Installing the driver on Ubuntu 18.04 on CJscope Z-530 GX causes system hang

[林博仁(Buo-ren, Lin)]

## Overview ##
System becomes unresponsive after installing the backport driver via Additional Drivers interface

## Symptoms ##
* Often system hang during graphical login, stuck at login page
* Often system hang during reboot, requires Magic SysRq sequence to force reboot

## Additional information ##
Product page: https://www.cjscope.com.tw/cht/product_detail.php?serial=287
Chip seems to be: Intel(R) Dual Band Wireless AC 9462, REV=0x318
Dmesg output attached
Version: 7906-0ubuntu3~18.04.1 from bionic archive

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: backport-iwlwifi-dkms (not installed)
ProcVersionSignature: Ubuntu 5.3.0-18.19-generic 5.3.1
Uname: Linux 5.3.0-18-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CurrentDesktop: KDE
Date: Wed Jan 22 10:10:21 2020
InstallationDate: Installed on 2019-01-03 (383 days ago)
InstallationMedia: ezgo 14 KDE (Based on Kubuntu 18.04 LTS "Bionic Beaver") - Release amd64 (20180718)
SourcePackage: backport-iwlwifi-dkms
UpgradeStatus: No upgrade log present (probably fresh install)

[You-Sheng Yang (vicamo)]

Bug 1859389 should have marked backport-iwlwifi-dkms OBSOLETE_BY="5.0.0" and it should have no longer active in your system (which also follows you may remove that dkms safely). Should it still have problem, please reopen this issue with current kernel logs.