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From: =?UTF-8?Q?Timo_Schr=C3=B6der?= <der.timosch@gmail.com>
Date: Sat, 8 Jun 2024 14:24:48 +0200
Message-ID: <CAGew7Bu3FBQfUya4vK-qr+D6zRiP4dquXY_0uND9TaHh-VT10w@mail.gmail.com>
Subject: Re: Bluetooth Kernel Bug: After connecting either HFP/HSP or A2DP is
 not available (Regression in 6.9.3, 6.8.12)
To: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Cc: regressions@leemhuis.info, stable@vger.kernel.org, 
	regressions@lists.linux.dev, linux-bluetooth@vger.kernel.org, 
	luiz.von.dentz@intel.com
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Hi Luiz,
as requested I opened an issue. Please see:
https://github.com/bluez/bluez/issues/865

Best regards,
Timo

Am Sa., 8. Juni 2024 um 00:01 Uhr schrieb Luiz Augusto von Dentz
<luiz.dentz@gmail.com>:
>
> Hi Timo,
>
> On Fri, Jun 7, 2024 at 5:43=E2=80=AFPM Timo Schr=C3=B6der <der.timosch@gm=
ail.com> wrote:
> >
> > Am Fr., 7. Juni 2024 um 08:10 Uhr schrieb Linux regression tracking
> > (Thorsten Leemhuis) <regressions@leemhuis.info>:
> > >
> > > On 06.06.24 23:23, Luiz Augusto von Dentz wrote:
> > > > On Thu, Jun 6, 2024 at 4:46=E2=80=AFPM Timo Schr=C3=B6der <der.timo=
sch@gmail.com> wrote:
> > > >> on my two notebooks, one with Ubuntu (Mainline Kernel 6.9.3, bluez
> > > >> 5.7.2) and the other one with Manjaro (6.9.3, bluez 5.7.6) I'm hav=
ing
> > > >> problems with my Sony WH-1000XM3 and Shure BT1. Either A2DP or HFP=
/HSP
> > > >> is not available after the connection has been established after a
> > > >> reboot or a reconnection. It's reproducible that with the WH-1000X=
M3
> > > >> the A2DP profiles are missing and with the Shure BT1 HFP/HSP profi=
les
> > > >> are missing. It also takes longer than usual to connect and I have=
 a
> > > >> log message in the journal:
> > > >>
> > > >> Jun 06 16:28:10 liebig bluetoothd[854]:
> > > >> profiles/audio/avdtp.c:cancel_request() Discover: Connection timed=
 out
> > > >> (110)
> > > >>
> > > >> When I disable and re-enable bluetooth (while the Headsets are sti=
ll
> > > >> on) and trigger a reconnect from the notebooks, A2DP and HFP/HSP
> > > >> Profiles are available again.
> > > >>
> > > >> I also tested it with 6.8.12 and it's the same problem. 6.8.11 and
> > > >> 6.9.2 don't have the problem.
> > > >> So I did a bisection. After reverting commit
> > > >> af1d425b6dc67cd67809f835dd7afb6be4d43e03 "Bluetooth: HCI: Remove
> > > >> HCI_AMP support" for 6.9.3 it's working again without problems.
> > > >>
> > > >> Let me know if you need anything from me.
> > > >
> > > > Wait what, that patch has nothing to do with any of these profiles =
not
> > > > really sure how that would cause a regression really, are you sure =
you
> > > > don't have actual connection timeout happening at the link layer an=
d
> > > > that by some chance didn't happen when running with HCI_AMP reverte=
d?
> > > >
> > > > I'd be surprised that HCI_AMP has any effect in most controllers
> > > > anyway, only virtual controllers was using that afaik.
> > >
> > > Stupid question from a bystander without knowledge in the field (so f=
eel
> > > free to ignore this): is that patch maybe causing trouble because it =
has
> > > some hidden dependency on a earlier change that was not backported to
> > > 6.9.y?
> > >
> > > Timo, to rule that out (and it's good to know in general, too) it wou=
ld
> > > be good to known if current mainline (e.g. 6.10-rc) is affected as we=
ll.
> > >
> > > Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' h=
at)
> > > --
> > > Everything you wanna know about Linux kernel regression tracking:
> > > https://linux-regtracking.leemhuis.info/about/#tldr
> > > If I did something stupid, please tell me, as explained on that page.
> >
> > Hallo Thorsten, I tried with 6.10-rc2 and it's the same problem on my s=
ystems.
>
> Could you please create a issue at
> https://github.com/bluez/bluez/issues and then attach btmon traces and
> bluetoothd? This is a really weird regression, also is your system
> using pulseaudio or pipewire?
>
> --
> Luiz Augusto von Dentz