System sound volume gets reduced when screen lock is activated

[Jens Berke]

1) The release of Ubuntu you are using

Ubuntu 14.04 LTS

2) The version of the package you are using

light-locker 1.4.0-0ubuntu1

3) What you expected to happen

Locking the screen should have no impact on the sound volume of the system.

4) What happened instead

Light-Locker sets the sound volume of the system to about 50% to 60% of the maximal sound volume when screen locking is activated.

The bug depends on the setting "Automatically lock screen" in the Light Locker Settings. If it's set to "never" the bug doesn't occur. Set the following values to reproduce it:

Blank screen after: 1 minute
Enable light-locker: on
Automatically lock screen: when the screensaver is activated
Delay locking after screensaver for: 10 seconds

Then play music or something else that uses sound and set the sound volume of the system to maximum. Wait for Light-Locker to blank the screen. The screen gets locked and the sound volume of the system is set as described above after the amount of seconds in "Delay locking after screensaver for" have passed.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: light-locker 1.4.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CurrentDesktop: XFCE
Date: Sun Apr 20 11:14:10 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-03-08 (42 days ago)
InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016)
SourcePackage: light-locker
UpgradeStatus: Upgraded to trusty on 2014-04-17 (2 days ago)

[Jens Berke (jensberke)]

Additional information: after a reboot, without changing anything in the setup, the problem is gone. Seems like there is an unknown step which "activated" the problem in the first place.

[Simon Steinbeiß (ochosi)]

Hi Jens,
I've never seen this problem before and can't really imagine how it would be related to light-locker. I'm marking this as invalid, feel free to reopen the bugreport if the problem re-occurs in a reproducible manner.

[gdi2k (gdi2k)]

I have the same issue - in my case it is not reduced, but completely muted, not just reduced. I have restarted a number of times, seems to make no difference.

This is a fresh install of Xubuntu 14.04 LTS.

[Jérôme (jerome-bouat)]

The bug appears for me.

After a delay, when light-locker is enabled, the sound is muted until I unlock my session.

Is there any settings which provides the same behaviour than xscreensaver ?

[Yuri Ribeiro Sucupira (yuri-sucupira)]

Old topic, old bug: I have the same issue.

When the screen is locked, the volume changes to about 50%. I left my Dell notebook playing music (YouTube musical flash videos in a playlist), but when Light Locker automatically started the volume was reduced from 100% to 50%.

uname -a: Linux yurix 3.19.0-32-generic #37~14.04.1-Ubuntu SMP Thu Oct 22 09:41:40 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Distro: 64-bit GNU/Linux XUbuntu 14.04

Device: notebook Dell Inspiron 5548 (0643), Intel CPU i7 5500U@2.4GHz & 16GB RAM @1600MHz

Light Locker version: 1.4.0-0ubuntu1
Light Locker Settings version: 1.2.1-0ubuntu1.1

The command "lsmod |grep sound" tells me that the "soundcore" is in use and being used by kernel modules "snd" and "snd_hda_codec".

My GPU is an AMD Radeon R7 M260 @ 2GB RAM/900MHz clock. The command "lsmod |grep fglrx" (fglrx is the proprietary device driver for AMD GPUs) tells me that the modules "fglrx" and "amd_iommu_v2" are being used by the OS.

After I disabled Light Locker, the problem didn't happen anymore. Now I'm using only Xscreensaver.

[David C. (th3davis)]

Hi there,

I have exactly the same issue. Also, when I mute the sound in my user session and I lock the session, the sound goes unmuted and around the 60% level.

In my case, the sound levels mod it's instantly, no delay after session lock.

Any idea will be appreciated :)

Info:
Distro: 64-bit GNU/Linux XUbuntu 14.04
$ uname -a
Linux xxxxx 3.19.0-42-generic #48~14.04.1-Ubuntu SMP Fri Dec 18 10:24:49 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux