control unpredictable

[Paul Sladen]

*** This bug is a duplicate of bug 39098 ***

Martin: Okay, I think what you're highlighting is this:

  Mute => hardware mute-set regardless
  VolumeDown/VolumeUp => Unmute

and this is [almost] the same as 'gnome-settings-daemon', which takes
the first movement (Up or Down) after a mute as also meaning Unmute;
however it differs in that a Mute event while muted makes 'g-s-d' Unmute
aswell.

So;  if the hardware mute is already active, then the VolumeUp is sent,
immediately followed by Mute in order to maintain the status-quo, keep
the software-mixer matching the hardware mixer and cause the status
dialogue (the volume bar) to be shown.

In the case above, it does not matter whether up or down is sent, as the
first up or down after a mute causes Unmute, both in GNOME and in the
hardware mixer.

-- 
ibm-acpi volume control unpredictable
https://launchpad.net/bugs/42886