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From: =?UTF-8?Q?Timo_Schr=C3=B6der?= <der.timosch@gmail.com>
Date: Fri, 7 Jun 2024 23:43:14 +0200
Message-ID: <CAGew7BseJ18yjTu5AFWr=B3c41gXe4T=B0JqFWvXjQYvcDPfTA@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: regressions@leemhuis.info
Cc: Luiz Augusto von Dentz <luiz.dentz@gmail.com>, stable@vger.kernel.org, 
	regressions@lists.linux.dev, linux-bluetooth@vger.kernel.org, 
	luiz.von.dentz@intel.com
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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.timosch@=
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 having
> >> 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-1000XM3
> >> the A2DP profiles are missing and with the Shure BT1 HFP/HSP profiles
> >> 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 still
> >> 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 and
> > that by some chance didn't happen when running with HCI_AMP reverted?
> >
> > 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 feel
> 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 would
> be good to known if current mainline (e.g. 6.10-rc) is affected as well.
>
> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> --
> 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 syste=
ms.