Comment # 57 on bug 1193124 from Takashi Iwai

First of all, please give the full dmesg, not only a part.

(In reply to George Olson from comment #49)
> Ok, I have installed each of the patches one by one. Here are the results.
> 
> Patches 1-11 all result in bluetooth working for me.
> Patch 12 results in a bluetooth failure.

Do you mean that you installed the kernel in comment 30

 
http://download.opensuse.org/repositories/home:/tiwai:/bsc1193124/standard/x86_64/kernel-default-devel-5.15.5-1.1.g5892887.x86_64.rpm

and tested btusb-*-kmp-default one by one with that kernel?
Has the kernel worked ever without KMP at first?

And, you mentioned that it worked with btusb-11-kmp: it's something wrong. 
With btusb-11-kmp, it's the same code as the genuine TW 5.15.x kernel.  IOW, if
btusb-11-kmp works, 5.15.x TW kernel should work as-is.  Please confirm this
again.

Looking back at the old logs, I'm afraid that your problem is different from
Harri's, any my patch won't cover it.  Maybe I'll need to drop the workaround
added there for your device again...

For further debugging, please get the btmon logs as described, *but* until you
hit the actual BT problem (i.e. after connecting to the device, etc).
At best, try to get the logs from the good-working TW 5.14.x kernel (found in
TW history repo) and the broken 5.15.x kernel.