I've also seen the following errors when running hp-systray from the
command line:
ERROR:dbus.proxies:Introspect error on :1.23:/com/hplip/StatusService:
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoReply: Did
not receive a reply. Possible causes include: the remote application did
not send a reply, the message bus security policy blocked the reply, the
reply timeout expired, or the network connection was broken.
error: Unable to communicate with device (code=12):
hp:/usb/Officejet_Pro_K5300?serial=MY742380S7
warning: Device not found
error: Unable to communicate with device (code=12):
hp:/usb/Officejet_Pro_K5300?serial=MY742380S7
warning: Device not found
Arthur.
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