bug#22274: GuixSD resets hardware clock (on Lenovo x200 with libreboot)

[Mark H Weaver <mhw@netris.org>]

Christopher Allan Webber <cwebber@dustycloud.org> writes:

> From e60db83ffff23c57ec5c44de7c99cee8e4e353ff Mon Sep 17 00:00:00 2001
> From: Christopher Allan Webber <cwebber@dustycloud.org>
> Date: Sun, 17 Jan 2016 20:34:25 -0800
> Subject: [PATCH] gnu: Add linux-libre-4.2.5
>
> This older version of linux-libre is being added because it was found
> that newer versions (or at least 4.3.3) of linux-libre were not reading
> the hardware clock on (at least Libreboot-enabled) Thinkpad x200
> machines.
>
> * gnu/linux.scm (linux-libre-4.2.5): New variable.

I would say that the variable should be named 'linux-libre-4.2', which
would always be bound to the latest 4.2.x.  However, there's another
problem: the 4.2 branch is no longer supported upstream, so it will no
longer receive security updates and other important fixes.

I suggest that we instead add linux-libre-4.1, which is still supported
upstream and is designated as an LTS branch.  Would that be okay?

Another issue is that the kernel config for 4.3 is being used here.  I
guess maybe that's working well enough in this case, but really our
kernel packages should be refactored somewhat to make this nicer.

One more thing: Francis Rowe told me that the coreboot developers have
determined that this is a bug on their side, and libreboot will
cherry-pick the fix soon, if it hasn't already.

     Thanks!
       Mark