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i have trouble with internal wifi card on my Dell Latitude 5590 runing Ubuntu 16.04 LTS. What happend before problem occured:

  1. I recieved notification that my laptop has updates, updated it, enrolled MOK (as it begged) and everything worked fine.
  2. I decided to remove Code::Blocks, which resulted into this
  3. Restarted pc and Ubuntu lost embedded wifi adapter

sudo lshw -C Network shows

  *-network UNCLAIMED     
       description: Network controller
       product: Wireless 8265 / 8275
       vendor: Intel Corporation

lspci -nn recognizes adapter

02:00.0 Network controller [0280]: 
 Corporation Wireless 8265 / 8275 [8086:24fd] (rev 78)

and rfkill list output is

0: dell-wifi: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: dell-bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: no
2: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

As far as i understood the problem is in oem-wifi-intel-iwlwifi-lp1757035-4.4-dkms-dkms, because then i try to reinstall it with sudo apt-get install --reinstall oem-wifi-intel*, it stops, signaling Bad return status for module build on kernel: 4.4.0-143-generic

Pilot6
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nonForgivingJesus
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    Why don't you remove that dkms module completely and install HWE kernel? – Pilot6 Mar 18 '19 at 18:12
  • How can i do that? Up to this moment i tried interfere OS as minimal as possible so as not to break anything :^) – nonForgivingJesus Mar 18 '19 at 18:16
  • This is related to https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/xenial/commit/?h=master-next&id=9c72ad08f1510332e9314046e6a2adba5064f39a – Jeremy31 Mar 21 '19 at 17:45

1 Answers1

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The 4.4 kernel doesn't support your wireless adapter. That is the reason you installed some dkms module with a backport of that driver.

After a kernel update the driver doesn't build, or is blocked by Secure Boot.

I suggest removing that dkms package completely and switch to a HWE kernel that does support your wireless adapter.

First boot with the previous kernel using grub menu. Wi-Fi should work.

Then run in a terminal

sudo apt purge 'oem-wifi-intel.*'
sudo apt install linux-generic-hwe-16.04

Reboot.

Pilot6
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  • I just ran commands you gave and everything worked as charm. You are a magician, thank you! – nonForgivingJesus Mar 18 '19 at 18:25
  • If you have an ethernet cable, you should be able to just plug in and run these commands instead of using grub menu to boot into previous kernel. – Garrett Mar 21 '19 at 08:51
  • I had to adapt it for matching the current Ubuntu release (currently 18.04), but it does work! Thanks. Here is a generic command to install it: sudo apt install linux-generic-hwe-$(lsb_release -r | cut -f2) – psychoslave Nov 08 '19 at 10:12