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I recently got sent a Dell Latitude 5510 from work, and it came with Windows 10. While in Windows, wifi works without problems. When I tried installing Ubuntu, the wifi adapter was not detected during install nor after. I used a wired connection to install, but the wifi adapter was not detected after the install either.

dmesg shows no errors:

$ sudo dmesg -T | grep iwl
[mar sep 14 15:12:44 2021] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
[mar sep 14 15:12:44 2021] iwlwifi 0000:00:14.3: api flags index 2 larger than supported by driver
[mar sep 14 15:12:44 2021] iwlwifi 0000:00:14.3: TLV_FW_FSEQ_VERSION: FSEQ Version: 65.3.35.22
[mar sep 14 15:12:44 2021] iwlwifi 0000:00:14.3: loaded firmware version 59.601f3a66.0 QuZ-a0-hr-b0-59.ucode op_mode iwlmvm
[mar sep 14 15:12:44 2021] iwlwifi 0000:00:14.3: Detected Intel(R) Wi-Fi 6 AX201 160MHz, REV=0x354

But the card doesn't show up in ip l and ubuntu also says there are no wireless adapters.

I'm using kernel version 5.11.0-34-generic

Some extra info:

$ lspci -nnk
00:14.3 Network controller [0280]: Intel Corporation Comet Lake PCH-LP CNVi WiFi [8086:02f0]
    DeviceName: Onboard - Ethernet
    Subsystem: Intel Corporation Comet Lake PCH-LP CNVi WiFi [8086:4070]
    Kernel driver in use: iwlwifi
    Kernel modules: iwlwifi

$ sudo lshw -C network
  -network:0

       description: Network controller
       product: Comet Lake PCH-LP CNVi WiFi
       vendor: Intel Corporation
       physical id: 14.3
       bus info: pci@0000:00:14.3
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list
       configuration: driver=iwlwifi latency=0
       resources: irq:16 memory:9133c000-9133ffff
  -network:1
       description: Ethernet interface
       product: Ethernet Connection (10) I219-LM
       vendor: Intel Corporation
       physical id: 1f.6
       bus info: pci@0000:00:1f.6
       logical name: eno2
       version: 00
       serial: 74:78:27:7b:33:a0
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=5.11.0-34-generic firmware=0.6-4 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:126 memory:91300000-9131ffff

I've tried upgrading to 20.10, using the latest firmware, installing backport-iwlwifi-dkms. Nothing worked so far. Right now I'm using a clean install with everything updated.

zeroone
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