Workaround that seems to work (Ubuntu system with systemd and pulseaudio) Create this file "~/.config/systemd/user/pulseaudio.preconf.service" with this content
[Unit] Description=Sound Service PreConf ConditionUser=!root [Service] Type=oneshot ExecStart=amixer set "Channel mode" "6ch" [Install] WantedBy=pulseaudio.service systemctl --user enable pulseaudio.preconf.service and restart This mixer setting should be persistent automatically across reboots. And for pulseaudio integration, it should be able to configure this setting in the GUI ** Also affects: pulseaudio (Ubuntu) Importance: Undecided Status: New ** Changed in: alsa-driver (Ubuntu) Status: Expired => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1505584 Title: [Realtek ALC887-VD] Playback only through 2 channels by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1505584/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs