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From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Date:   Wed, 16 Feb 2022 15:49:45 -0800
Message-ID: <CABBYNZKfy-ntFhbx0TStNwFiwxCF4sPVaHS4wDbef0shb=pawg@mail.gmail.com>
Subject: Re: bug kernel 5.17, qualcom and intel adapters, unable to reliably
 connect to bluetooth devices
To:     Chris Murphy <lists@colorremedies.com>
Cc:     Bluetooth <linux-bluetooth@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
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Hi Chris,

On Tue, Feb 15, 2022 at 10:40 PM Chris Murphy <lists@colorremedies.com> wrote:
>
> On Tue, Feb 15, 2022 at 8:38 AM Chris Murphy <lists@colorremedies.com> wrote:
> >
> > On Tue, Feb 15, 2022 at 8:29 AM Chris Murphy <lists@colorremedies.com> wrote:
> > >
> > > On Thu, Feb 10, 2022 at 6:44 PM Chris Murphy <lists@colorremedies.com> wrote:
> > >
> > > > Case 2:
> > > >
> > > > Bus 001 Device 005: ID 8087:0aaa Intel Corp. Bluetooth 9460/9560
> > > > Jefferson Peak (JfP)
> > >
> > > Comparing 5.16.9 (working) and 5.17.0-rc7 (non-working) on this
> > > Thinkpad X1 Carbon, I'm seeing two notable differences:
> > >
> > > Multiple messages like this:
> > > [   15.731405] kernel: Bluetooth: hci0: unexpected event 0xff length: 5 > 0
>
>
> btmon is here:
> https://bugzilla.redhat.com/attachment.cgi?id=1860485

LE or Classic? Perhaps this is related to:

https://patchwork.kernel.org/project/bluetooth/patch/20220216221822.2694867-1-luiz.dentz@gmail.com/

Btw, in the logs it doesn't really show any connection attempt just
advertisements reports so perhaps you want to collect the logs while
attempting to connect or perhaps you are just waiting for the
auto-connect to kick in? Does your device appear to be advertising?

>
>
> >
> > This matches with a complaint I found here
> > https://lore.kernel.org/linux-bluetooth/20220125144639.2226-1-mike@fireburn.co.uk/
> > about this patch
> > https://lore.kernel.org/linux-bluetooth/20211201000215.1134831-13-luiz.dentz@gmail.com/
> >
> >
> >
> > --
> > Chris Murphy
>
>
>
> --
> Chris Murphy


-- 
Luiz Augusto von Dentz