Windows – A2DP bluetooth device on win7 develops massive latency after a couple hours

a2dpaudiobluetoothwindows

I have no idea what to pin this on, and I'm going a little nuts …

I have these A2DP speakers: http://www.amazon.com/Logitech-Wireless-USB-Speaker-Z515/dp/B003VAHYXW

they're great. I got a deal on them and they didn't come with the USB receiver, but I figured, hey, I have a cheap bluetooth dongle, no big deal.

They work fine (with a few ms of latency) right after being paired/installed, but after giving them a rest for a little while (i.e. waiting a couple hours without playing any audio, or letting the machine suspend, etc.) when I try to use them again, there's about 5-10 seconds of latency on the audio (this gets pretty ridiculous pretty quickly), and there's nothing I can do to fix this other than unpair, restart the machine, and re-pair. I've tried newer CSR drivers, I've tried restarting the Windows Audio and BT services; nothing fixes this apart from re-starting and re-pairing.

I have a suspicion that I just have a junky BT dongle, but I used to have an even junkier one that had issues with re-pairing a headset after I'd shut it off; this one has no problem with the headset, just massive A2DP latency. Are there entire tiers of "crappy bluetooth dongle" that I'm currently slowly climbing through, or am I missing some easy software solution?

Best Answer

well, confirmed I can fix it by turning the speaker off, re-plugging the dongle and then running:

net stop hfgservice
net start hfgservice
net stop audiosrv
net stop audioendpointbuilder
net start audioendpointbuilder
net start audiosrv

then turning the speaker back on. needless to say, this is a bit tedious (though having the BT dongle in a front USB port within arm's reach helps), and I ought to finally get a more expensive dongle so this isn't necessary.

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