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Wifi won't connect in debian

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  Wifi won't connect in debian Simon Wooding <glasfryn27@gmail.com> - 2020-10-22 20:40 +0200
    Re: Wifi won't connect in debian Dan Ritter <dsr@randomstring.org> - 2020-10-22 21:20 +0200
    Re: Wifi won't connect in debian Keith Bainbridge <ke1thozgroups@gmx.com> - 2020-10-23 01:00 +0200

#228120 — Wifi won't connect in debian

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Hello,

I have a Lenovo Thinkpad which I used to run Windows on. A few days ago I
installed Debian 10.6.0 (first as dual-boot to make sure I could transfer
everything, later deleting the Windows partition). I had to install
non-free firmware to get wifi working during install, but I found the
required drivers on Intel's website and everything went smoothly from
there. Fast forward three days problem free and when I booted up this
morning I had lost some of the graphical features of my desktop environment
MATE (the top/bottom panels, my chosen theme, and a number of keyboard
shortcuts no longer worked) and I couldn't connect to the internet. I don't
know if these problems are related, but I can't fix the desktop environment
without internet access so it's somewhat moot.
Clarifications on the internet problems:
It's not my provider, that's been working fine all day on other devices
It's not a hardware fault; while I was trying out stuff to fix it I tried
using my boot-repair live usb to see if the hard drive was the problem, and
while in that mode connecting to the internet was easy and worked fine.
I'm not sure what difference using ethernet would make as I can't figure
out how to connect using that either but I do have access to an ethernet
port if needed.
I have tried a number of suggested solutions online, but none have worked
and I couldn't try a lot of them because they required packages I didn't
have and couldn't install offline.

I need wifi access back fairly promptly as I am a university student
studying remotely, so any help is thoroughly appreciated.

Thanks,
Simon

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#228123

Simon Wooding wrote: 
> I have a Lenovo Thinkpad which I used to run Windows on. A few days ago I
> installed Debian 10.6.0 (first as dual-boot to make sure I could transfer
> everything, later deleting the Windows partition). I had to install
> non-free firmware to get wifi working during install, but I found the
> required drivers on Intel's website and everything went smoothly from
> there. Fast forward three days problem free and when I booted up this
> morning I had lost some of the graphical features of my desktop environment
> MATE (the top/bottom panels, my chosen theme, and a number of keyboard
> shortcuts no longer worked) and I couldn't connect to the internet. I don't
> know if these problems are related, but I can't fix the desktop environment
> without internet access so it's somewhat moot.


> I'm not sure what difference using ethernet would make as I can't figure
> out how to connect using that either but I do have access to an ethernet
> port if needed.

Great, let's start with the ethernet port.


Plug in an ethernet cable -- check both ends are connected.

Start a terminal window.

ip link show

will get you a list of recognized network interfaces. The first
one will be lo, the loopback, and you can ignore that one.

With luck, one of them is named

en0 or enp4s0 or eth0 or something like that:

2: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq
state UP mode DEFAULT group default qlen 1000
    link/ether a8:a1:59:08:50:79 brd ff:ff:ff:ff:ff:ff

At this point, you can run

sudo dhclient enp4s0

(or whatever the name of the ethernet port is)

and it should tell you that it has connected and acquired an
address. Then you have Internet service, and other things can be
addresses.

Did a network interface starting with w show up? Tell us about
it.

run

lspci -v |grep Network

and tell us what it says.

-dsr-

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#228127

On 23/10/20 5:16 am, Simon Wooding wrote:
> Hello,
>
> I have a Lenovo Thinkpad which I used to run Windows on. A few days ago
> I installed Debian 10.6.0 (first as dual-boot to make sure I could
> transfer everything, later deleting the Windows partition). I had to
> install non-free firmware to get wifi working during install, but I
> found the required drivers on Intel's website and everything went
> smoothly from there. Fast forward three days problem free and when I
> booted up this morning I had lost some of the graphical features of my
> desktop environment MATE (the top/bottom panels, my chosen theme, and a
> number of keyboard shortcuts no longer worked) and I couldn't connect to
> the internet. I don't know if these problems are related, but I can't
> fix the desktop environment without internet access so it's somewhat moot.
> Clarifications on the internet problems:
> It's not my provider, that's been working fine all day on other devices
> It's not a hardware fault; while I was trying out stuff to fix it I
> tried using my boot-repair live usb to see if the hard drive was the
> problem, and while in that mode connecting to the internet was easy and
> worked fine.
> I'm not sure what difference using ethernet would make as I can't figure
> out how to connect using that either but I do have access to an ethernet
> port if needed.
> I have tried a number of suggested solutions online, but none have
> worked and I couldn't try a lot of them because they required packages I
> didn't have and couldn't install offline.
>
> I need wifi access back fairly promptly as I am a university student
> studying remotely, so any help is thoroughly appreciated.
>
> Thanks,
> Simon


Simon

The loss of Mate toolbars & shortcuts suggests to me that Mate started
clean instead of from the /home/user files you had before reboot; and
with them your wifi settings. Is /home on a separate partition?  If so,
did that partition mount properly?

Have you lost any other config type files following reboot?

--
Keith Bainbridge

ke1thozgroups@gmx.com

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