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Debian Led

Page history last edited by Wesha 10 years, 2 months ago

This article describes, how to enable the leds:


First obtain the kernel sources


 ss4200:# apt-get install linux-source-2.6.26

 ss4200:# cd /usr/src

 ss4200:/usr/src/linux-source-2.6.26# tar xvjf linux-source-2.6.26.tar.bz2

 ss4200:/usr/src# wget http://merkel.debian.org/~jurij/2.6.26-2/i386/config-2.6.26-1-686.gz                    #obtain standart kernel config

 ss4200:/usr/src# gunzip config-2.6.26-1-686.gz

 ss4200:/usr/src# mv config-2.6.26-1-686 .config

 ss4200:/usr/src# cd

 ss4200:/usr/src/linux-source-2.6.26# cd linux-source-2.6.26

 ss4200:/usr/src/linux-source-2.6.26# mv ../.config .

 ss4200:/usr/src/linux-source-2.6.26# make oldconfig


Answer all questions with yes


apply the patch from here.  It will hopefully be in the mainline kernel soon.


Brigtness control:


Load the i2c dme1737 smbus driver if not already loaded or built in.

# modprobe dme1737
# lsmod | grep dme
dme1737                39501  0 
hwmon_vid               3082  1 dme1737
hwmon                   1936  2 coretemp,dme1737
i2c_core               23284  2 dme1737,i2c_i801
# cd /sys/bus/i2c/drivers/dme1737/0-002e/
# chmod o+w pwm5
# echo 10 > pwm5
# sleep 5
# echo 255 > pwm5

You'll see the lights get dim then bright again.  These pwm outputs are
normally used for fans, but I guess they commandeered it to control the
LEDs in this case.  

Comments (3)

andrey said

at 4:09 am on Dec 14, 2009

sorry, but the instruction is not clear for me.
what are an exact steps needs to be done after 'make oldconfig'?
I successfully installed Debian 5.0.3 on my ss4200 and would like to disable power led blinking and to control leds brightness. It is possible?

andrey said

at 4:37 am on Dec 14, 2009

oops, I already found this one http://groups.google.com/group/ss4200/browse_thread/thread/bf46358c52b02f70#

But the questions are:
- what steps needs after 'make oldconfig'?
- And regarding to brightness control. My lsmod output
bigbox:/usr/src# lsmod |grep dme
dme1737 28988 0
hwmon_vid 2720 1 dme1737
i2c_core 19828 2 dme1737,i2c_i801
and I don't have cd /sys/bus/i2c/drivers/dme1737/0-002e/pwm5 file.
ls -la /sys/bus/i2c/drivers/dme1737/
total 0
drwxr-xr-x 2 root root 0 2009-12-13 23:18 .
drwxr-xr-x 4 root root 0 2009-12-13 23:18 ..
--w------- 1 root root 4096 2009-12-13 23:18 bind
lrwxrwxrwx 1 root root 0 2009-12-13 23:18 module -> ../../../../module/dme1737
--w------- 1 root root 4096 2009-12-13 23:18 uevent
--w------- 1 root root 4096 2009-12-13 23:18 unbind
What I do wrong?

Thank you in advance!

Ronald Pottol said

at 10:08 am on Jan 27, 2010

There is no brightness control, at least that's what http://lkml.org/lkml/2009/9/15/425 says in the notes for the driver. Ask the author nicely? Learn C and do it yourself?

Hey, at least they work. Brightness would be nifty though (say, load, or iostat, or something for input?).

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