I'm running Debian Jessie, with xfce4. Problem automount game-DVD.USB-Sticks and USB-HD's are mountet as expected. I use udisks2.lsusb | grep -i mediaBus 003 Device 003: ID 0e8d:1806 MediaTek Inc. Samsung SE-208 Slim Portable DVD Writer With a normal Video-DVD udevadm,udiskctl,gvfs-mountcat .config/xfce4/xfconf/xfce-perchannel-xml/thunar-volman.xml <?xml version=1.0 encoding=UTF-8?><channel name=thunar-volman version=1.0>  <property name=automount-media type=empty>    <property name=enabled type=bool value=true/>  </property>  <property name=automount-drives type=empty>    <property name=enabled type=bool value=true/>  </property>  <property name=autobrowse type=empty>    <property name=enabled type=bool value=false/>  </property>  <property name=autoopen type=empty>    <property name=enabled type=empty/>  </property>  <property name=autoplay-video-cds type=empty>    <property name=enabled type=bool value=true/>    <property name=command type=string value=/usr/bin/mpv -fs --alang=de dvdnav://menu/>  </property>  <property name=autoplay-audio-cds type=empty>    <property name=enabled type=bool value=true/>    <property name=command type=string value=/usr/bin/audacious -p cdda://sr0//>  </property></channel>No entry in /etc/fstab. No other packages installt like pmount or something else.  I ran in the same error for about 6 month and could solve it, with installing libblkid from stretch.What I try to solve it. install anew lbblkid from stretch higher version since for 6 monthtry differnet USB-Cablecontrol that dbus-launch thunar is in my autostartTry differnet DVD'sI use the DVD-Device rarely, so I don't know when the Problem came back.In apt-history I found a Kernel-upgrade and an upgrade for eject.I found out it is no Kernel-Problem or with systemd. Kernel from oldstable and boot with sysv-init doesn't help. Edit2 it is not a hardware-problem. Booting Live-session works proper.
thunar-volman automount and autoplay not longer working DVD/CD only
debian;automounting
Got him. Udev was to blame. I downgradet the relevant packages.Automount and autoplay is now working again. 