Comment # 7 on bug 1178013 from B

(In reply to Takashi Iwai from comment #6)

> 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.

I'm not sure how to use that command. Do I need to add any repos to find the
correct kernel?