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. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1310220 Title: System sound volume gets reduced when screen lock is activated To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1310220/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
