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Re: WiFi works during install, not after

On Mon, 24 Oct 2016, tomas@tuxteam.de wrote:


Date: Mon, 24 Oct 2016 04:16:12
From: tomas@tuxteam.de
To: Carl Fink <carl@finknetwork.com>
Cc: Debian Users <debian-user@lists.debian.org>
Subject: Re: WiFi works during install, not after
Resent-Date: Mon, 24 Oct 2016 08:16:29 +0000 (UTC)
Resent-From: debian-user@lists.debian.org

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On Sun, Oct 23, 2016 at 05:09:06PM -0400, Carl Fink wrote:

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!


Yes, this is an irritating aspect of Debian installation. But, to
be honest, I don't know how one could do better, since the kernel
at installation doesn't need to be the finally installed kernel.

You have to make the firmware available to the installer at install
time in a directory /firmware in some removable media. The installer
usually stops to give you a chance to do that. If I read it correctly,
the installer looks somewhere below /media, where the removable
media is found.

See also [2] and [3] for more background and alternatives.


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.


Yeah (I think there's one 169 too much). This is a link-locak address,
after RFC3927. I try to keep my nets free of those ;-)


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.


Sic transit gloria mundi ;-/

regards

[1] https://wiki.debian.org/Firmware#Firmware_during_the_installation
[2] https://raphaelhertzog.com/2011/03/14/missing-firmware-in-debian-learn-how-to-deal-with-the-problem/
[3] https://wiki.debian.org/DebianInstaller/NetbootFirmware

- -- tom?s
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Debian already has lots of freedesktop.org stuff in it, so why not add netctl and make dialog package a dependency of it? True you don't get wifi working at start up after install, but a few commands and you make your network profile and are up on the internetwith netctl. To make network profiles you run wifi-menu -o and scan and select networks then key in your passphrase and if all goes well get returned to the command prompt. Then as root or equivalent netctl switch-to `netctl list`. If that command exits with no complaints reboot and you should have internet. The only thing is, if your network runs into problems you'll need to shut the network interface down or no more internet until that's done. You're effectively jammed. 





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