Re: Problems with USB AudioEngine Speakers [Bluetooth]

Ed Greshko <ed.greshko@xxxxxxxxxxx> · Wed, 13 Oct 2021 02:54:29 +0800



    On 13/10/2021 01:15, Jonathan Ryshpan
      wrote:

    
      On Sun, 2021-10-10 at 08:38 +0800, Ed Greshko wrote:
      
        On 10/10/2021 07:48, Jonathan
          Ryshpan wrote:
        
          
          On Sat, 2021-10-09 at 06:40 +0800, Ed Greshko wrote:
          
            What results do you get if you boot your system with
              the USB speakers disconnected and the connect them once
              the system is fully booted?
          
          I was listening to some audio when the sound stopped;
             AudioEngine had disappeared from the list of output
            devices.  A log extract is attached  (Audio-Crash.txt).  
          

          There may be a problem with the cable.  The speakers are
            attached to the computer with a USB extender cable, which
            may not give as good a connection as is needed.  So I moved
            things around and connected the speakers without the
            extender; we'll see if things get better.  A log extract is
            attached (Audio-Restore-ShortCable.txt).
        
         
          Oh, I never did have much luck with USB extender cables. 
          FWIW, I don't use USB devices all that much.  Other than

          dongles I only have an HDMI capture device hooked to USB.

          
          With speakers, I use Bluetooth.  I find them more versatile. 

        
      I have changed the connection to Bluetooth, which worked well
        for a while, except that sound quality may be a little less
        good.  However the connection is still flaky: 
      After
        plugging in another sound device via USB, Bluetooth disconnects
        from the speakers, producing the log message:
      Oct 10 08:14:28 amito bluetoothd[15557]:
        profiles/audio/avdtp.c:avdtp_connect_cb() connect to
        AC:A9:B4:00:06:2E: Connection refused (111)
      Does
        anyone know what this means?  The connection also drops fairly
        frequently for no apparent reason.  The only way to reconnect is
        to either remove and reinsert the Bluetooth adapter or to reboot
        the system.
      

      The
        Bluetooth adapter, an old Belkin USB dongle, produces this log
        message when recognized:
      Oct 09 22:01:10 amito udisksd[2157]: Mounted
        /dev/sr0 at /run/media/jonrysh/我的光碟 on behalf of uid 1000
      Definitely
        made in China.
      

      I would
        like to try a different adapter (dongle).  Can anyone recommend one?  There are a lot of choices, and
          the ones recommended (for M$ Windows) may not be the best for
          Linux.
    
    
    I have this one https://tinyurl.com/ykymt57u (bought here in Taiwan)
    and it works just fine.  Auto-connects when I power on

    my Sony speakers.  Never disconnects.  Before using the TP-Link I
    was using an adapter from Buffalo.  Forgot why I changed.

    
    I think any adapter with Cambridge
        Silicon Radio CSR8510 will
            work just fine.  

            
            The only thing I've found, info is more than a year old, is
            that not all V5.0 bluetooth adapters are

            supported in linux.

          
    --
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