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@harmathy I'm using the modconf hook, maybe the systemd modules are at fault here?

HOOKS=(systemd autodetect microcode modconf kms plymouth keyboard sd-vconsole block sd-encrypt filesystems fsck)

The configuration from modprobe.d takes effect when manually reloading the module using modprobe, just not at startup.

@gwuensch: it seems like the parameter is not required for all models. For me the service only fails if I explicitly set the parameter to 0. Can you check your /etc/mkinitcpio.conf for the modconf hook which, as far as I understand mkinitcpio hooks, should handle the parameter?

@gwuensch: I also had to use this kernel boot parameter as modprobe.d did not work (but manually unloading and reloading using modprobe worked). I don't use encrypted root, so the reason must be something else.

On another note, I had to use thinkpad_acpi.fan_control=1 as kernel parameter to successfully enable fan control. The module is loaded very early (utilizing a modalias), seemingly too early for the options from modprobe.d to take effect.

I'm surprised that besides @ruaeci no one else reported this issue. I think the most likely candidate is my encrypted root partition, which is only mounted after thinkpad_acpi is loaded. Would be nice if someone with a similiar setup can confirm this :)

Thanks for fixing this quickly :D

good catch, gwuensch!

The override.conf is not installed correctly. It should be like this:

diff --git a/PKGBUILD b/PKGBUILD
index 08f37ee..987fc7f 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -42,7 +42,7 @@ package() {
   install -D -m644 "$pkgname".1 "$pkgdir"/usr/share/man/man1
   install -D -m644 "$pkgname".conf.5 "$pkgdir"/usr/share/man/man5
   install -D -m644 "$srcdir/$pkgname".service rcscripts/systemd/thinkfan-{sleep,wakeup}.service "$pkgdir"/usr/lib/systemd/system
-  install -D -m644 rcscripts/systemd/override.conf "$pkgdir"/usr/lib/systemd/system/thinkfan.service.d
+  install -D -m644 rcscripts/systemd/override.conf "$pkgdir"/usr/lib/systemd/system/thinkfan.service.d/override.conf
   install -D -m644 "$srcdir"/thinkpad_acpi.conf "$pkgdir"/usr/lib/modprobe.d
 }

@Martchus thanks! Yeah, I also recognized that when running namcap. I now fixed all problems it detected.

Looks like a dependency is missing:

CMake Error at CMakeLists.txt:130 (message):
  USE_LM_SENSORS enabled but libsensors not found.  Please install
  libsensors-dev!

Maybe this is provided by lm_sensors which then shouldn't be optional.

@FrederickZh thanks for the backport