Ubuntu – No WiFi adapter found, Dell XPS 9570, Killer 1350 card


Linux newbie here. I've installed Ubuntu 18.04.1 alongside Windows 10 on my machine. Everything was working smoothly for about a week and then, all of a sudden, the network card just decided to die on me. After installing firmware, and rebooting network manager, the card was still not accessible through BIOS, through Windows or Ubuntu. I couldn't even see it.

So I got a new card from dell (as the laptop is still under warranty), but they only have the same card to replace it with. Now, I have Bluetooth and the card works when I boot into windows. However, under WiFi, it still says there is no WiFi adapter.

Can someone please help?

Some further info:

sudo lshw -C network:

*-network UNCLAIMED       
   description: Network controller
   product: QCA6174 802.11ac Wireless Network Adapter
   vendor: Qualcomm Atheros
   physical id: 0
   bus info: pci@0000:3b:00.0
   version: 32
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress cap_list
   configuration: latency=0
   resources: memory:ed200000-ed3fffff
   description: Ethernet interface
   physical id: 2
   logical name: enp0s20f0u5
   serial: 56:37:21:ac:5b:58
   capabilities: ethernet physical
   configuration: broadcast=yes driver=rndis_host driverversion=22-Aug-2005 firmware=RNDIS device  link=yes multicast=yes

rfkill list:

0: hci0: Bluetooth
  Soft blocked: no
  Hard blocked: no

dmesg | grep ath10k:

(gives me nothing)

lspci -nnk | grep 0280 -A3:

3b:00.0 Network controller [0280]: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter [168c:003e] (rev 32)
    Subsystem: Bigfoot Networks, Inc. QCA6174 802.11ac Wireless Network Adapter [1a56:1535]
    Kernel modules: ath10k_pci, wl
3c:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader [10ec:525a] (rev 01)

Best Answer

I think you have a broken kernel update, try

sudo apt install --reinstall linux-modules-extra-$(uname -r)