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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

- -- tomás
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