Weird WiFi problem

From	"Juan R. de Silva" <juan.r.d.silva@gmail.com>
Newsgroups	linux.debian.user
Subject	Weird WiFi problem
Date	2021-05-24 02:00 +0200
Message-ID	<Ci6aJ-1P6-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Show all headers | View raw

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?..

Back to linux.debian.user | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

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

csiph-web