It's most likely the issue with icon-theme issue. For me it turns red or blue depending or icon-theme. See https://i.imgur.com/zWYqIrl.png
** Also affects: ubuntu-themes (Ubuntu) Importance: Undecided Status: New ** Changed in: indicator-sound (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ubuntu-themes in Ubuntu. https://bugs.launchpad.net/bugs/1738034 Title: Muted Sound Indicator randomly remains red when no sound is playing Status in indicator-sound package in Ubuntu: Invalid Status in ubuntu-themes package in Ubuntu: New Bug description: Steps to reproduce: 1. Mute the main Ubuntu volume 2. Play some short sound Expected behavior: Obviously you won't hear the sound. While the sound plays, the indicator should become red; then, when the sound is done playing and nothing else is playing, either immediately or after a very short period (e.g. a couple of seconds), the indicator should go back to its normal color. Observed behavior: Sometimes it behaves as expected, but sometimes it will remain red forever, until you unmute it. It's utterly random. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: indicator-sound 12.10.2+16.04.20160406-0ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-101.124-generic 4.4.95 Uname: Linux 4.4.0-101-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia ApportVersion: 2.20.1-0ubuntu2.13 Architecture: amd64 CurrentDesktop: Unity Date: Wed Dec 13 17:09:25 2017 InstallationDate: Installed on 2013-10-11 (1523 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) SourcePackage: indicator-sound UpgradeStatus: No upgrade log present (probably fresh install) upstart.indicator-sound.log: (process:2339): indicator-sound-WARNING **: accounts-service-access.vala:218: unable to sync volume 0,608643 to AccountsService: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: No such interface 'com.ubuntu.AccountsService.Sound' (process:2339): indicator-sound-WARNING **: accounts-service-access.vala:218: unable to sync volume 0,848633 to AccountsService: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: No such interface 'com.ubuntu.AccountsService.Sound' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/indicator-sound/+bug/1738034/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp