Comment # 6 on bug 1004343 from Jonathan Kang

(In reply to Yifan Jiang from comment #2)
> Looked a bit, if it doesn't popup, probably the get-updates transaction does
> not happen at all.
> 
> The interesting thing I see the transaction is skipped when a gnome-software
> binary is there:
> 

Yes, this is exactly what the problem is.

gnome-software does exist in openSUSE, so "get-updates" signal won't be
connected to the callback. The notification should still work when you have
some upgrades for the system, but not for some package updates.

I'll do a quick fix for it.