3

I recently ran sudo apt-get upgrade; sudo apt-get upgrade and after rebooting found that my wireless internet wasn't working anymore.

Here's what I'm running:

OS: Ubuntu 20.04 focal
Kernel: x86_64 Linux 5.4.0-45-generic
DE: Xfce

I ran sudo lshw -C network:

  *-network UNCLAIMED       
       description: Network controller
       product: Wi-Fi 6 AX200
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:52:00.0
       version: 1a
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix cap_list
       configuration: latency=0
       resources: memory:ceb00000-ceb03fff

I ran lspci to find my network controller:

52:00.0 Network controller: Intel Corporation Wi-Fi 6 AX200 (rev 1a)

And lspci -nnk | grep 0280 -A3:

52:00.0 Network controller [0280]: Intel Corporation Wi-Fi 6 AX200 [8086:2723] (rev 1a)
        Subsystem: Intel Corporation Wi-Fi 6 AX200 [8086:0080]
        Kernel modules: iwlwifi

And dmesg | grep iwlwifi:

[   11.790522] Loading modules backported from iwlwifi
[   11.790522] iwlwifi-stack-public:master:8613:3ae69204
[   11.817749] iwlwifi 0000:52:00.0: enabling device (0000 -> 0002)
[   12.217466] iwlwifi: probe of 0000:52:00.0 failed with error -110

From there on, however, I was lost. I followed instructions in a number of other posts and answers: 1 2 3 4. Here's what I tried:

  • I downloaded the newest driver and copy-pasted it into /lib/firmware. Turns out I already had it.
  • I tried installing the backport: sudo apt install backport-iwlwifi-dkms
  • I tried installing a more complicated version of the backport:
git clone https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/backport-iwlwifi.git
cd backport-iwlwifi/
make defconfig-iwlwifi-public
sudo make defconfig-iwlwifi-public
sed -i 's/CPTCFG_IWLMVM_VENDOR_CMDS=y/# CPTCFG_IWLMVM_VENDOR_CMDS is not set/' .config
make -j4
sudo make install
sudo modprobe iwlwifi

So I still haven't solved it, and I don't want to keep poking around solo (since I don't know what I'm doing and don't want to wreck my system). I'm posting here via USB/Ethernet, which works just fine. What's confusing me is that I appear to have the right drivers installed into /lib/firmware, but it still won't work. How do I fix this?

Newb
  • 131
  • 9

1 Answers1

2

I managed to fix it: I ran apt-get --reinstall install linux-firmware. The reinstall seems to have fixed whatever the underlying issue was. To quote this answer:

Don't try to manually install from an archive provided by Intel. Always try to find a package that provides the driver if possible.

I still get an ominous "system problem detected" GUI message on boot, but I'll let that sit for now.

Newb
  • 131
  • 9