GNU bug report logs - #39671
Something appears to disable linux kernel modules from loading.

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From: Ludovic Courtès <ludo <at> gnu.org>
To: Joshua Branson <jbranso <at> dismail.de>
Cc: 39671 <at> debbugs.gnu.org
Subject: bug#39671: Something appears to disable linux kernel modules from loading.
Date: Wed, 19 Feb 2020 22:31:32 +0100

Hi!

Joshua Branson <jbranso <at> dismail.de> skribis:

> After I rebooted sway refused to start.  The sway error message said
>
> #+BEGIN_SRC sh
> $ sway
>
> [backend/backend.c:339] Failed to open any DRM device.
> [sway/server.c] Unable to create backend.
> #+END_SRC
>
>
> So sway is not starting.  I believe this is because my i915 intel
> driver is not loaded.  I know this is the case, because the text on my
> virtual console is LARGE.  $ sudo modprobe i915 loads the required
> driver. And I can now log into sway.
>
> However, my ethernet driver is not loaded.

On IRC, tsmish posted this bisect log:

--8<---------------cut here---------------start------------->8---
 1 git bisect start                                                                                 
 2 # bad: [bfb6c393b91dc4a236678a0682348d5b7bd77193] gnu: gwl: Build with Guile 3.                  
 3 git bisect bad bfb6c393b91dc4a236678a0682348d5b7bd77193                                          
 4 # good: [d98f7fdabe27f3441f317af3e7f5a979edf5d741] remove sane-backends from wine inputs for now 
 5 git bisect good d98f7fdabe27f3441f317af3e7f5a979edf5d741                                         
 6 # good: [505b2631a9c35bbaa5ba6771ad4f646086f23cad] gnu: le-certs: Update input hashes.           
 7 git bisect good 505b2631a9c35bbaa5ba6771ad4f646086f23cad                                         
 8 # bad: [b4e0166e2d7d9d4b57e1caeb026936f957858ec9] gnu: Add rust-quasi-0.32.                      
 9 git bisect bad b4e0166e2d7d9d4b57e1caeb026936f957858ec9                                          
10 # bad: [d46646d9c772fb699ca24a56f815695eecdcb513] gnu: python-blinker: Use HTTPS home page.      
11 git bisect bad d46646d9c772fb699ca24a56f815695eecdcb513                                          
12 # good: [9469ab532fe561b8bb679ba8bf08f1c1f5f9374a] gnu: ddclient: Update home page.              
13 git bisect good 9469ab532fe561b8bb679ba8bf08f1c1f5f9374a                                         
14 # good: [3603f5536ee0223f2e15ca6c518ab922030646dd] gnu: wabt: Use Texinfo mark-up.               
15 git bisect good 3603f5536ee0223f2e15ca6c518ab922030646dd                                         
16 # bad: [205c1e04e04b9a9338c7219ff82bd13f000fb8c8] gnu: shepherd: Update to 0.7.0.                
17 git bisect bad 205c1e04e04b9a9338c7219ff82bd13f000fb8c8                                          
--8<---------------cut here---------------end--------------->8---

What does “cat /proc/sys/kernel/modprobe” return on the broken system?

I would expect 8b9cad01e9619f53dc5a65892ca6a09ca5de3447 to be suspect #1
because it potentially leads to ‘LINUX_MODULE_DIRECTORY’ being unset in
places where it used to be set before.

> Man I love guix system.  It really does work smoothly, even when you
> have problems.  So thanks for making a great GNU/Linux distro!

Heh.  :-)

Ludo’.

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