add pulseaudio service

Signed-off-by: surenyi <surenyi82@163.com>

tex/ubuntu.tex

@@ -155,6 +155,32 @@ TimedLoginEnable=true
 TimedLogin=ubuntu
 TimedLoginDelay=10
 \end{minted}
+\item 设置 pulseaudio 音频服务 (可选):
+添加文件 \texttt{/etc/systemd/system/pulseaudio.service}:
+\begin{minted}[bgcolor=lightgray!30,fontsize=\scriptsize]{ini}
+[Unit]
+Description=PulseAudio system server
+# DO NOT ADD ConditionUser=!root
+
+[Service]
+Type=notify
+ExecStart=pulseaudio --daemonize=no --system --realtime --log-target=journal
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target
+\end{minted}
+然后执行命令：
+\begin{minted}[bgcolor=lightgray!30,fontsize=\scriptsize]{ini}
+systemctl --system enable --now pulseaudio.service
+\end{minted}
+添加以下内容到 \texttt{/etc/pulse/client.conf}文件中：
+\begin{minted}[bgcolor=lightgray!30,fontsize=\scriptsize]{ini}
+default-server = /var/run/pulse/native
+autospawn = no
+\end{minted}
+将用户添加到 \texttt{pulse-access}组中。
+
 \item 设置网络参数/etc/network/interfaces.d/eth0
 \begin{minted}[bgcolor=lightgray!30,fontsize=\scriptsize]{ini}
 auto eth0