Bionic "amplified" sound controls do not sync with volume slider

Bug #1817485 reported by Erick Brunzell on 2019-02-24
This bug affects 1 person
Affects Status Importance Assigned to Milestone
gnome-control-center (Ubuntu)

Bug Description

I'm just setting up my first Bionic HTPC and I notice that if you select allow-amplified-volume in dconf that change only applies to the volume slider, not to the sound control UI. This results in the volume hot-keys not controlling sound above 100%.

So if you're watching video content in full screen you must ESC, then use the volume slider, and then go back to full screen. It makes for an unwieldy process so using a different DE becomes a temptation.

You can see what I'm talking about in the attached screenshot.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-control-center 1:3.28.2-0ubuntu0.18.04.2
ProcVersionSignature: Ubuntu 4.15.0-45.48-generic 4.15.18
Uname: Linux 4.15.0-45-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: GNOME-Flashback:GNOME
Date: Sun Feb 24 14:10:03 2019
InstallationDate: Installed on 2018-01-28 (391 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
SourcePackage: gnome-control-center
UpgradeStatus: Upgraded to bionic on 2018-08-15 (193 days ago)

Erick Brunzell (lbsolost) wrote :
Sebastien Bacher (seb128) wrote :

Thank you for your bug report, why do you change it in dconf rather than using the settings control?

Changed in gnome-control-center (Ubuntu):
importance: Undecided → Low
Erick Brunzell (lbsolost) wrote :

Bionic no longer displays allow above 100% in the sound settings UI.

Sebastien Bacher (seb128) wrote :

What session do you use? Could you try under a standard Ubuntu session if that's an issue?

Sebastien Bacher (seb128) wrote :

In fact from the report info you use the fallback session, that setting is only available in the Ubuntu sesison by design (since it's not an UI upstream wanted and we respect their UI choice in !Ubuntu sessions)

Changed in gnome-control-center (Ubuntu):
status: New → Invalid
Erick Brunzell (lbsolost) wrote :

Actually this specific issue effects the default Ubuntu session as well. I did a fresh install of 18.04.2, installed updates, rebooted, and checked it out to be sure. Then I filed bug #1817625 so one or the other needs to be marked a duplicate (and changed back to "new" rather than "invalid"). I just wanted to collect all the logs so you could see I'm not pulling your leg about the default Ubuntu session being effected.

I had not realized that the default Ubuntu session had a UI for over-amplification whereas flashback session does not. Since it can be set via dconf I'm unlikely to file a new bug report just for that. I should however check to be sure flashback doesn't "break" things in a default session. I just got lazy yesterday and filed this bug report from my workhorse PC rather than using my friends new HTPC.

I'm going to rinse-n-repeat the steps to reproduce this in that unmolested install of Bionic. It seems that either a reboot or logout is needed after selecting over-amplification = on.

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