port-macppc/52954: snapper(4) - audio feedback caused by microphone being always on

[venture37%geeklan.co.uk@localhost]

>Number:         52954
>Category:       port-macppc
>Synopsis:       snapper(4) - audio feedback caused by microphone being always on
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-macppc-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jan 27 16:45:00 +0000 2018
>Originator:     Sevan Janiyan
>Release:        8.0_BETA & -current
>Organization:
>Environment:
NetBSD 8.99.12 macppc
>Description:
Following on from port-macppc/52949, the microphone on systems with snapper(4) devices appears to be always on, this cause problems with audio feedback, especially once the volume is raised being a certain level using F5 key (hotkey for volume up) on keyboard.

Reproduced issue on 15" & 12" PowerBooks.
>How-To-Repeat:
Press F5 several times to raise volume or place hand over microphone.
On a 12" PowerBook the microphone has a hole above the F1 key on the keyboard.

On a 15" PowerBook rest the palm of your hand on the left hand speaker & gently pushing down.
>Fix: