Hi Florian,

"pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de> skribis:

> Please consider the attached patch.  I chose to go without
> kernel-module-loader-service (only copying its requirements field)
> because I do not know how to conditionally extend or start another
> Shepherd service from an activation snippet.
>
> I tested it on QEMU with and without nomodeset.  With a previous Guix
> System install image, it stayed black when adding a nomodeset kernel
> parameter.  I will test again on real hardware now, but previous
> testing of uvesafb-enabled installer images proved successful unlike
> non-uvesafb images.

Great.

> From 85a95ce758384979a0aae3bc9065197c74862b4b Mon Sep 17 00:00:00 2001
> From: Florian Pelz <pelzflorian@pelzflorian.de>
> Date: Sat, 11 Apr 2020 18:56:37 +0200
> Subject: [PATCH] installer: Load uvesafb kernel module.
> MIME-Version: 1.0
> Content-Type: text/plain; charset=UTF-8
> Content-Transfer-Encoding: 8bit
>
> Fixes <https://bugs.gnu.org/40538>.
>
> Machines without Kernel Mode Setting (those with many old and current AMD
> GPUs, SiS GPUs, …) need uvesafb to show the GUI installer.  Some may also need
> a kernel parameter like nomodeset or vga=793, but we leave that for the user
> to specify in GRUB.
>
> * gnu/system/install.scm (uvesafb-shepherd-service): New procedure.
> (uvesafb-service-type): New variable.
> (%uvesafb-service): New variable.
> (%installation-services): Add it.

I made the following adjustments.

I also confirmed that everything goes well in QEMU, but obviously we’ll
have to test on hardware.

Let’s publish an RC2 tomorrow so we can get feedback.

Thank you!

Ludo’.