My device is definitely in sleep mode.
This code indicates its possible. None of the channels in the binding work for my device as the binding stands.
Running netdisco, I can see the device:
openhome:
[{'host': '192.168.0.64',
'manufacturer': 'Linn Products Ltd',
'model_name': 'Klimax DS',
'model_number': None,
'name': 'Linn Music Room Preamp',
'port': 55178,
'serial': None,
'ssdp_description': 'http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860133/Upnp/device.xml',
'udn': 'uuid:4c494e4e-0026-0f22-3898-012366860133',
'upnp_device_type': 'urn:linn-co-uk:device:Preamp:1'},
{'host': '192.168.0.64',
'manufacturer': 'Linn Products Ltd',
'model_name': 'Klimax DS',
'model_number': None,
'name': 'Linn Music Room',
'port': 55178,
'serial': None,
'ssdp_description': 'http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml',
'udn': 'uuid:4c494e4e-0026-0f22-3898-01236686013f',
'upnp_device_type': 'urn:linn-co-uk:device:Source:1'}]
And
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860133/Upnp/device.xml - upnp:rootdevice>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860133/Upnp/device.xml - uuid:4c494e4e-0026-0f22-3898-012366860133>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860133/Upnp/device.xml - urn:linn-co-uk:device:Preamp:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860133/Upnp/device.xml - urn:av-openhome-org:service:Product:3>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860133/Upnp/device.xml - urn:av-openhome-org:service:Config:2>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860133/Upnp/device.xml - urn:linn-co-uk:service:Proxy:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860133/Upnp/device.xml - urn:av-openhome-org:service:Volume:4>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - upnp:rootdevice>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - uuid:4c494e4e-0026-0f22-3898-01236686013f>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:linn-co-uk:device:Source:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:ConfigApp:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Product:3>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Credentials:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Time:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Info:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Config:2>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Transport:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Pins:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:linn-co-uk:service:Diagnostics:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:linn-co-uk:service:Volkano:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:linn-co-uk:service:Privacy:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Exakt:4>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:linn-co-uk:service:Configuration:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:linn-co-uk:service:Exakt2:2>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:linn-co-uk:service:ExaktInputs:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:linn-co-uk:service:Cloud:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Playlist:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Radio:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Receiver:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Sender:2>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-01236686013f/Upnp/device.xml - urn:av-openhome-org:service:Debug:2>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860171/Upnp/device.xml - upnp:rootdevice>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860171/Upnp/device.xml - uuid:4c494e4e-0026-0f22-3898-012366860171>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860171/Upnp/device.xml - urn:schemas-upnp-org:device:MediaRenderer:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860171/Upnp/device.xml - urn:schemas-upnp-org:service:AVTransport:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860171/Upnp/device.xml - urn:schemas-upnp-org:service:ConnectionManager:1>,
<UPNPEntry http://192.168.0.64:55178/4c494e4e-0026-0f22-3898-012366860171/Upnp/device.xml - urn:schemas-upnp-org:service:RenderingControl:1>,