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Date:   Mon, 21 Feb 2022 13:22:01 +0000
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From:   Chris Clayton <chris2553@googlemail.com>
Subject: Re: bug kernel 5.17, qualcom and intel adapters, unable to reliably
 connect to bluetooth devices
To:     Chris Murphy <lists@colorremedies.com>,
        Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Cc:     Bluetooth <linux-bluetooth@vger.kernel.org>
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Sorry folks, clicked Send instead of Save Draft in my earlier message.

Anyway...

On 18/02/2022 03:49, Chris Murphy wrote:
> On Thu, Feb 17, 2022 at 5:15 PM Luiz Augusto von Dentz
> <luiz.dentz@gmail.com> wrote:
>>
>> Hi Chris,
>>
>> On Thu, Feb 17, 2022 at 3:36 PM Chris Murphy <lists@colorremedies.com> wrote:
>>>
>>> OK I started over, and for now keeping the reporting constrained to
>>> the hardware I personally have on hand.
>>>
>>> Hardware:
>>> Lenovo Thinkpad X1 Carbon Gen 7
>>> Bus 001 Device 004: ID 8087:0aaa Intel Corp. Bluetooth 9460/9560
>>> Jefferson Peak (JfP)
>>> Sony 1000XM3 headset
>>> bluez-5.63-3.fc36.x86_64
>>>
>>> kernel 5.17.0-rc4
>>> * remove the paired headset with bluetoothctl
>>> * reset the headset so it's not longer paired either
>>> * put the headset in pairing mode
>>> * GNOME Settings Bluetooth panel sees -> LE_WH-1000XM3, Not Setup
>>> * click on Not Setup and nothing happens
>>
>> Well from the logs it doesn't seem the GNOME Setting is trying to do
>> anything, have you tried bluetoothctl> connect <address>
> 
> `bluetoothctl scan on`  does see the device
> $ bluetoothctl pair 38:18:4C:24:2D:1D
> Device 38:18:4C:24:2D:1D not available
> $ bluetoothctl connect 38:18:4C:24:2D:1D
> Device 38:18:4C:24:2D:1D not available
> 
> $ journalctl -b -o short-monotonic --no-hostname | grep -i blue
> https://drive.google.com/file/d/1x9EDvDx6XUowyRy2056n6uW-4PLx5KRb/view?usp=sharing
> 
> 

I too am experiencing the problem that already-paired devices fail to connect to my laptop when running a 5.17 kernel.

Extract from dmesg shows:
[    3.825684] Bluetooth: hci0: Waiting for firmware download to complete
[    3.825910] Bluetooth: hci0: Firmware loaded in 1551910 usecs
[    3.825910] Bluetooth: hci0: unexpected event 0xff length: 5 > 0
[    3.825936] Bluetooth: hci0: Waiting for device to boot
[    3.839948] Bluetooth: hci0: unexpected event 0xff length: 7 > 0
[    3.839973] Bluetooth: hci0: Device booted in 13715 usecs
[    3.840205] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-19-0-4.ddc
[    3.843002] Bluetooth: hci0: Applying Intel DDC parameters completed
[    3.843926] Bluetooth: hci0: Firmware revision 0.4 build 125 week 46 2021

Extract from lshw shows:
                   description: Bluetooth wireless interface
                   product: AX201 Bluetooth
                   vendor: Intel Corp.
                   physical id: e
                   bus info: usb@1:e
                   version: 0.02
                   capabilities: bluetooth usb-2.01
                   configuration: driver=btusb maxpower=100mA speed=12Mbit/s

I don't know whether this will help, but I've found that the problem only occurs when boot from cold (i.e power on the
laptop. If I then do a warm reboot, my bluetooh devices connect successfully. The significant difference may be that on
a cold start, the firmware needs to loaded whereas on a warm reboot I see:

[    2.000989] Bluetooth: hci0: Firmware already loaded

Hope this helps. I am happy to test any fixes or provide additional diagnostics, but I'm not subscribed so please cc me.

Chris

> 
> --
> Chris Murphy
>