Issue with kernel upgrade

[daithi_dearg]

Hello,

Got upgraded to 5.4.0-51 but on the reboot I lost my wifi card.

I ran the synaptics manager and removed the 5.4.0-52 references. I then ran:
sudo apt --fix-broken install
and I no longer saw any errors so I assumed I was home and free.

I applied updates then and while it upgraded fine I lost the Wifi.

Sorry may have got a bit lost on running this but maybe it wouldn't have made much difference:
apt update and
apt list --upgradeable

Wireless is Intel Wireless-AC 9260

[tea for one]

If you are happy that you now do not have any broken packages, I would open a new thread about the Wifi in Networking & Wireless.

Intel wifi is generally reliable and supported in Ubuntu - power off and reboot - it may well re-appear.

[daithi_dearg]

@teaforone
Thanks for all the assistance.
This particular issue is resolved. Thank you.

[daithi_dearg]

I still have this issue and from what I can see the issue is that I am missing the iwlwifi drivers. I wonder could I copy these from another kernel.

I have Wifi working on this older 42 kernel.

I wonder is it possible to check a kernel to see what drivers are included.

Hope this helps in representing what I am seeing:

david@david-N7x0WU:~$ uname -r
5.4.0-42-generic

david@david-N7x0WU:~$ ls -ltr /boot/initrd.img*
lrwxrwxrwx 1 root root       27 Oct 21 08:11 /boot/initrd.img.old -> initrd.img-5.4.0-45-generic
lrwxrwxrwx 1 root root       27 Oct 21 08:11 /boot/initrd.img -> initrd.img-5.4.0-51-generic
-rw-r--r-- 1 root root 36294669 Oct 21 11:09 /boot/initrd.img-5.4.0-45-generic
-rw-r--r-- 1 root root 82535585 Oct 21 11:10 /boot/initrd.img-5.4.0-42-generic
-rw-r--r-- 1 root root 36304316 Nov  3 11:50 /boot/initrd.img-5.4.0-51-generic

david@david-N7x0WU:~$ ls /lib/modules/5.4.0-42-generic/kernel/drivers/net/wireless/intel/iwlwifi/
dvm  iwlwifi.ko  mvm

david@david-N7x0WU:~$ ls /lib/modules/*/kernel/drivers/net/
/lib/modules/5.4.0-42-generic/kernel/drivers/net/:
appletalk  can       ethernet   gtp.ko      ifb.ko      macvtap.ko     netdevsim        phy        sb1000.ko      team                virtio_net.ko  vxlan.ko  xen-netback
arcnet     dsa       fddi       hamradio    ipvlan      mdio.ko        net_failover.ko  plip       slip           thunderbolt-net.ko  vmxnet3        wan
bonding    dummy.ko  fjes       hyperv      macsec.ko   mii.ko         nlmon.ko         ppp        sungem_phy.ko  usb                 vrf.ko         wimax
caif       eql.ko    geneve.ko  ieee802154  macvlan.ko  netconsole.ko  ntb_netdev.ko    rionet.ko  tap.ko         veth.ko             vsockmon.ko    wireless

/lib/modules/5.4.0-45-generic/kernel/drivers/net/:
bonding  dummy.ko  ethernet  geneve.ko  ifb.ko  macvlan.ko  mdio.ko  netconsole.ko    ppp   tap.ko   virtio_net.ko  vxlan.ko
caif     eql.ko    fddi      hyperv     ipvlan  macvtap.ko  mii.ko   net_failover.ko  slip  veth.ko  vmxnet3        xen-netback

/lib/modules/5.4.0-51-generic/kernel/drivers/net/:
bonding  dummy.ko  ethernet  geneve.ko  ifb.ko  macvlan.ko  mdio.ko  netconsole.ko    ppp   tap.ko   virtio_net.ko  vxlan.ko
caif     eql.ko    fddi      hyperv     ipvlan  macvtap.ko  mii.ko   net_failover.ko  slip  veth.ko  vmxnet3        xen-netback