On 31/12/2021 19:53, Luiz Augusto von Dentz wrote: > Hi Chris, > > On Fri, Dec 31, 2021 at 2:35 AM Chris Clayton <chris2553@xxxxxxxxxxxxxx> wrote: >> >> On 30/12/2021 09:21, Chris Clayton wrote: >>> Hi, >>> >>> I pulled the latest changes into my clone of Linus' tree and built and installed the kernel. (git describe gives >>> v5.16-rc7-9-ge7c124bd0463). I'm seeing errors reported by the bluetooth subsystem that i don't see in 5.15.12 or 5.10.89 >>> >>> The problem seems to occur twice during system startup and on each occasion I see a batch of identical error messages: >>> >>> [ 3.980822] Bluetooth: hci0: Failed to read codec capabilities (-56) >>> [ 3.982812] Bluetooth: hci0: Failed to read codec capabilities (-56) >>> [ 3.984812] Bluetooth: hci0: Failed to read codec capabilities (-56) >>> [ 3.986608] Bluetooth: hci0: Failed to read codec capabilities (-56) >>> [ 3.987621] Bluetooth: hci0: Failed to read codec capabilities (-56) >>> [ 3.988606] Bluetooth: hci0: Failed to read codec capabilities (-56) >>> [ 3.989650] Bluetooth: hci0: Failed to read codec capabilities (-56) >>> >> >> Sorry, I should have said that despite the above errors, my bluetooth devices still work fine. > > Would be great to have the HCI trace (btmon). > How would I go about capturing that, please? This all happens during boot, so I don't have access to the system to set up a trace. > @Kiran K Is this to be expected? > >> >>> A full dmesg log is attached. I've also attached Two files containing the output from "lsusb -v" run on 5.10.89 and >>> 5.16-rc7. >>> >>> Please let me know if I can provide any other diagnostic information or test any patches. You'll need to cc me on >>> replies because I'm not subscribed to LKML or linux-bluetooth. >>> >>> Thanks > > >
