Ubuntu – WiFi not working after latest Ubuntu software update


I have a Dell laptop running Ubuntu 14.04 LTS
I purchased it new about a month ago.
This morning I got a popup about a Software Update available, so I updated, and now the wifi is not working at all.
I checked the networking menu and it shows NO networks detected.
Everything worked just fine until this latest software update.

Here's the output from lspci -knn | grep Net -A2

3a:00.0 Network Contoller [0280]: Intel Corporation Wireless 8260 [8086:24f3] (rev 3a)

         Subsystem: Intel Corporation Device [8086:0050]

3b:00.0 Unassingned class [ff00]: Realtek Semiconductor Co. ltd. Device [10ec:525a] (rev 01)

I tried the mokutil disable validation as described in the other problem report

sudo apt install mokutil
sudo mokutil –disable-validation

it forced me to create a new password, but still no wifi!!!

Here is lspci -vvnn
3a.00.0 Network Controller [0280]: Intel Corporation Wireless 8260 [8086:24f3] (rev 3a)
Subsytem : Intel Corporation Device [8086:0050]
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParERR- DEVSEL=fast >TAbort- SERR-

What driver should I have for the Intel 8260? I did lmod and I didn't see anything that looked like a wifi driver…

Best Answer

I booted in to the Bios Menu page, but hitting F-12 when the Dell logo appeared during boot up... I found the SecureBootMode setting under the Security settings, and disabled it, then after rebooting everything was fine.