windows 7 - Why/how does switching devices "invalidate" the Bluetooth connection?

07
2014-07
  • Evgeni

    Sorry if the title is confusing, couldn't really come up with a more descriptive one.

    So I have a soundbar (Samsung HW-F450) with Bluetooth. I can and I do connect to it from my laptop to listen to music, which works as expected (=fine) the first time. If I disconnect from the soundbar and connect later on again it works even better because my OS remembers the device (for some reason named AirTrack) and I therefore can skip the "search for new devices".

    But I ran into a confusing problem: if, at some point in the meantime, another device (laptop, smartphone) was connected to the soundbar the device-shortcut for the AirTrack that my OS saved for subsequent use gets invalidated and it cannot be used to connect to the AirTrack. The only solution then is to delete to device from the OS, search for it and re-connect this way. This even happens when connecting from the same laptop running different OSs (Ubuntu 14.04 and Windows 7, in my case).

    I am aware that there probably is no solution to my little problem because thats just the cookie crumbles but I wondered if anyone could shed some light on this wierd machanic. It almost appears that the two devices (my laptop and the soundbar) maintain some sort of common state which gets "out of sync" when a different device has used the soundbar. Is my vague assumption semi-correct?

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    Related Question

    windows 7 - Why can't I reconnect to my Philips SHB9000 bluetooth headset?
  • Thomas Eyde

    When I connected my Philips SHB9000 bluetooth to my Windows 7 (64 bit) for the very first time, it worked well. I had to manually change the default playback device, but otherwise it worked.

    Then, when I start up my computer from standby, it's nearly random when I can reconnect or not. My last option is to remove the bluetooth device and reconnect it. But now, even that doesn't work.

    The sad thing is, this used to work better on Windows 7 beta.

    Windows Update has a new driver which fails to install. Searching for this driver yields nothing. I thought all vendors had an official site for their drivers? Well, Philips seems to have none.

    If there is no answer to this problem, my advice is to NOT buy this headset. It's good looking, the sound is nice, but what need do we have from that if we can't use the bloody device?


    • Related Answers
  • Gerard

    I had similar issues with my SHB9000 and windows 7 x64 and though they seem resolved now that I installed the latest ASUS Bluetooth drivers, I did notice some interesting things;

    1) The ACER bluetooth drivers did install, but messed up everything. All the devices exposed by the headset were there all the time, even when the headset was off, and the sound defaulted to it all the time even if it was nowhere near the laptop. The drivers installed fine though, no conflicts.

    2) The ASUS drivers, specific for the BT-253 chipset, worked fine, even though the ACER ones claimed to be a newer version (I had to manually uninstall both the software and all drivers).

    3) Most importantly, while experimenting, I noticed that the headphones switch from the proper stereo protocol (A2DP) to the crappy wireless headset one (the mono sound, whatever the name is) whenever I activated the microphone in some way or another. Currently, the headset is present as both a playback and recording device in the audio settings, whenever it is turned on. The recording device is the default recording device when the headset is turned on. As soon as I turn on ANYTHING that captures microphone input (even the "Recording" tab in the "Sound" settings), it switches to mono sound in order to enable microphone input. If I DISABLE the wireless microphone, or switch the default to the built-in microphone, it goes back to proper stereo sound.

    In short; if you're experiencing this, try disabling the wireless microphone in the sound settings, or set the default one to another microphone. As long as the microphone on the headset is not in use, it will use A2DP and the sound quality is fine.

  • Seasoned Advice (cooking)

    I had the same problem, I have a sony vaio computer which only comes with the standard Microsoft drivers. I installed this one ->

    http://support.gateway.com/support/drivers/getFile.asp?id=23452&dscr=Broadcom%20BRM2045%20and%20BRM2046%20Bluetoot%20h%20Driver%20Version%206.2.1.500&uid=24766478

    reinstalled the shb9000 again, and worked