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Why does 18.04 not detect WiFi devices that 16.04 detects

Hello.

I have UbuntuMATE running on different systems - mostly 16.04.x, but,
on one computer, I have 18.04 running.

One of the problems with 18.04, is that it does not detect WiFi
sources, that 16.04 detects.

Both detect my cellphone as a hotspot, okay, but I also have two WiFi
4G modem/routers, and, whilst 16.04.x sees them okay, and, can connect
to them okay, 18.04 does not see them, and, can not detect them.

I tried downloading and running WiFi radar and something named
LinSSID, but, while I can load WiFi Radar, it can only find my
cellphone, and nothing else (18.04 does see a WiFi printer that we
have; an HP one, that 16.04 can see, but WiFi Radar can not even see
that), and, LinSSID does not appear to load. Both of those
applications, are on 18.04.

So, I am wondering why 18.04 does not detect WiFi devices, that 16.04
finds without any problems.

Comments

Re: Why does 18.04 not detect WiFi devices that 16.04 detects

By Colin Law at 07/07/2019 - 17:06

On Sun, 7 Jul 2019 at 21:40, Bret Busby <bret. ... at gmail dot com> wrote:
First run a live Image of 16.04 on the PC that is showing the problem
and make sure that it is, in fact, the Ubuntu version that is causing
the problem.

Also make sure that the Firmware (BIOS) is up to date on the
motherboard. That applies whatever the results of the first test.

You said "One of the problems", I therefore deduce that there are
other problems. It might be interesting to know what they are.

Colin

Re: Why does 18.04 not detect WiFi devices that 16.04 detects

By Bret Busby at 07/07/2019 - 17:49

On 08/07/2019, Colin Law < ... at gmail dot com> wrote:
From (I think) System Profiler and Benchmarks, or, HardInfo,

BIOS
(Because it does not display the date in the ISO format, I do not know
whether that is 09 August, or, 08 September, but it probably does not
make much difference, in this context)
Vendor: AMI
Version: 370H4W0X.103

I am assuming that that is not "up to date", as mitigations have, I
believe, been released, for vulnerabilities in Intel microcode (I
think it is), and, as the operating system is updated, and, includes
means for updating (I think) BIOS/UEFI, the Date should be within the
last couple of months, if operating system security updates would have
updated it.

However, the Date of the BIOS, is, I believe, more recent than the
hardware of the computer running 16.04.x, that detects the wifi
devices that the 18.04 does not detect.

Missing packages, less functionality, loss of things like menu bars in
applications, menu's and the software installer, don't show packages,
etc, etc, etc. And, some of the packages, like Midori, appear to have
been downgraded.