Kubuntu 24.04.1vs bluetooth

[Stephen Partington]

I have found that numerous bluetooth sound devices treat each connection
type as a separate device when connected to a computer. Do you have more
than one listed?

On Sat, Jan 11, 2025 at 11:33 PM Jim via PLUG-discuss <
plug-discuss at lists.phxlinux.org> wrote:

> Bluetooth and my Kubuntu 24.04.1 installation don't seem to get along.
> I have one of those bluetooth stereo speaker boxes that I use with the
> system sometimes.  It can be used as a speaker that works with a phone,
> or with the computer or phone.   The problem is that when I boot the
> machine and try to connect to those speakers, it connects using one of
> the codecs that's meant to be used with a phone.  In that mode, the
> sound is mono and sounds like it's being played back over a phone.
> Obviously not desirable for listening to music.  When I open
> blueman-manager, the following audio profiles are available:
>
> off
> headset head unit (HSP/HFP)
> Headset Head Unit (HSP/HFP, codec CVSD)
> Headset Head Unit (HSP/HFP, codec mSBC)
>
> After I go through the procedure I've worked out, it connects in high
> fidelity mode with the following options available under audio profile
> in blueman-manager.  The X is next to the one it's using.
>
>    off
>    headset head unit (HSP/HFP)
>    High Fidelity Playback (A2DP Sink Codec SBC)
> X High Fidelity Playback (A2DP Sink Codec SBC SBC-XQ)
>    Headset Head Unit (HSP/HFP, codec CVSD)
>    Headset Head Unit (HSP/HFP, codec mSBC)
>
> Here's what I have to do to use the high fidelity mode.
>
> Unplug the bluetooth dongle
> Restart bluetooth
> Plug in dongle
> Launch blueman manager then search for speaker, then connect to it.
>
> The problem isn't limited to one bluetooth dongle or the speakers I
> have.  I've used other bluetooth dongles and other speakers but the
> problem still persists.
>
> Here's what hciconfig shows.
>
> hci0:   Type: Primary  Bus: USB
>          BD Address: 08:BE:AC:32:79:8D  ACL MTU: 1021:6  SCO MTU: 255:12
>          UP RUNNING
>          RX bytes:911592 acl:194 sco:0 events:128617 errors:0
>          TX bytes:65920621 acl:125374 sco:0 commands:3234 errors:0
>          Features: 0xff 0xff 0xff 0xfe 0xdb 0xfd 0x7b 0x87
>          Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
>          Link policy: RSWITCH HOLD SNIFF PARK
>          Link mode: PERIPHERAL ACCEPT
>          Name: 'ladmo'
>          Class: 0x7c0104
>          Service Classes: Rendering, Capturing, Object Transfer, Audio,
> Telephony
>          Device Class: Computer, Desktop workstation
>          HCI Version: 5.1 (0xa)  Revision: 0xdfc6
>          LMP Version: 5.1 (0xa)  Subversion: 0xd922
>          Manufacturer: Realtek Semiconductor Corporation (93)
>
> Is  there some way I can fix this.  If I can't get this fixed,
> eventually I'll get an FM transmitter good for covering the yard, plug
> it into the system and take a radio outside.
>
>
> Thanks to anyone that can help me get this fixed.
>
> Jim
>
>
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-- 
A mouse trap, placed on top of your alarm clock, will prevent you from
rolling over and going back to sleep after you hit the snooze button.

Stephen
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