Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #235461 > unrolled thread

Weird WiFi problem

Back to article view | Back to linux.debian.user

Contents

  Weird WiFi problem "Juan R. de Silva" <juan.r.d.silva@gmail.com> - 2021-05-24 02:00 +0200
    Re: Weird WiFi problem David Christensen <dpchrist@holgerdanske.com> - 2021-05-24 07:10 +0200
      Re: Weird WiFi problem "Juan R. de Silva" <juan.r.d.silva@gmail.com> - 2021-05-24 17:50 +0200
        Re: Weird WiFi problem Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-05-24 18:30 +0200
          Re: Weird WiFi problem Henning Follmann <hfollmann@itcfollmann.com> - 2021-05-24 19:30 +0200
            Re: Weird WiFi problem Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-05-25 04:00 +0200
              Re: Weird WiFi problem Henning Follmann <hfollmann@itcfollmann.com> - 2021-05-25 13:50 +0200
        Re: Weird WiFi problem Charles Curley <charlescurley@charlescurley.com> - 2021-05-24 19:40 +0200
          Re: Weird WiFi problem Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-05-25 03:50 +0200
            Re: Weird WiFi problem deloptes <deloptes@gmail.com> - 2021-05-25 10:30 +0200

#235461 — Weird WiFi problem

Help needed from somebody with the better networking knowledge than mine.

Debian Buster on Dell M4800 Mobile Workstation, Intel Corporation 
Wireless 7260 (rev bb) WiFi adapter. The ISP modem offers 2 WiFi bands: 
2.4G & 5G. The system connects automatically to 5G. 2.4G is reserved for 
my printer use. Email client - Evolution 3.30.5-1.1.

Starting of May 1, after system upgrade (dnsutils, bind9-host, and a 
bunch of related libs) I started having problems accessing GMail and 
Hotmail servers. Evolution ultimately connects and retrieves my mail but 
it take it from 20 up to 50 minutes. However, if I switch manually to 
2.4G band or if I wire the laptop to the modem, Evolution connects on fly 
with no time. Reinstalling suspected upgrade did not help.

My ISP replaced the modem with one with a newer firmware - no results

I finally noticed that when on 5G band my IPv6 address cannot be detected 
by any of "what is my IP websites". Only IPv4 is visible to the outside 
world. But when I switch to 2.4 band (or wire the laptop to the modem) my 
IPv6 address is correctly detected along with the IPv4 one.

CLI utilities confirm that my IPv6 is enabled and that WiFi interface is 
assigned an IPv6 address. One for 2.4G band & a different one for 5G 
band. I'm pushing my ISP to investigate their part of the network. But 
what bothers me is that I'm not sure in it. What if either Intel adapter 
or its Linux driver is in fault. And I have no means to test that...

Any suggestions folks?..

[toc] | [next] | [standalone]

#235480

On 5/23/21 4:55 PM, Juan R. de Silva wrote:
> Help needed from somebody with the better networking knowledge than mine.
> 
> Debian Buster on Dell M4800 Mobile Workstation, Intel Corporation
> Wireless 7260 (rev bb) WiFi adapter. The ISP modem offers 2 WiFi bands:
> 2.4G & 5G. The system connects automatically to 5G. 2.4G is reserved for
> my printer use. Email client - Evolution 3.30.5-1.1.
> 
> Starting of May 1, after system upgrade (dnsutils, bind9-host, and a
> bunch of related libs) I started having problems accessing GMail and
> Hotmail servers. Evolution ultimately connects and retrieves my mail but
> it take it from 20 up to 50 minutes. However, if I switch manually to
> 2.4G band or if I wire the laptop to the modem, Evolution connects on fly
> with no time. Reinstalling suspected upgrade did not help.
> 
> My ISP replaced the modem with one with a newer firmware - no results
> 
> I finally noticed that when on 5G band my IPv6 address cannot be detected
> by any of "what is my IP websites". Only IPv4 is visible to the outside
> world. But when I switch to 2.4 band (or wire the laptop to the modem) my
> IPv6 address is correctly detected along with the IPv4 one.
> 
> CLI utilities confirm that my IPv6 is enabled and that WiFi interface is
> assigned an IPv6 address. One for 2.4G band & a different one for 5G
> band. I'm pushing my ISP to investigate their part of the network. But
> what bothers me is that I'm not sure in it. What if either Intel adapter
> or its Linux driver is in fault. And I have no means to test that...
> 
> Any suggestions folks?..


Where is your Internet connection -- e.g. what country?


Who is your ISP?  Please provide a URL.


What Internet service plan do you have?  Please provide a URL with the 
plan details.


What is the make and model of your "modem"?  Please provide a URL for 
the support page.


Is the "modem" provided by your ISP acting as a bridge or a router? 
Where is the DHCP server -- at your ISP or the "modem"?  Where is the 
DNS proxy -- at your ISP or the "modem"?  Do your local devices have 
public IP addresses or private LAN addresses?


David

[toc] | [prev] | [next] | [standalone]

#235488

On Sun, 23 May 2021 21:53:45 -0700, David Christensen wrote:

> On 5/23/21 4:55 PM, Juan R. de Silva wrote:
>> Help needed from somebody with the better networking knowledge than
>> mine.
>> 
>> Debian Buster on Dell M4800 Mobile Workstation, Intel Corporation
>> Wireless 7260 (rev bb) WiFi adapter. The ISP modem offers 2 WiFi bands:
>> 2.4G & 5G. The system connects automatically to 5G. 2.4G is reserved
>> for my printer use. Email client - Evolution 3.30.5-1.1.
>> 
>> Starting of May 1, after system upgrade (dnsutils, bind9-host, and a
>> bunch of related libs) I started having problems accessing GMail and
>> Hotmail servers. Evolution ultimately connects and retrieves my mail
>> but it take it from 20 up to 50 minutes. However, if I switch manually
>> to 2.4G band or if I wire the laptop to the modem, Evolution connects
>> on fly with no time. Reinstalling suspected upgrade did not help.
>> 
>> My ISP replaced the modem with one with a newer firmware - no results
>> 
>> I finally noticed that when on 5G band my IPv6 address cannot be
>> detected by any of "what is my IP websites". Only IPv4 is visible to
>> the outside world. But when I switch to 2.4 band (or wire the laptop to
>> the modem) my IPv6 address is correctly detected along with the IPv4
>> one.
>> 
>> CLI utilities confirm that my IPv6 is enabled and that WiFi interface
>> is assigned an IPv6 address. One for 2.4G band & a different one for 5G
>> band. I'm pushing my ISP to investigate their part of the network. But
>> what bothers me is that I'm not sure in it. What if either Intel
>> adapter or its Linux driver is in fault. And I have no means to test
>> that...
>> 
>> Any suggestions folks?..
> 
> 
> Where is your Internet connection -- e.g. what country?
> 
> 
> Who is your ISP?  Please provide a URL.
> 
> 
> What Internet service plan do you have?  Please provide a URL with the
> plan details.
> 
> 
> What is the make and model of your "modem"?  Please provide a URL for
> the support page.
> 
> 
> Is the "modem" provided by your ISP acting as a bridge or a router?
> Where is the DHCP server -- at your ISP or the "modem"?  Where is the
> DNS proxy -- at your ISP or the "modem"?  Do your local devices have
> public IP addresses or private LAN addresses?
> 
> 
> David

I finally narrowed the problem to one specific source by installing  
Windows 10 and KDE Neon in parallel to my Debian. After booting into 
either of them and using 5G WiFi band my IPv6 address is visible from the 
outside world as expected. Thus now I know that both my adapter and its 
Linux driver are fine, which clearly marks my Debian 10 being corrupted 
in some way.

Right now I'm inclined to resolve this odd problem by reinstalling 
Debian. It looks to be an easier path comparing to finding a weird GNOME 
bug without even having a minimal clue of what part might be responsible 
for it.

If this problem shows up once again this will make an end of GNOME for 
me. Using GNOME for many years I've been reluctant to change DE. May be 
it's the time now. :-(

Sorry, I'm answering neither of your (in other circumstances rightful) 
questions, since IMHO my findings made them irrelevant to the case. 

Thanks

[toc] | [prev] | [next] | [standalone]

#235489

[Multipart message — attachments visible in raw view] — view raw

On 2021-05-24 11:47 a.m., Juan R. de Silva wrote:
> On Sun, 23 May 2021 21:53:45 -0700, David Christensen wrote:
> 
>> On 5/23/21 4:55 PM, Juan R. de Silva wrote:
>>> Help needed from somebody with the better networking knowledge than
>>> mine.
>>>
>>> Debian Buster on Dell M4800 Mobile Workstation, Intel Corporation
>>> Wireless 7260 (rev bb) WiFi adapter. The ISP modem offers 2 WiFi bands:
>>> 2.4G & 5G. The system connects automatically to 5G. 2.4G is reserved
>>> for my printer use. Email client - Evolution 3.30.5-1.1.
>>>
>>> Starting of May 1, after system upgrade (dnsutils, bind9-host, and a
>>> bunch of related libs) I started having problems accessing GMail and
>>> Hotmail servers. Evolution ultimately connects and retrieves my mail
>>> but it take it from 20 up to 50 minutes. However, if I switch manually
>>> to 2.4G band or if I wire the laptop to the modem, Evolution connects
>>> on fly with no time. Reinstalling suspected upgrade did not help.
>>>
>>> My ISP replaced the modem with one with a newer firmware - no results
>>>
>>> I finally noticed that when on 5G band my IPv6 address cannot be
>>> detected by any of "what is my IP websites". Only IPv4 is visible to
>>> the outside world. But when I switch to 2.4 band (or wire the laptop to
>>> the modem) my IPv6 address is correctly detected along with the IPv4
>>> one.
>>>
>>> CLI utilities confirm that my IPv6 is enabled and that WiFi interface
>>> is assigned an IPv6 address. One for 2.4G band & a different one for 5G
>>> band. I'm pushing my ISP to investigate their part of the network. But
>>> what bothers me is that I'm not sure in it. What if either Intel
>>> adapter or its Linux driver is in fault. And I have no means to test
>>> that...
>>>
>>> Any suggestions folks?..
>>
>>
>> Where is your Internet connection -- e.g. what country?
>>
>>
>> Who is your ISP?  Please provide a URL.
>>
>>
>> What Internet service plan do you have?  Please provide a URL with the
>> plan details.
>>
>>
>> What is the make and model of your "modem"?  Please provide a URL for
>> the support page.
>>
>>
>> Is the "modem" provided by your ISP acting as a bridge or a router?
>> Where is the DHCP server -- at your ISP or the "modem"?  Where is the
>> DNS proxy -- at your ISP or the "modem"?  Do your local devices have
>> public IP addresses or private LAN addresses?
>>
>>
>> David
> 
> I finally narrowed the problem to one specific source by installing  
> Windows 10 and KDE Neon in parallel to my Debian. After booting into 
> either of them and using 5G WiFi band my IPv6 address is visible from the 
> outside world as expected. Thus now I know that both my adapter and its 

> Linux driver are fine, which clearly marks my Debian 10 being corrupted 

> in some way.
> 
> Right now I'm inclined to resolve this odd problem by reinstalling 
> Debian. It looks to be an easier path comparing to finding a weird GNOME 
> bug without even having a minimal clue of what part might be responsible 
> for it.
> 
> If this problem shows up once again this will make an end of GNOME for 
> me. Using GNOME for many years I've been reluctant to change DE. May be 

> it's the time now. :-(

What a crazy thing here...
Now desktop environment cause network problem !

Ever tried using your network card from the CLI without loading Gnome
and doing a real test, also using Gnome without using the Network
Manager but other way of managing your network connection (as it's not a
obligation to use the NetworkManager).

> 
> Sorry, I'm answering neither of your (in other circumstances rightful) 
> questions, since IMHO my findings made them irrelevant to the case. 
> 
> Thanks
> 

-- 
Polyna-Maude R.-Summerside
-Be smart, Be wise, Support opensource development

[toc] | [prev] | [next] | [standalone]

#235491

On Mon, May 24, 2021 at 12:24:30PM -0400, Polyna-Maude Racicot-Summerside wrote:
> 
> 
> On 2021-05-24 11:47 a.m., Juan R. de Silva wrote:
> > On Sun, 23 May 2021 21:53:45 -0700, David Christensen wrote:
> > 
[...]
> > 
> > I finally narrowed the problem to one specific source by installing  
> > Windows 10 and KDE Neon in parallel to my Debian. After booting into 
> > either of them and using 5G WiFi band my IPv6 address is visible from the 
> > outside world as expected. Thus now I know that both my adapter and its 
> 
> > Linux driver are fine, which clearly marks my Debian 10 being corrupted 
> 
> > in some way.
> > 
> > Right now I'm inclined to resolve this odd problem by reinstalling 
> > Debian. It looks to be an easier path comparing to finding a weird GNOME 
> > bug without even having a minimal clue of what part might be responsible 
> > for it.
> > 
> > If this problem shows up once again this will make an end of GNOME for 
> > me. Using GNOME for many years I've been reluctant to change DE. May be 
> 
> > it's the time now. :-(
> 
> What a crazy thing here...
> Now desktop environment cause network problem !

Hmm I do not think that a play by play is a decent way to solve any
problems or to communicate on a public forum.

... anyway ...


> 
> Ever tried using your network card from the CLI without loading Gnome
> and doing a real test, also using Gnome without using the Network
> Manager but other way of managing your network connection (as it's not a
> obligation to use the NetworkManager).

Yes, there is nmcli which is the command line interface to your friendly
network manager. I think it works rather well.

> 
> > 
> > Sorry, I'm answering neither of your (in other circumstances rightful) 
> > questions, since IMHO my findings made them irrelevant to the case. 
> > 
> > Thanks
> > 
> 
> -- 
> Polyna-Maude R.-Summerside
> -Be smart, Be wise, Support opensource development
ask smart questions
http://catb.org/~esr/faqs/smart-questions.html

be wise, and collect meaningful information before asking.



-H




-- 
Henning Follmann           | hfollmann@itcfollmann.com

[toc] | [prev] | [next] | [standalone]

#235495

[Multipart message — attachments visible in raw view] — view raw

On 2021-05-24 1:16 p.m., Henning Follmann wrote:
> On Mon, May 24, 2021 at 12:24:30PM -0400, Polyna-Maude Racicot-Summerside wrote:
>>
>>
>> On 2021-05-24 11:47 a.m., Juan R. de Silva wrote:
>>> On Sun, 23 May 2021 21:53:45 -0700, David Christensen wrote:
>>>
> [...]
>>>
>>> I finally narrowed the problem to one specific source by installing  
>>> Windows 10 and KDE Neon in parallel to my Debian. After booting into 
>>> either of them and using 5G WiFi band my IPv6 address is visible from 
the 
>>> outside world as expected. Thus now I know that both my adapter and its 
>>
>>> Linux driver are fine, which clearly marks my Debian 10 being corrupted 
>>
>>> in some way.
>>>
>>> Right now I'm inclined to resolve this odd problem by reinstalling 
>>> Debian. It looks to be an easier path comparing to finding a weird GNOME 
>>> bug without even having a minimal clue of what part might be responsible 
>>> for it.
>>>
>>> If this problem shows up once again this will make an end of GNOME for 
>>> me. Using GNOME for many years I've been reluctant to change DE. May be 
>>
>>> it's the time now. :-(
>>
>> What a crazy thing here...
>> Now desktop environment cause network problem !
> 
> Hmm I do not think that a play by play is a decent way to solve any
> problems or to communicate on a public forum.
> 
> ... anyway ...
> 
> 
>>
>> Ever tried using your network card from the CLI without loading Gnome
>> and doing a real test, also using Gnome without using the Network
>> Manager but other way of managing your network connection (as it's not 
a
>> obligation to use the NetworkManager).
> 
> Yes, there is nmcli which is the command line interface to your friendly
> network manager. I think it works rather well.
> 
So why don't you first try doing a real diagnostic on your network.
That is :
Connect as single user mode.
Use iwconfig to connect to your network.

Gnome is a whole stack of software and only a small config problem in it
may be causing your problem.

You jump pretty fast too conclusion.

What you say here make as much sense as changing of operating system
because the version of LibreOffice bundled doesn't fit you well.

The problem is in the network stack, then go find where the problem may be.

You don't look at log, or don't talk like you did any type of diagnostic
other than doing two doubtful comparison and jump to a real fast conclusion.

If you can connect using iwconfig then try using nmcli.
If using iwconfig work but not nmcli then you have two choice.
Either you configure your system to use the network without network
manager or you debug the problem into NetworkManager.

If you really want people to help you out, you also have to do your share.

That is : give logs about your system.
Accept to do diagnostic before making unjustified affirmation (that is,
without nothing to support them, AKA acting like Trump's stolen election).
>>
>>>
>>> Sorry, I'm answering neither of your (in other circumstances rightful) 
>>> questions, since IMHO my findings made them irrelevant to the case. 
>>>
>>> Thanks
>>>
>>
>> -- 
>> Polyna-Maude R.-Summerside
>> -Be smart, Be wise, Support opensource development
> ask smart questions
> http://catb.org/~esr/faqs/smart-questions.html
> 
> be wise, and collect meaningful information before asking.
> 
> 
> 
> -H
> 
> 
> 
> 

-- 
Polyna-Maude R.-Summerside
-Be smart, Be wise, Support opensource development

[toc] | [prev] | [next] | [standalone]

#235503

On Mon, May 24, 2021 at 09:50:04PM -0400, Polyna-Maude Racicot-Summerside wrote:
> 
> 
> On 2021-05-24 1:16 p.m., Henning Follmann wrote:
> > On Mon, May 24, 2021 at 12:24:30PM -0400, Polyna-Maude Racicot-Summerside wrote:
[...]

> >>
> >> What a crazy thing here...
> >> Now desktop environment cause network problem !
> > 
> > Hmm I do not think that a play by play is a decent way to solve any
> > problems or to communicate on a public forum.
> > 
> > ... anyway ...
> > 
> > 
> >>
> >> Ever tried using your network card from the CLI without loading Gnome
> >> and doing a real test, also using Gnome without using the Network
> >> Manager but other way of managing your network connection (as it's not 
> a
> >> obligation to use the NetworkManager).
> > 
> > Yes, there is nmcli which is the command line interface to your friendly
> > network manager. I think it works rather well.
> > 
> So why don't you first try doing a real diagnostic on your network.

I am sorry. I created a big missunderstanding here. I actually assumed
you were the auther of the OP.
Sorry again, for creating this confusion here.

And I agree with what yous said; collecting logs, information etc.
Tho with a slighter less degree about iwconfig ;).



> That is :
> Connect as single user mode.
> Use iwconfig to connect to your network.
> 
> Gnome is a whole stack of software and only a small config problem in it
> may be causing your problem.
> 
> You jump pretty fast too conclusion.
> 
> What you say here make as much sense as changing of operating system
> because the version of LibreOffice bundled doesn't fit you well.
> 
> The problem is in the network stack, then go find where the problem may be.
> 
> You don't look at log, or don't talk like you did any type of diagnostic
> other than doing two doubtful comparison and jump to a real fast conclusion.
> 
> If you can connect using iwconfig then try using nmcli.
> If using iwconfig work but not nmcli then you have two choice.
> Either you configure your system to use the network without network
> manager or you debug the problem into NetworkManager.
> 
> If you really want people to help you out, you also have to do your share.
> 
> That is : give logs about your system.
> Accept to do diagnostic before making unjustified affirmation (that is,
> without nothing to support them, AKA acting like Trump's stolen election).
> >>
> >>>
> >>> Sorry, I'm answering neither of your (in other circumstances rightful) 
> >>> questions, since IMHO my findings made them irrelevant to the case. 
> >>>
[...]


Cheers,

-H







-- 
Henning Follmann           | hfollmann@itcfollmann.com

[toc] | [prev] | [next] | [standalone]

#235492

On Mon, 24 May 2021 15:47:26 -0000 (UTC)
"Juan R. de Silva" <juan.r.d.silva@gmail.com> wrote:

> Right now I'm inclined to resolve this odd problem by reinstalling 
> Debian. It looks to be an easier path comparing to finding a weird
> GNOME bug without even having a minimal clue of what part might be
> responsible for it.
> 
> If this problem shows up once again this will make an end of GNOME
> for me. Using GNOME for many years I've been reluctant to change DE.
> May be it's the time now. :-(

I doubt very much that Gnome is your problem. More likely Network
Manager or whatever you are using is your problem. Re-installing
Debian, and doing all the customization one usually does after a new
installation sounds to me like a lot of work for an unsure outcome.

> CLI utilities confirm that my IPv6 is enabled and that WiFi interface
> is assigned an IPv6 address. One for 2.4G band & a different one for
> 5G band.

I suspect that this is part of your problem. If you have access to your
DHCP and DNS servers, I suggest you change that.

If you are using Modem Manager, you can watch syslog to see what the
DHCP server gives you computer when it assigns an address.

tail -f /var/log/syslog

I'd look for differences between the two bands. They should be pretty
much the same.

-- 
Does anybody read signatures any more?

https://charlescurley.com
https://charlescurley.com/blog/

[toc] | [prev] | [next] | [standalone]

#235496

[Multipart message — attachments visible in raw view] — view raw

On 2021-05-24 1:31 p.m., Charles Curley wrote:
> On Mon, 24 May 2021 15:47:26 -0000 (UTC)
> "Juan R. de Silva" <juan.r.d.silva@gmail.com> wrote:
> 
>> Right now I'm inclined to resolve this odd problem by reinstalling 
>> Debian. It looks to be an easier path comparing to finding a weird
>> GNOME bug without even having a minimal clue of what part might be
>> responsible for it.
>>
>> If this problem shows up once again this will make an end of GNOME
>> for me. Using GNOME for many years I've been reluctant to change DE.
>> May be it's the time now. :-(
> 
> I doubt very much that Gnome is your problem. More likely Network
> Manager or whatever you are using is your problem. Re-installing
> Debian, and doing all the customization one usually does after a new
> installation sounds to me like a lot of work for an unsure outcome.
> 

This sound pretty much like what I was saying...

Try to isolate where the problem comes from...
Between the launch of the computer and the complete Gnome desktop
launched, much happens in matter of network.

1st try to connect to your network using CLI (nmcli)
2nd try to connact to your network by using CLI tools like iwconfig
directly.
3rd look at the logs.
>> CLI utilities confirm that my IPv6 is enabled and that WiFi interface
>> is assigned an IPv6 address. One for 2.4G band & a different one for
>> 5G band.
> 
> I suspect that this is part of your problem. If you have access to your
> DHCP and DNS servers, I suggest you change that.
> 
You are exactly pointing to a real solution here.
It's jumping pretty fast to conclusion about Gnome itself being the
cause of any type of network problem.

> If you are using Modem Manager, you can watch syslog to see what the
> DHCP server gives you computer when it assigns an address.
> 
> tail -f /var/log/syslog
> 
> I'd look for differences between the two bands. They should be pretty
> much the same.
> 

By the way, I didn't ask any question.
I only suggested to try connecting to the network using single user text
mode instead of going thru Gnome whole stack.
-- 
Polyna-Maude R.-Summerside
-Be smart, Be wise, Support opensource development

[toc] | [prev] | [next] | [standalone]

#235497

Polyna-Maude Racicot-Summerside wrote:

> You are exactly pointing to a real solution here.
> It's jumping pretty fast to conclusion about Gnome itself being the
> cause of any type of network problem.

Sorry for the sarcasm and it might be inappropriate on the list, but I can
not hold it :D
Gnome is not causing any problems - it is the problem :D :D :D 

Honestly - from my experience things work today and don't work tomorrow. The
next day developers or whoever decides to introduce a new look and feel
etc. I stopped using it exactly 20y ago and I quit KDE in 2008 when they
did the same with the launch of the "great new" KDE4.

regards

[toc] | [prev] | [standalone]

Back to top | Article view | linux.debian.user

csiph-web