MOTU M2 stopped working after upgrade to 5.5

[Takashi Iwai]

On Sat, 25 Apr 2020 23:40:04 +0200,
Michael Gebetsroither wrote:
> 
> On 25.04.20 21:29, Michael Gebetsroither wrote:
> Hi,
> 
> > I suspect c249177944b650816069f6c49b769baaa94339dc to be the reason for this
> > "ALSA: usb-audio: add implicit fb quirk for MOTU M Series"
> 
> Confirmed, if i revert this commit my Motu M2 interface works again as expected.
> With full sound quality (no audio drops or cracks in either in or output).
> And with the headset fully working again.

Then likely the issue being tracked on the bugzilla
  https://bugzilla.kernel.org/show_bug.cgi?id=207023

Feel free to join there.


Takashi