echo 'HandleLidSwitch=hibernate' >> /etc/systemd/logind.conf
# Set up sound.
-usermod -G audio plom
+usermod -aG audio plom
apt-get -y install alsa-utils
amixer -c 0 sset Master playback 100% unmute
apt-get -y install xserver-xorg xinit xterm i3 i3status dmenu
# Set up OpenGL and hardware acceleration.
-apt-get -y libgl1-mesa-dri
-apt-get -y i965-va-driver
+apt-get -y install libgl1-mesa-dri
+apt-get -y install i965-va-driver
+usermod -G video plom
# Install xrandr.
apt-get -y install x11-xserver-utils