Hi Chris, On 07/06/2015 11:38 AM, BARDEN Christopher (MM) wrote: Looks like someone forgot to mark the GetProperties method as ASYNC which might cause this. Try git commit 454b7e63e38b8df034a3c5e1d9b8562ca92ceb0b to see if it fixes this issue. The very first call to GetProperties triggers a +CNUM query to the driver. Once the query is performed, the results are cached and the reply is returned. All subsequent replies will be generated on the cached results. If you have multiple clients that are trying to utilize GetProperties during the initial query time, then all-but-one will receive an InProgress error. Here's the commit for reference: diff --git a/src/handsfree.c b/src/handsfree.c static const GDBusMethodTable handsfree_methods[] = { - { GDBUS_METHOD("GetProperties", + { GDBUS_ASYNC_METHOD("GetProperties", NULL, GDBUS_ARGS({ "properties", "a{sv}" }), handsfree_get_properties) }, { GDBUS_ASYNC_METHOD("SetProperty", Regards, -Denis