This is caused by the hal daemon not allowing you to access the device because of a security policy. The hal daemons security policy resides in a file at “/etc/dbus-1/system.d/hal.conf”.
your hal.conf should look like this
<!DOCTYPE busconfig PUBLIC
"-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
"http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
<!-- This configuration file specifies the required security policies
for the HAL to work. -->
<!-- Only root or user haldaemon can own the HAL service -->
<policy user="haldaemon">
<allow own="org.freedesktop.Hal"/>
</policy>
<policy user="root">
<allow own="org.freedesktop.Hal"/>
</policy>
<!-- Allow anyone to invoke methods on the Manager and Device interfaces -->
<policy context="default">
<allow send_interface="org.freedesktop.Hal.Manager"/>
<allow send_interface="org.freedesktop.Hal.Device"/>
<allow receive_interface="org.freedesktop.Hal.Manager"
receive_sender="org.freedesktop.Hal"/>
<allow receive_interface="org.freedesktop.Hal.Device"
receive_sender="org.freedesktop.Hal"/>
<allow send_interface="org.freedesktop.Hal.Device.SystemP owerManagement"/>
<allow send_interface="org.freedesktop.Hal.Device.LaptopP anel"/>
<allow send_interface="org.freedesktop.Hal.Device.Volume"/>
<allow send_interface="org.freedesktop.Hal.Device.Volume. Crypto"/>
<allow receive_interface="org.freedesktop.Hal.Device.Syst emPowerManagement"
receive_sender="org.freedesktop.Hal"/>
<allow receive_interface="org.freedesktop.Hal.Device.Lapt opPanel"
receive_sender="org.freedesktop.Hal"/>
<allow receive_interface="org.freedesktop.Hal.Device.Volu me"
receive_sender="org.freedesktop.Hal"/>
<allow receive_interface="org.freedesktop.Hal.Device.Volu me.Crypto"
receive_sender="org.freedesktop.Hal"/>
</policy>
<!-- Default policy for the exported interfaces -->
<policy context="default">
<deny send_interface="org.freedesktop.Hal.Device.SystemP owerManagement"/>
<deny send_interface="org.freedesktop.Hal.Device.VideoAd apterPM"/>
<deny send_interface="org.freedesktop.Hal.Device.LaptopP anel"/>
<deny send_interface="org.freedesktop.Hal.Device.Volume"/>
<deny send_interface="org.freedesktop.Hal.Device.Volume. Crypto"/>
</policy>
<!-- This will not work if pam_console support is not enabled -->
<!-- This build (from SlackBuilds.org) does not include pam_console support -->
<policy at_console="true">
<allow send_interface="org.freedesktop.Hal.Device.SystemP owerManagement"/>
<allow send_interface="org.freedesktop.Hal.Device.LaptopP anel"/>
<allow send_interface="org.freedesktop.Hal.Device.Volume"/>
<allow send_interface="org.freedesktop.Hal.Device.Volume. Crypto"/>
</policy>
<!-- Allow members of 'power' group to shutdown/restart/suspend/hibernate -->
<policy group="power">
<allow send_interface="org.freedesktop.Hal.Device.SystemP owerManagement"/>
</policy>
<!-- Allow members of 'video' group to manipulate video settings -->
<policy group="video">
<allow send_interface="org.freedesktop.Hal.Device.VideoAd apterPM"/>
<allow send_interface="org.freedesktop.Hal.Device.LaptopP anel"/>
</policy>
<!-- Allow members of the 'plugdev' group to mount volumes -->
<policy group="plugdev">
<allow send_interface="org.freedesktop.Hal.Device.Volume"/>
<allow send_interface="org.freedesktop.Hal.Device.Volume. Crypto"/>
</policy>
</busconfig>
restart using
/etc/init.d/haldaemon restart



