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I'm running 22.04.1 on a Lenovo X220 laptop. I was having some trouble with a faulty fan, and just replaced it with a new one. When I put everything back together and booted it up, my fan issues were solved, but wi-fi seems not to work anymore.

I'm concerned that either:

  1. I somehow damaged the wi-fi card when taking the computer apart, or
  2. My OS has mysteriously forgotten about the card and somehow needs to be reminded.

Any ideas on how to tell the difference between these two things? Here's what I know so far:

lspci -k shows two entries that seem relevant:

00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (Lewisville) (rev 04)
    Subsystem: Lenovo ThinkPad T520
    Kernel driver in use: e1000e
    Kernel modules: e1000e

for my ethernet (which works just fine), and

03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] (rev 34)
    Subsystem: Intel Corporation Centrino Advanced-N 6205 (802.11a/b/g/n)
    Kernel driver in use: iwlwifi
    Kernel modules: iwlwifi

for the wi-fi. I get something similar from lshw:

           *-network
                description: Network controller
                product: Centrino Advanced-N 6205 [Taylor Peak]
                vendor: Intel Corporation
                physical id: 0
                bus info: pci@0000:03:00.0
                version: 34
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list
                configuration: driver=iwlwifi latency=0
                resources: irq:30 memory:d2400000-d2401fff

It looks like my firmware is OK:

$ sudo dmesg | grep iwlwifi
[   15.853806] iwlwifi 0000:03:00.0: can't disable ASPM; OS doesn't have ASPM control
[   16.302507] iwlwifi 0000:03:00.0: loaded firmware version 18.168.6.1 6000g2a-6.ucode op_mode iwldvm

I don't know if the ASPM thing is a big deal; I ran sudo fwts aspm and it gave some warnings about L0s not enabled but no obvious failures.

However, it seems like nmcli doesn't know about the wi-fi card. If I unplug the ethernet cable (since it's not relevant here), I get:

np0s25: unavailable
        "Intel 82579LM"
        ethernet (e1000e), F0:DE:F1:62:D6:31, hw, mtu 1500

lo: unmanaged
        "lo"
        loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536

Any ideas about what might be wrong here?

UPDATE: I ran the wireless-info script from this post and pasted the results at: https://pastebin.com/dEbb2i4a

mchid
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cjolley
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1 Answers1

2

Not sure if this fix will help anyone else, but I tried booting into a previous kernel version and everything worked. I followed the instructions here to set GRUB to boot into 5.15.0-53-generic by default (instead of 5.15.0-56-generic).

cjolley
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