Re: bug kernel 5.17, qualcom and intel adapters, unable to reliably connect to bluetooth devices

[Luiz Augusto von Dentz <luiz.dentz@gmail.com>]

Hi Chris,

On Mon, Feb 21, 2022 at 12:23 PM Chris Clayton <chris2553@googlemail.com> wrote:
>
> Hi Luiz,
>
> On 21/02/2022 17:11, Luiz Augusto von Dentz wrote:
> > Hi Chris,
> >
> > On Mon, Feb 21, 2022 at 5:22 AM Chris Clayton <chris2553@googlemail.com> wrote:
> >>
> >> 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.
> >
> > What exactly doesn't work? Can't you power up the controller, etc?
>
> I have two bluetooth audio devices. One is a set of headphones and the other is a speaker. Both are paired with my
> laptop and, normally, both automatically connect to the laptop when I power them on. I've had the speaker for three
> years or more is has worked fine with all kernels that I have used up to and including the latest stable series -
> 5.16.10. The headphones were acquired a year or so ago and to date have worked with all kernels I have had installed
> since then. Consequently, this problem is a 5,17 regression.
>
> After a cold (power-on) boot with a 5.17 kernel, they do no connect automatically when switched on. Furthermore, if I
> use the blueman application to attempt to connect, that attempt fails. The only way that I have found to connect
> successfully is to do a reboot, after which the devices can connect automatically when I switch them on.
>
> I'm sorry, I have no idea what you mean by "Can't you power up the controller, etc?"

Use btmon to capture the trace when you attempt to connect, it also
would be a good idea to use bluetoothctl when attempting to connect.

-- 
Luiz Augusto von Dentz