This is due to the container running udevadm trigger --action=add.
Those events also get sent to the host, causing some hardware to be
reset. For me, in addition to sound levels being reset, my keyboard
bindings are also reset.
This won't happen with a Precise guest as it won't run udev. At the
next UDS we intend to discuss a design for a devices namespace to avoid
this.
** Changed in: lxc (Ubuntu)
Status: New => Confirmed
** Changed in: lxc (Ubuntu)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/948447
Title:
Starting an LXC changes the volume (sound!) of the host
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