Comment 2 for bug 1855978

Running somerville (somerville-bionic-amd64-iso-hybrid-20180608-47) on a Dell Precision 5540 with Intel 9260 wifi.
Upgrading linux-firmware from 1.713.12 to 1.713.13 introduced a regression where wifi stops working

lspci -vnnn|grep -i wireless:
3b:00.0 Network controller [0280]: Intel Corporation Wireless-AC 9260 [8086:2526] (rev 29)

uname -r:
4.15.0-1065-oem

dkms status:
fwts-efi-runtime-dkms, 19.12.00, 4.15.0-1064-oem, x86_64: installed (WARNING! Diff between built and installed module!)
fwts-efi-runtime-dkms, 19.12.00, 4.15.0-1065-oem, x86_64: installed (WARNING! Diff between built and installed module!)
nvidia, 410.93, 4.15.0-1036-oem, x86_64: installed
nvidia, 410.93, 4.15.0-1064-oem, x86_64: installed
nvidia, 410.93, 4.15.0-1065-oem, x86_64: installed
nvidia, 410.93, 4.15.0-70-generic, x86_64: installed
nvidia, 410.93, 4.15.0-72-generic, x86_64: installed
oem-wifi-iwlwifi-mainline-5.1rc1, 2, 4.15.0-1036-oem, x86_64: installed
oem-wifi-iwlwifi-mainline-5.1rc1, 2, 4.15.0-1064-oem, x86_64: installed
oem-wifi-iwlwifi-mainline-5.1rc1, 2, 4.15.0-1065-oem, x86_64: installed
oem-wifi-iwlwifi-mainline-5.1rc1, 2, 4.15.0-70-generic, x86_64: installed
oem-wifi-iwlwifi-mainline-5.1rc1, 2, 4.15.0-72-generic, x86_64: installed