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install: Make sure uvesafb can be loaded.

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Fixes <https://issues.guix.gnu.org/60010>.
Reported by pelzflorian (Florian Pelz) <pelzflorian@pelzflorian.de>.

Previously, the 'modprobe' executable would try and fail to load the
module from /lib/modules/*.  Set 'LINUX_MODULE_DIRECTORY' to make sure
'modprobe' looks for the module in the right place.

* gnu/system/install.scm (uvesafb-shepherd-service)[modprobe]: New
variable.
In 'start' method, invoke it instead of KMOD/bin/modprobe.
This commit is contained in:
Ludovic Courtès 2022-12-15 23:54:10 +01:00
parent 047ae5c345
commit b1aef25453
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1 changed files with 12 additions and 1 deletions
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13
gnu/system/install.scm
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@ -284,13 +284,24 @@ (define %nscd-minimal-caches
;; appropriate options. The GUI installer needs it when the machine does not
;; support Kernel Mode Setting. Otherwise kmscon is missing /dev/fb0.
(define (uvesafb-shepherd-service _)
(define modprobe
(program-file "modprobe-wrapper"
#~(begin
;; Use a wrapper because shepherd 0.9.3 won't let us
;; pass environment variables to the child process:
;; <https://issues.guix.gnu.org/60106>.
(setenv "LINUX_MODULE_DIRECTORY"
"/run/booted-system/kernel/lib/modules")
(apply execl #$(file-append kmod "/bin/modprobe")
"modprobe" (cdr (command-line))))))
(list (shepherd-service
(documentation "Load the uvesafb kernel module if needed.")
(provision '(maybe-uvesafb))
(requirement '(file-systems))
(start #~(lambda ()
(or (file-exists? "/dev/fb0")
(invoke #+(file-append kmod "/bin/modprobe")
(invoke #+modprobe
"uvesafb"
(string-append "v86d=" #$v86d "/sbin/v86d")
"mode_option=1024x768"))))