I was advised to give the output of the following command: sudo fuser -v /dev/dsp* /dev/snd/* /dev/audio* /dev/mixer* /dev/seq*
The output is: USER PID ACCESS COMMAND /dev/snd/controlC0: alexander 3797 F.... knotify4 alexander 3816 F.... kmix -- "an audio device is active 100.0% procent of the time" in KDE according to powertop https://bugs.launchpad.net/bugs/521424 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs