I tried the command in the previous comment
dbus-send --system --print-reply --dest="org.freedesktop.Hal" /org/freedesktop/Hal/devices/computer org.freedesktop.Hal.Device.SystemPowerManagement.Suspend int32:0
The result was the same as running from the Gnome menu: failure to resume (as described in the bug description).
So I have changed the package to hal, on the advice of the previous comment's poster.
I tried the command in the previous comment
dbus-send --system --print-reply --dest= "org.freedeskto p.Hal" /org/freedeskto p/Hal/devices/ computer org.freedesktop .Hal.Device. SystemPowerMana gement. Suspend int32:0
The result was the same as running from the Gnome menu: failure to resume (as described in the bug description).
So I have changed the package to hal, on the advice of the previous comment's poster.