WiFi works during install, not after

From	Carl Fink <carl@finknetwork.com>
Newsgroups	linux.debian.user
Subject	WiFi works during install, not after
Date	2016-10-23 23:10 +0200
Message-ID	<svybL-65C-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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So I have a ThinkPad Yoga 11s ultrabook.

If I copy over the firmware-realtek package, Debian can install just 
fine over the WiFi connection. (I don't have wired internet at my home.)

After install, everything is fine, except I can't connect to the WiFi. I 
know it's possible because the installer does it!

The wlan0 interface exists and is up, but "dhclient wlan0" ends up 
assigning 169.169.254.8.192, which is not a routable address. As you 
might expect, attempts to ping/connect to external systems via IP 
address fail with "Destination host unreachable" and of course, DNS 
lookups universally fail.

This ultrabook is supposed to have the rtl8723au chipset, which is a USB 
802.11/Bluetooth chipset that for some reason Lenovo used in the laptop, 
with an inside-the-case-only USB connection.

The firmware-realtek package is installed on the ultrabook.

Interestingly, the rtl8723au module is NOT loaded, and "modprobe 
rtl8723au" fails with a message about the module not being found, even 
though it's right there if I "locate rtl8723au", in the drivers/staging 
directory. Maybe the staging area isn't used by default? I confess I 
don't remember how to change the path that is searched for loadable modules.

Any insights would be most gratefully received.

-- 
Carl Fink
carl@finknetwork.com

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Thread

WiFi works during install, not after Carl Fink <carl@finknetwork.com> - 2016-10-23 23:10 +0200
  Re: WiFi works during install, not after <tomas@tuxteam.de> - 2016-10-24 10:20 +0200
    Re: WiFi works during install, not after Jude DaShiell <jdashiel@panix.com> - 2016-10-25 05:20 +0200
  Fwd: WiFi works during install, not after Carl Fink <carl@finknetwork.com> - 2016-10-25 03:20 +0200
    Re: Fwd: WiFi works during install, not after deloptes <deloptes@gmail.com> - 2016-10-25 09:00 +0200
      Re: Fwd: WiFi works during install, not after Carl Fink <carl@finknetwork.com> - 2016-10-25 15:30 +0200
        Re: Fwd: WiFi works during install, not after Patrick Bartek <nemommxiv@gmail.com> - 2016-10-25 18:50 +0200
          Re: Fwd: WiFi works during install, not after Carl Fink <carlf@panix.com> - 2016-10-26 19:20 +0200
            Re: Fwd: WiFi works during install, not after Brian <ad44@cityscape.co.uk> - 2016-10-26 20:40 +0200
              Re: Fwd: WiFi works during install, not after Carl Fink <carl@finknetwork.com> - 2016-10-27 03:10 +0200
                Re: Fwd: WiFi works during install, not after Brian <ad44@cityscape.co.uk> - 2016-10-27 12:10 +0200
            Re: Fwd: WiFi works during install, not after Patrick Bartek <nemommxiv@gmail.com> - 2016-10-27 03:10 +0200
  Re: WiFi works during install, not after Brian <ad44@cityscape.co.uk> - 2016-10-25 10:50 +0200
    Re: WiFi works during install, not after Carl Fink <carl@finknetwork.com> - 2016-10-25 15:40 +0200
      Re: WiFi works during install, not after Brian <ad44@cityscape.co.uk> - 2016-10-25 16:30 +0200
        Re: WiFi works during install, not after Carl Fink <carl@finknetwork.com> - 2016-10-25 18:40 +0200
          Re: WiFi works during install, not after Brian <ad44@cityscape.co.uk> - 2016-10-25 18:50 +0200
            Re: WiFi works during install, not after Carl Fink <carlf@panix.com> - 2016-10-26 19:00 +0200
              Re: WiFi works during install, not after Brian <ad44@cityscape.co.uk> - 2016-10-26 19:20 +0200
                Re: WiFi works during install, not after Carl Fink <carlf@panix.com> - 2016-10-26 19:30 +0200
                Re: WiFi works during install, not after Lisi Reisz <lisi.reisz@gmail.com> - 2016-10-29 16:30 +0200
                Re: WiFi works during install, not after Brian <ad44@cityscape.co.uk> - 2016-10-29 16:40 +0200
                Re: WiFi works during install, not after Carl Fink <carl@finknetwork.com> - 2016-10-29 16:40 +0200
                Re: WiFi works during install, not after Lisi Reisz <lisi.reisz@gmail.com> - 2016-10-29 18:30 +0200
                Re: WiFi works during install, not after Brian <ad44@cityscape.co.uk> - 2016-10-29 21:20 +0200
                Re: WiFi works during install, not after Lisi Reisz <lisi.reisz@gmail.com> - 2016-10-29 23:30 +0200

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