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[Bug 1458933] Re: No volume control on screen lock - Volume goes to 100%

 

1. Remove your account from audio group. Commands:
> group
Check for "audio" group. If you see it:
> sudo deluser your_user_name audio
Removes "your_user_name" user from "audio" group. You need to logout/reboot.

It is very rare to need to have your user in audio group.
https://wiki.ubuntu.com/Audio/TheAudioGroup

2. Alternative. You can install "indicator-sound" package to sound indicator at login screen.
Open /etc/lightdm/lightdm-gtk-greeter.conf and edit "indicators" or "show-indicators" option: add "sound" to it.
indicators=list;of;indicators;on;login;screen;sound
This indicator saves its state between sessions and reboots. But it <can> affect your session settings.

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greeter in Ubuntu.
https://bugs.launchpad.net/bugs/1458933

Title:
  No volume control on screen lock - Volume goes to 100%

Status in lightdm-gtk-greeter package in Ubuntu:
  New

Bug description:
  Xubuntu 14.04.2, LightDM, Macbook 4,1, using ubuntu-stable

  using $ dm-tool lock, the keyboard volume controls do not work until I
  have logged in. I expect it to at least maintain the volume level it
  was at, and respond to being muted, but it does none of these things.
  This is a problem because if I forget to turn off music, then take my
  laptop somewhere, I have to login before I can mute the massive blast
  of music coming out of my speakers. On the lock screen, even if the
  volume was previously muted, it gets put to 100%. Searching google and
  posting this problem on /r/linux4noobs, /r/linuxquestions, and
  /r/archlinux have yielded no answers.

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