I'm trying to install Ubuntu 19.10 on an HP Notebook 14-cf1599sa using the mini.iso netboot image for amd64.

I only have a Wi-Fi internet connection available, but the netboot isn't creating a network adapter for me to configure — I expected wlan0 or similar, but it doesn't exist. The computer contains Intel Wireless-AC 9461 hardware, and the iwlwifi driver does appear to be loading successfully, including its firmware:

~ # dmesg | grep iwlwifi
[    2.379659] iwlwifi 0000:00:14.3: Found debug destination: EXTERNAL_DRAM
[    2.379661] iwlwifi 0000:00:14.3: Found debug configuration: 0
[    2.379887] iwlwifi 0000:00:14.3: loaded firmware version 46.6bf1df06.0 op_mode iwlmvm

But only the loopback and wired network adapters are present:

~ # ipconfig -a
eno1: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 04:0e:3c:d4:90:fb  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet  netmask
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

The netboot is running a recent Linux kernel version that should support this card:

~ # uname -a
Linux (none) 5.3.0-18-generic #19-Ubuntu SMP Tue Oct 8 20:14:06 UTC 2019 x86_64 GNU/Linux

Output from lspci -knn:

00:14.3 Network controller [0280]: Intel Corporation Cannon Point-LP CNVi [Wireless-AC] [8086:9df0] (rev 30)
    DeviceName: WLAN
    Subsystem: Intel Corporation Device [8086:0264]
    Kernel driver in use: iwlwifi

Running rfkill list did not output anything.

Some further information: I've put the output of modinfo iwlwifi here, and the full dmesg output here.

I have no idea what else to try here. Any ideas would be appreciated, thanks!

  • 1
    Please edit your question and add output of lspci -knn | grep Net -A3; rfkill list terminal command. – Pilot6 Dec 15 '19 at 18:30
  • I've added this extra information. Thanks for helping me ask a better question. – 14-cf1599sa owner Dec 15 '19 at 18:41

I solved this myself.

It turns out the the iwlmvm driver is not present on the netboot mini.iso, and this is required, in combination with the iwlwifi driver, to get the hardware working.

I used the following steps to resolve this:

  1. On a separate computer, download the linux-modules-extra-5.3.0-18-generic package for amd64. This matches the kernel version present on the netboot iso.
    • This was a file named linux-modules-extra-5.3.0-18-generic_5.3.0-18.19_amd64.deb.
  2. Extract the .deb file and copy the file lib/modules/5.3.0-18-generic/kernel/drivers/net/wireless/intel/iwlwifi/mvm/iwlmvm.ko to some removable storage.
  3. On the computer running the netboot installer, start a shell (e.g. via main menu, or pressing Ctrl+Alt+F2 or similar) and mount the removable storage on /mnt.
  4. Run modprobe mac80211.
  5. Run insmod /mnt/iwlmvm.ko.
  6. Continue the installation — the network should now be recognised.

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