This is a new Lenovo laptop R720. Before installing, I had been warned at boot time that a controller 3 was unknown and that I would experience problems. I obtain the exact same message from gparted live or other linuxes like Manjaro and this message remains at every boot.
Well, I have no wifi and can connect only to the web with Ethernet. It’s this problematic controller:
03:00.0 Network controller: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter (rev 31) Subsystem: Lenovo QCA9377 802.11ac Wireless Network Adapter Flags: bus master, fast devsel, latency 0, IRQ 334 Memory at a4000000 (64-bit, non-prefetchable) [size=2M] Capabilities:  Power Management version 3 Capabilities:  MSI: Enable+ Count=1/8 Maskable+ 64bit- Capabilities:  Express Endpoint, MSI 00 Capabilities:  Advanced Error Reporting Capabilities:  Virtual Channel Capabilities:  Device Serial Number 00-00-00-00-00-00-00-00 Capabilities:  Latency Tolerance Reporting Capabilities:  L1 PM Substates Kernel driver in use: ath10k_pci Kernel modules: ath10k_pci
I have the latest linux-firmwware.
In the folder /lib/firmware/ath10k/QCA9377/hw1.0 I can find what I think is the right driver :
Looking for advice…