Comment # 6 on bug 1178013 from Takashi Iwai

(In reply to B from comment #5)
> (In reply to Takashi Iwai from comment #3)
> > Please fill the bug description as well instead of pasting a reference to a
> > forum.
> > 
> > And, is this a kernel regression?  That is, if you boot with the older
> > kernel, does it work again?
> 
> Well, I think so? I only tried it with openSUSE Leap and it worked without
> issues.

That's a different user-space stuff, so cannot judge only from that.
On the TW system, you can install an older kernel that is available in OBS
history repo:
  http://download.opensuse.org/history/

Install the older one and check whether you still reproduce the problem with
it.

Alternatively, if it worked on Leap 15.2, you can install Leap 15.2 kernel on
top of TW system for testing, too.  In either way, use zypper install
--oldpackage option.