Re: Unable to get Bluetooth to work on main with CSR5810

On Mon, 2 Mar 2026, Kevin Oberman wrote:

> For years I have been trying to get Bluetooth to work on my Lenovo T16
> AlderLake laptop.It came with a AX201 WiFi/Bluetooth interface and I was

That's the problem discussed lately here from?
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290639


> pleased when iBluetooth was supported, but didn't work, so I spent $7 on a
> CRS5810 which is claimed to work well on FreeBSD. Unfortunately, I still
> see the same problem so I now assume that the problem is me.
>
> When I insert the CSR I get:
> ubt1: <vendor 0x0a12 CSR8510 A10, class 224/1, rev 2.00/88.91, addr 4> on
> usbus1
>
> This is almost exactly what I see at boot on the AX201.  According to
> Handbook, I should see something like this:
>
> ubt0: vendor 0x0a12 product 0x0001, rev 1.10/5.25, addr 2
> ubt0: Interface 0 endpoints: interrupt=0x81, bulk-in=0x82, bulk-out=0x2
> ubt0: Interface 1 (alt.config 5) endpoints: isoc-in=0x83, isoc-out=0x3,
>      wMaxPacketSize=49, nframes=6, buffer size=294
>
> usbconfig shows:
> ugen1.4: <Bluetooth Dongle (HCI mode) Cambridge Silicon Radio, Ltd>
> at usbus1, cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON (100mA)
>
> I tried starting it, but it fails with /etc/rc.d/bluetooth: ERROR:
> Unable to setup Bluetooth stack
> for device ubt1
>
> Can anyone suggest what probably obvious thing I might be missing? I'd
> really love to
> be able to use my earbuds on this system.

Do you see any other IO or STALLED errors from the USB device if you check demsg?

-- 
Bjoern A. Zeeb                                                     r15:7