[Bug 29410] hald fails to listen for dbus connections while executing callouts

[Phillip Susi]

Public bug reported:
https://launchpad.net/malone/bugs/29410

Affects: hal (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
I used an fdi policy to direct hald to invoke a callout script when it
detects cdrw drives.  When the script runs it tries to add some
properties to the device by calling hal-set-property.  These calls fail
and hal-set-property prints:

error: libhal_ctx_init: (null): (null)

If I fork a background pipeline that sleeps for 2 seconds, then calls
hal-set-property then the property is correctly added, but I need
another fdi policy to match on this property, so it must be added before
the object is completely processed ( before the callout returns ).