Audio control behavior change with 5.1.24 (#16938)

[DdB]

Hi,

i am a long term VBox user, usually running plenty of VM's at the same time on debian-jessie.

Since the newest update, i am unable to control audio volume properly from the host. I used to see a slider for each VM in the "Advanced Volume Mixer" Extension in GNOME. But since the update, every VM (that has audio support) has 10 sliders after being booted. This is new and nasty, as the screen fills after less than 20 sliders and afterwards i can no longer handle the host applications volume sliders, nor access those of the VM's started as 3rd (or more). To disable audio for an entire VM is rarely an option. I'd prefer to not have all those superflous PulseAudio clients started in the first place. What can i do? (Apart from rolling back to 5.1.22, of course)

Host: jessie-64, vbox 5.1.24
Guests: many, most 64 bit, all with GA installed

[hotjava1231]

Do you perhaps have ICH AC97 selected as Audio Controller in your machine Audio settings? I do have it selected and I see multiple sink inputs and source outputs of VirtualBox origin in host OS. If I change Audio Controller to Intel HD Audio, then there will be one sink input and source output of VirtualBox.

Host OS is ARCH with 4.12.3-1 kernel. VirtualBox is 5.1.25 r117130 (Qt5.6.1).

Attached logs between VirtualBox VM 5.1.23 r116680 (this version doesn't have this problem) and VirtualBox VM 5.1.25 r117110 (this version have this problem)

[DdB]

If I change Audio Controller to Intel HD Audio, ...

Excellent hint, verified on debian and works there too.
Thanks

[DdB]

The problem https://www.virtualbox.org/ticket/16938 got fixed and will be in next release.