Cannot go beyond 100% sound level anymore in GNOME session

[Julian Andres Klode]

Since very recently, overamplification (going beyond 100%) is missing in sound settings, when running in GNOME session. In Ubuntu session, there is a switch to enable overamplification, but I don't know if it does anything.

The UI with a slider that went beyond 100% certainly worked better, and was available in gnome session too.

[Julian Andres Klode (juliank)]

Filed just in case this was an accident with the Ubuntu-specific toggle, and not an upstream design decision.

[Jeremy Bícha (jbicha)]

The over-amplification setting is an Ubuntu-specific patch. Although collaborated on with GNOME Design, it doesn't look like GNOME is interested in it at this time.

In order to try to keep the vanilla GNOME session close to upstream, Ubuntu's patch only affects the Ubuntu session.

(The slider does go past 100% in the Ubuntu session.)

The upstream tracker bug for this new feature contributed by Ubuntu to GNOME 3.28 (but not gnome-control-center in particular yet) is
https://bugzilla.gnome.org/show_bug.cgi?id=790988

[Jeremy Bícha (jbicha)]

There is a toggle switch in GNOME Tweaks but that toggle isn't exposed in Ubuntu because
1) It duplicates the functionality already in the GNOME Settings app on Ubuntu
2) The Ubuntu feature still uses a different gsettings key, in part because there are still patches for this feature that GNOME hasn't reviewed yet (for gnome-shell in particular).

[Sebastien Bacher (seb128)]

That's not a bug as explained, the GNOME session gives you the upstream experience which doesn't include that control in 3.28

[Julian Andres Klode (juliank)]

It also does work now in gnome 3.30 in disco, and I think in cosmic too, but I don't remember