Re: Loading v4l2loopback kernel module

[Stefan Baums]

Dear Michael,

> (operating-system
>   ...
>   (kernel-loadable-modules (list v4l2loopback-linux-module))
>   ... )

thank you, that helped. For good measure, I also kept

   (simple-service 'my-kernel-module-loader-thunderbolt
                   kernel-module-loader-service-type
                   '("thunderbolt"))
   (simple-service 'my-kernel-module-loader-v4l2loopback
                   kernel-module-loader-service-type
                   '("v4l2loopback"))
   (simple-service 'my-kernel-module-loader-zram
                   kernel-module-loader-service-type
                   '("zram"))

Trying to add thunderbolt and zram to your code threw an error. I
suppose the difference is that v4l2loopback comes in its own Guix
package.

Reconfigure rebuilt the kernel then, but unfortunately in the end
failed with the below. What might be going on now?

All best,
Stefan

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The following derivation will be built:
  /gnu/store/ca1iiszjxbshrv6mmdjfra89di5ggcjb-install-bootloader.scm.drv

building 
/gnu/store/ca1iiszjxbshrv6mmdjfra89di5ggcjb-install-bootloader.scm.drv...
guix system: bootloader successfully installed on '(/boot/efi)'
shepherd: Evaluating user expression (and (defined? (quote transient?)) (map (# 
?) ?)).
Backtrace:
In guix/store.scm:
   1320:8 19 (call-with-build-handler _ _)
   1320:8 18 (call-with-build-handler _ _)
   1320:8 17 (call-with-build-handler #<procedure 7fe892daa1b0 at g…> …)
  2129:25 16 (run-with-store #<store-connection 256.99 7fe894270b40> …)
In ice-9/boot-9.scm:
  1747:15 15 (with-exception-handler #<procedure 7fe8929a3bd0 at ic…> …)
In ice-9/exceptions.scm:
   406:15 14 (_)
In ice-9/boot-9.scm:
  1752:10 13 (with-exception-handler _ _ #:unwind? _ # _)
In guix/scripts/system.scm:
   870:15 12 (_)
In guix/store.scm:
  2129:25 11 (run-with-store #<store-connection 256.99 7fe88fb07c30> …)
In guix/scripts/system.scm:
   870:15 10 (_ _)
In guix/scripts/system/reconfigure.scm:
    145:2  9 (_ _)
In guix/scripts/system.scm:
   768:14  8 (_ _)
In ice-9/boot-9.scm:
   222:17  7 (map1 (#<<live-service> provision: (term-tty1) requi…> …))
In ice-9/eval.scm:
   173:55  6 (_ #(#(#<directory (guile-user) 7fe8aa191c80>) #<<liv…>))
   182:19  5 (proc #(#(#<directory (guile-user) 7fe8aa191c80>) #<<…>))
   142:16  4 (compile-top-call #<directory (guile-user) 7fe8aa191c80> …)
In unknown file:
           3 (%resolve-variable (7 . live-service-transient) #<direc…>)
In ice-9/boot-9.scm:
  1685:16  2 (raise-exception _ #:continuable? _)
  1683:16  1 (raise-exception _ #:continuable? _)
  1685:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1685:16: In procedure raise-exception:
error: live-service-transient: unbound variable

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