PS2. Disabling 'Use audio device' removes the user from audio group. And since /dev/dsp is acl controlled, access to it is granted to the user which currently uses the display. I guess that the ACL magic is done by policykit/udev - but i'm not sure though.
So, to enable sound switching with user switching, just remove your users from audio group.
PS2. Disabling 'Use audio device' removes the user from audio group. And since /dev/dsp is acl controlled, access to it is granted to the user which currently uses the display. I guess that the ACL magic is done by policykit/udev - but i'm not sure though.
So, to enable sound switching with user switching, just remove your users from audio group.