Solved: Where is the ACT led file?

[SOLVED] Where is the ACT led file? - Printable Version

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Where is the ACT led file? - kusti8 - 29th Nov, 2014 08:35 AM

I wanted for the ACT led to flash when a button was pressed. While I was following a tutorial, it said to change files in /sys/class/leds/led0. The files are brightness which holds a 1 or a 0 and trigger and others also. Where would that file be in xbian?

RE: Where is the ACT led file? - CurlyMo - 29th Nov, 2014 09:14 AM

If you are looking for missing functionality (especially in sysfs), look for modules first. I honestly didn't know about this functionality so i did as well:

Code:

root@pi ~ # find /lib -name led*

/lib/modules/3.15.8+/kernel/drivers/leds

/lib/modules/3.15.8+/kernel/drivers/leds/trigger/ledtrig-camera.ko

/lib/modules/3.15.8+/kernel/drivers/leds/trigger/ledtrig-transient.ko

/lib/modules/3.15.8+/kernel/drivers/leds/led-class.ko

/lib/modules/3.15.8+/kernel/drivers/leds/leds-gpio.ko

Code:

root@pi ~ # modprobe leds-gpio

And tadaa:

Code:

root@pi ~ # ls /sys/class/leds/led0/

brightness  device  max_brightness  subsystem  trigger  uevent

RE: Where is the ACT led file? - kusti8 - 30th Nov, 2014 01:20 AM

(29th Nov, 2014 09:14 AM)CurlyMo Wrote: If you are looking for missing functionality (especially in sysfs), look for modules first. I honestly didn't know about this functionality so i did as well:

Code:

root@pi ~ # find /lib -name led* /lib/modules/3.15.8+/kernel/drivers/leds /lib/modules/3.15.8+/kernel/drivers/leds/trigger/ledtrig-camera.ko /lib/modules/3.15.8+/kernel/drivers/leds/trigger/ledtrig-transient.ko /lib/modules/3.15.8+/kernel/drivers/leds/led-class.ko /lib/modules/3.15.8+/kernel/drivers/leds/leds-gpio.ko

Code:

root@pi ~ # modprobe leds-gpio

And tadaa:

Code:

root@pi ~ # ls /sys/class/leds/led0/ brightness device max_brightness subsystem trigger uevent

Thanks, you learn something new every day! One comment, to anybody else doing this: I had to run modprobe from /sbin

RE: Where is the ACT led file? - rikardo1979 - 30th Nov, 2014 02:16 AM

(30th Nov, 2014 01:20 AM)kusti8 Wrote:
(29th Nov, 2014 09:14 AM)CurlyMo Wrote: If you are looking for missing functionality (especially in sysfs), look for modules first. I honestly didn't know about this functionality so i did as well:

Code:

root@pi ~ # find /lib -name led* /lib/modules/3.15.8+/kernel/drivers/leds /lib/modules/3.15.8+/kernel/drivers/leds/trigger/ledtrig-camera.ko /lib/modules/3.15.8+/kernel/drivers/leds/trigger/ledtrig-transient.ko /lib/modules/3.15.8+/kernel/drivers/leds/led-class.ko /lib/modules/3.15.8+/kernel/drivers/leds/leds-gpio.ko

Code:

root@pi ~ # modprobe leds-gpio

And tadaa:

Code:

root@pi ~ # ls /sys/class/leds/led0/ brightness device max_brightness subsystem trigger uevent

Thanks, you learn something new every day! One comment, to anybody else doing this: I had to run modprobe from /sbin

nice one, so all sorted now? if yes, can you please edit prefix of the thread to [Solved]? thanks