ath10k wifi has stopped suddenly

Having been working fine this afternoon, my wifi no longer works. I have run all the checks suggested in other posts and find that:
YaST reports the Qualcomm chip fully in Hardware Information
hwinfo does not
the firmware is installed and modprobe reports no problems
YaST Network Settings does not report a wlan connection
NetworkManager is running
wicked is not
Possibilities? firmware problem? a chip failure notwithstanding that YaST Hardware Information lists it? Any suggestions, please?

See:
https://forums.opensuse.org/showthread.php/534542-Kernel-firmware-update-20181026-lp150-2-6-1-locks-up-system

Thanks for that.