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Custom kernel: no audio, no touchpad

From: Pierre Neidhardt
Subject: Custom kernel: no audio, no touchpad
Date: Thu, 27 Sep 2018 15:14:07 +0200
User-agent: mu4e 1.0; emacs 26.1

Hello Guix!

Exciting times ahead for me, I've successfully booted Guix on a custom

It works pretty well so far except for sound and touchpad support which
are missing.

On linux-libre:

--8<---------------cut here---------------start------------->8---
$ lspci -k
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
        Subsystem: Xiaomi Device 1604
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel, snd_soc_skl
--8<---------------cut here---------------end--------------->8---

I'm not sure where to get information about the Touchpad.  Well, my
laptop is a Xiaomi Air 13.

I've played with `make menuconfig` for a while and added a bunch of
Intel HD audio related modules,  loads of codecs, to no avail.

I guess I need more experience with the kernel.  Would anyone have some
tips or documentation pointers?

Even better: is there a way to derive the right .config from a working

Pierre Neidhardt

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