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Re: Instructions for command line usage of WiFi.

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On Tue, Nov 24, 2020 at 03:06:59PM -0800, peter@easthope.ca wrote:
> > "allow-hotplug" tells udev to raise a network interface after it's
> > attached to the kernel. This result of ifup is expected.
> 
> OK, thanks.  Same as "auto <interface>"?

No. "auto" means (taken directly from interfaces(5)):

Lines beginning with the word "auto" are used to identify the physical
interfaces to be brought up when ifup is run  with the  -a option.
(This option is also used by the system boot scripts, so interfaces
marked "auto" are brought up at boot time). 


The main difference between "auto" and "allow-hotplug" is, well, hotplug
processing. And judging from that "predictable" interface name, you're
using an USB dongle, so hotplug is important here.


> This is the only oddity evident after ifup wlxa0f3c10a28f7.
> 
>   DHCPDISCOVER on wlxa0f3c10a28f7 to 255.255.255.255 port 67 interval 3
>   send_packet: No buffer space available
>   dhclient.c:2445: Failed to send 300 byte long packet over wlxa0f3c10a28f7 interface.
> 
> Nevertheless, after a few more lines from DHCP the link works.
> Any ideas about buffer space?

The kernel has no free RAM to queue a packet or that Tp-Link device
you're is using low-quality kernel module. Happens with Tp-Link, but
there's a bright side - it could've been Broadcom.

Try increasing a value of vm.min_free_kbytes, it may help.

Reco

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Instructions for command line usage of WiFi. peter@easthope.ca - 2020-11-06 01:00 +0100
  Re: Instructions for command line usage of WiFi. Reco <recoverym4n@enotuniq.net> - 2020-11-06 06:30 +0100
    Re: Instructions for command line usage of WiFi. peter@easthope.ca - 2020-11-15 23:00 +0100
      Re: Instructions for command line usage of WiFi. Stefan Monnier <monnier@iro.umontreal.ca> - 2020-11-15 23:10 +0100
      Re: Instructions for command line usage of WiFi. David Wright <deblis@lionunicorn.co.uk> - 2020-11-17 16:40 +0100
    Re: Instructions for command line usage of WiFi. peter@easthope.ca - 2020-11-25 00:50 +0100
      Re: Instructions for command line usage of WiFi. Reco <recoverym4n@enotuniq.net> - 2020-11-25 08:50 +0100
        Re: Instructions for command line usage of WiFi. Celejar <celejar@gmail.com> - 2020-11-25 15:20 +0100
          Re: Instructions for command line usage of WiFi. Reco <recoverym4n@enotuniq.net> - 2020-11-25 15:50 +0100
            Re: Instructions for command line usage of WiFi. Celejar <celejar@gmail.com> - 2020-11-25 16:40 +0100
              Re: Instructions for command line usage of WiFi. Reco <recoverym4n@enotuniq.net> - 2020-11-25 17:20 +0100
                Re: Instructions for command line usage of WiFi. Celejar <celejar@gmail.com> - 2020-11-25 19:10 +0100
        Re: Instructions for command line usage of WiFi. peter@easthope.ca - 2020-11-27 01:00 +0100
          Re: Instructions for command line usage of WiFi. Gene Heskett <gheskett@shentel.net> - 2020-11-27 02:10 +0100
            Re: Instructions for command line usage of WiFi. peter@easthope.ca - 2020-11-27 17:10 +0100
          Re: Instructions for command line usage of WiFi. Reco <recoverym4n@enotuniq.net> - 2020-11-27 07:40 +0100
            Re: Instructions for command line usage of WiFi. peter@easthope.ca - 2020-11-27 18:40 +0100
              Re: Instructions for command line usage of WiFi. Dan Ritter <dsr@randomstring.org> - 2020-11-27 18:50 +0100
              Re: Instructions for command line usage of WiFi. Reco <recoverym4n@enotuniq.net> - 2020-11-27 19:10 +0100
                Re: Instructions for command line usage of WiFi. peter@easthope.ca - 2020-11-30 04:10 +0100
                Re: Instructions for command line usage of WiFi. Doug McGarrett <dmcgarrett@optonline.net> - 2020-11-30 05:50 +0100
                Re: Instructions for command line usage of WiFi. ghe2001 <ghe2001@protonmail.com> - 2020-11-30 07:10 +0100
                Re: Instructions for command line usage of WiFi. Reco <recoverym4n@enotuniq.net> - 2020-11-30 09:50 +0100
                Use of external connectors on a Sharp Mebius laptop; was Re: Instructions for command line usage of WiFi. peter@easthope.ca - 2020-12-01 03:10 +0100
              Re: Instructions for command line usage of WiFi. Gene Heskett <gheskett@shentel.net> - 2020-11-27 22:00 +0100
                Re: Instructions for command line usage of WiFi. Richard Hector <richard@walnut.gen.nz> - 2020-11-29 11:40 +0100
                Re: Instructions for command line usage of WiFi. Gene Heskett <gheskett@shentel.net> - 2020-11-29 13:40 +0100
        Instructions for command line usage of WiFi. peter@easthope.ca - 2020-11-27 04:50 +0100
      Re: Instructions for command line usage of WiFi. Wim <factotum_muth@web.de> - 2020-11-29 20:40 +0100
        Graphical environment; was, Re: Instructions for command line usage of WiFi. peter@easthope.ca - 2020-12-01 15:50 +0100

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