the panel icon has the mute icon right?
i had this issue on my guest account, i just and a script delete ~/.pulse-cookie (root permission required)
this may be helpful to you, you will need to do some editing to it
Code:
~$ cat /usr/local/bin/xfce-login-script
#!/bin/bash
ogg123 /usr/share/sounds/ubuntu/stereo/desktop-login.ogg &
sleep 1
cd /tmp
if [ $(ls guest-* 2> /dev/null | wc -l) -gt 0 ];then
guest=$(ls | grep guest-)
rm ./$guest/.pulse-cookie
fi
exit
Code:
~$ cat /etc/lightdm/lightdm.conf
[SeatDefaults]
greeter-session=lightdm-gtk-greeter
user-session=xubuntu
display-setup-script=sh -c "numlockx on;if [ -f /var/log/xbacklight ];then xbacklight -set $(cat /var/log/xbacklight);fi"
greeter-setup-script=sh -c "ogg123 /usr/share/sounds/ubuntu/stereo/system-ready.ogg &"
session-setup-script=sh -c "/usr/local/bin/xfce-login-script &"
session-cleanup-script=sh -c "/usr/local/bin/xfce-logout-script;xbacklight -get > /var/log/xbacklight"
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