I was having an almost identical error when plugging a usb key, and
finally did found that dbus policy was saying both one thing and then
the opposite, commenting out the opposite fixed it for me:
More precisely in /etc/dbus-1/system.d/hal.conf it says:
<!-- Allow anyone to invoke methods on the Manager and Device interfaces -->
<policy context="default">
...
<allow send_interface="org.freedesktop.Hal.Device.Volume"/>
and later:
<!-- Default policy for the exported interfaces -->
<policy context="default">
<deny send_interface="org.freedesktop.Hal.Device.SystemPowerManagement"/>
<deny send_interface="org.freedesktop.Hal.Device.VideoAdapterPM"/>
<deny send_interface="org.freedesktop.Hal.Device.LaptopPanel"/>
<deny send_interface="org.freedesktop.Hal.Device.Volume"/>
<deny send_interface="org.freedesktop.Hal.Device.Volume.Crypto"/>
</policy>
that I edited to become:
<!-- Default policy for the exported interfaces -->
<policy context="default">
<deny send_interface="org.freedesktop.Hal.Device.SystemPowerManagement"/>
<deny send_interface="org.freedesktop.Hal.Device.VideoAdapterPM"/>
<deny send_interface="org.freedesktop.Hal.Device.LaptopPanel"/>
<!-- deny send_interface="org.freedesktop.Hal.Device.Volume"/ -->
<!-- deny send_interface="org.freedesktop.Hal.Device.Volume.Crypto"/ -->
</policy>
So I just commented out the last two deny lines (note the -- at the end
too! )
** Changed in: dbus (Ubuntu)
Status: New => Confirmed
--
dbus.error.accessdenied
https://bugs.launchpad.net/bugs/235134
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