linux-kernel - Re: Regression: Inoperative bluetooth, Intel chipset, mainline kernel 6.6.2+

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Date:   Sun, 3 Dec 2023 13:46:36 -0500
From:   "Kris Karas (Bug Reporting)" <bugs-a21@...nlit-rail.com>
To:     Oleksandr Natalenko <oleksandr@...alenko.name>,
        Linux Bluetooth <linux-bluetooth@...r.kernel.org>,
        Linux Regressions <regressions@...ts.linux.dev>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Basavaraj Natikar <Basavaraj.Natikar@....com>
Cc:     Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        Zach <zacheryvig@...look.com>,
        Paul Menzel <pmenzel@...gen.mpg.de>,
        Bagas Sanjaya <bagasdotme@...il.com>,
        Greg KH <gregkh@...uxfoundation.org>
Subject: Re: Regression: Inoperative bluetooth, Intel chipset, mainline kernel
 6.6.2+

[ Replying to both Oleksandr and Basavaraj ]

Oleksandr Natalenko wrote:
> Does passing `btusb.enable_autosuspend=N` via a kernel cmdline help? [1]

Yes, this works around the problem.  Should be a good short-term 
solution for those folks who need to wait for distro kernels to catch 
up.  Thanks.

Basavaraj Natikar wrote:
>> Can we enable RPM on specific controllers for AMD xHC 1.1
>> instead to cover all AMD xHC 1.1? 
>>
>> Please find below the proposed changes and let me know if it is OK?
> 
> sorry its 
> pdev->device == 0x43f7

Thanks, Basavaraj!  Yes, this fixes the problem on my hardware (by 
making application of PM more selective).  Running successfully at the 
moment using your (pdev->device amended) patch.

Kris