How to solved or bypass this problem?
light-locker can hide my screen but very short time expose my screen contents when first switch to my screen by keyboard.
sound contents is always expose nearl like "normal" play.
$light-locker --version
light-locker 1.7.0
$pulseaudio --version
pulseaudio 10.0
#pulseaudio is run as non-root user
$sudo pgrep --uid 0 pulseaudio
$sudo pgrep --euid 0 pulseaudio
$cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 9 (stretch)"
NAME="Debian GNU/Linux"
VERSION_ID="9"
VERSION="9 (stretch)"
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"
$