wifi not working with 18.04.02

yesterday my machine (ASUS E200H) upgraded to 18.04.02 and now the wifi doesn’t work. I’ve tried following just about every instruction and still no joy. I’ve been for 10 hours now. Bluetooth works,which is how I’m connected just now.

wilbur@wilbur-E200HA:~$   rfkill list all 0: hci0: Bluetooth     Soft blocked: no     Hard blocked: no wilbur@wilbur-E200HA:~$   

wilbur@wilbur-E200HA:~$   sudo lspci -knn | grep Net -A3 01:00.0 Network controller [0280]: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter [168c:0042] (rev 31)     Subsystem: AzureWave QCA9377 802.11ac Wireless Network Adapter [1a3b:2b31]     Kernel driver in use: ath10k_pci     Kernel modules: ath10k_pci wilbur@wilbur-E200HA:~$  

wilbur@wilbur-E200HA:~$ sudo lshw -C network *-network
description: Network controller product: QCA9377 802.11ac Wireless Network Adapter vendor: Qualcomm Atheros physical id: 0 bus info: pci@0000:01:00.0 version: 31 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: driver=ath10k_pci latency=0 resources: irq:126 memory:91200000-913fffff *-network description: Ethernet interface physical id: 1 logical name: bnep0 serial: f0:03:8c:a2:28:58 capabilities: ethernet physical configuration: broadcast=yes ip= multicast=yes wilbur@wilbur-E200HA:~$