Loading a kernel module at boot
I have an Intel NUC, and I've compiled a kernel extension to control the LED. It has created a .ko file at /lib/modules/4.15.0-38-generic/updates/dkms/nuc_led.ko (which matches uname -r). Manually loading the extension works great:
sudo modprobe wmi
sudo insmod /lib/modules/4.15.0-38-generic/updates/dkms/nuc_led.ko
echo 'ring,80,blink_medium,green' | sudo tee /proc/acpi/nuc_led > /dev/null
This works.
However the extension is not currently loaded at boot. I would like to put commands to turn the LED on and off in rc.local and rc6.d/ but these are not working, I have to run the modprobe commands manually, and even then my file in rc6.d/ (shown below) is not working - the LED remains on.
What am I doing wrong?
$ cat /etc/rc6.d/zz_led_off.sh
#! /bin/bash
echo 'ring,0,none,off' | sudo tee /proc/acpi/nuc_led > /dev/null
$ ls -la /etc/rc6.d/zz_led_off.sh | grep zz
-rwxr-xr-x 1 root root 79 Nov 9 10:07 zz_led_off.sh
kernel
asked Nov 9 '18 at 10:21
user31415629user31415629
1012
add a comment |
I have an Intel NUC, and I've compiled a kernel extension to control the LED. It has created a .ko file at /lib/modules/4.15.0-38-generic/updates/dkms/nuc_led.ko (which matches uname -r). Manually loading the extension works great:
sudo modprobe wmi
sudo insmod /lib/modules/4.15.0-38-generic/updates/dkms/nuc_led.ko
echo 'ring,80,blink_medium,green' | sudo tee /proc/acpi/nuc_led > /dev/null
This works.
However the extension is not currently loaded at boot. I would like to put commands to turn the LED on and off in rc.local and rc6.d/ but these are not working, I have to run the modprobe commands manually, and even then my file in rc6.d/ (shown below) is not working - the LED remains on.
What am I doing wrong?
$ cat /etc/rc6.d/zz_led_off.sh
#! /bin/bash
echo 'ring,0,none,off' | sudo tee /proc/acpi/nuc_led > /dev/null
$ ls -la /etc/rc6.d/zz_led_off.sh | grep zz
-rwxr-xr-x 1 root root 79 Nov 9 10:07 zz_led_off.sh
kernel
asked Nov 9 '18 at 10:21
user31415629user31415629
1012
why not compile directly into the kernel, instead of being a module?
– Doug Smythies
Nov 9 '18 at 16:18
@DougSmythies I'm not sure what that means, how would I compile it directly into the kernel?
– user31415629
Nov 12 '18 at 15:32
Sorry, I think I was wrong. If I understand correctly, because it isn't part of the kernel code, but rather an extension to it, I don't think direct compile into the kernel is an option.
– Doug Smythies
Nov 12 '18 at 15:51
add a comment |
I have an Intel NUC, and I've compiled a kernel extension to control the LED. It has created a .ko file at /lib/modules/4.15.0-38-generic/updates/dkms/nuc_led.ko (which matches uname -r). Manually loading the extension works great:
sudo modprobe wmi
sudo insmod /lib/modules/4.15.0-38-generic/updates/dkms/nuc_led.ko
echo 'ring,80,blink_medium,green' | sudo tee /proc/acpi/nuc_led > /dev/null
This works.
However the extension is not currently loaded at boot. I would like to put commands to turn the LED on and off in rc.local and rc6.d/ but these are not working, I have to run the modprobe commands manually, and even then my file in rc6.d/ (shown below) is not working - the LED remains on.
What am I doing wrong?
$ cat /etc/rc6.d/zz_led_off.sh
#! /bin/bash
echo 'ring,0,none,off' | sudo tee /proc/acpi/nuc_led > /dev/null
$ ls -la /etc/rc6.d/zz_led_off.sh | grep zz
-rwxr-xr-x 1 root root 79 Nov 9 10:07 zz_led_off.sh
kernel
asked Nov 9 '18 at 10:21
user31415629user31415629
1012
I have an Intel NUC, and I've compiled a kernel extension to control the LED. It has created a .ko file at /lib/modules/4.15.0-38-generic/updates/dkms/nuc_led.ko (which matches uname -r). Manually loading the extension works great:
sudo modprobe wmi
sudo insmod /lib/modules/4.15.0-38-generic/updates/dkms/nuc_led.ko
echo 'ring,80,blink_medium,green' | sudo tee /proc/acpi/nuc_led > /dev/null
This works.
However the extension is not currently loaded at boot. I would like to put commands to turn the LED on and off in rc.local and rc6.d/ but these are not working, I have to run the modprobe commands manually, and even then my file in rc6.d/ (shown below) is not working - the LED remains on.
What am I doing wrong?
$ cat /etc/rc6.d/zz_led_off.sh
#! /bin/bash
echo 'ring,0,none,off' | sudo tee /proc/acpi/nuc_led > /dev/null
$ ls -la /etc/rc6.d/zz_led_off.sh | grep zz
-rwxr-xr-x 1 root root 79 Nov 9 10:07 zz_led_off.sh
kernel
kernel
asked Nov 9 '18 at 10:21
user31415629user31415629
1012
asked Nov 9 '18 at 10:21
user31415629user31415629
1012
asked Nov 9 '18 at 10:21
user31415629user31415629
1012
asked Nov 9 '18 at 10:21
user31415629user31415629
1012
asked Nov 9 '18 at 10:21
user31415629user31415629
1012
1012
why not compile directly into the kernel, instead of being a module?
– Doug Smythies
Nov 9 '18 at 16:18
@DougSmythies I'm not sure what that means, how would I compile it directly into the kernel?
– user31415629
Nov 12 '18 at 15:32
Sorry, I think I was wrong. If I understand correctly, because it isn't part of the kernel code, but rather an extension to it, I don't think direct compile into the kernel is an option.
– Doug Smythies
Nov 12 '18 at 15:51
add a comment |
why not compile directly into the kernel, instead of being a module?
– Doug Smythies
Nov 9 '18 at 16:18
@DougSmythies I'm not sure what that means, how would I compile it directly into the kernel?
– user31415629
Nov 12 '18 at 15:32
Sorry, I think I was wrong. If I understand correctly, because it isn't part of the kernel code, but rather an extension to it, I don't think direct compile into the kernel is an option.
– Doug Smythies
Nov 12 '18 at 15:51
why not compile directly into the kernel, instead of being a module?
– Doug Smythies
Nov 9 '18 at 16:18
why not compile directly into the kernel, instead of being a module?
– Doug Smythies
Nov 9 '18 at 16:18
@DougSmythies I'm not sure what that means, how would I compile it directly into the kernel?
– user31415629
Nov 12 '18 at 15:32
@DougSmythies I'm not sure what that means, how would I compile it directly into the kernel?
– user31415629
Nov 12 '18 at 15:32
Sorry, I think I was wrong. If I understand correctly, because it isn't part of the kernel code, but rather an extension to it, I don't think direct compile into the kernel is an option.
– Doug Smythies
Nov 12 '18 at 15:51
Sorry, I think I was wrong. If I understand correctly, because it isn't part of the kernel code, but rather an extension to it, I don't think direct compile into the kernel is an option.
– Doug Smythies
Nov 12 '18 at 15:51
add a comment |
1 Answer
1
active
oldest
votes
Add the module to /etc/modules, in this case, add the following two lines:
wmi
nuc_led
answered Jan 3 at 16:34
user31415629user31415629
1012
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Add the module to /etc/modules, in this case, add the following two lines:
wmi
nuc_led
answered Jan 3 at 16:34
user31415629user31415629
1012
add a comment |
Add the module to /etc/modules, in this case, add the following two lines:
wmi
nuc_led
answered Jan 3 at 16:34
user31415629user31415629
1012
add a comment |
Add the module to /etc/modules, in this case, add the following two lines:
wmi
nuc_led
answered Jan 3 at 16:34
user31415629user31415629
1012
Add the module to /etc/modules, in this case, add the following two lines:
wmi
nuc_led
answered Jan 3 at 16:34
user31415629user31415629
1012
answered Jan 3 at 16:34
user31415629user31415629
1012
answered Jan 3 at 16:34
user31415629user31415629
1012
answered Jan 3 at 16:34
user31415629user31415629
1012
1012
add a comment |
add a comment |
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why not compile directly into the kernel, instead of being a module?
– Doug Smythies
Nov 9 '18 at 16:18
@DougSmythies I'm not sure what that means, how would I compile it directly into the kernel?
– user31415629
Nov 12 '18 at 15:32
Sorry, I think I was wrong. If I understand correctly, because it isn't part of the kernel code, but rather an extension to it, I don't think direct compile into the kernel is an option.
– Doug Smythies
Nov 12 '18 at 15:51