UPDATE I upgraded to the latest RH ES4 kernel 2.6.9-22.0.1.EL and exactly the same issues as with the 2.6.9-5 so I don't think this is something I am doing wrong. As I said, this works perfectly with 2.4.22-1 kernels on the very same hardware so I know there is support for pwm on the server. Has anyone been successful on doing this with 2.6? ------- Previous email.. Guys, any help on this will be appreciated as this servers are a bit too loud and I really need to lower the fans speed. On the very same hardware and 2.4.22-1 kernel (FC1) I used to be able to control them before by doing echo "0.2 32.0 98.0 1.0 .0.0" > /proc/sys/dev/sensors/`/bin/ls -1 /proc/sys/dev/sensors | grep -v eeprom | grep -v chips | tail -1 `/pwm2_cfg Now with 2.6 I have related files under /sys/bus/i2c/devices/0-002e but cannot control the speed. [root at andeya1 0-002e]# ls -l fan* -r--r--r-- 1 root root 4096 Nov 9 00:07 fan1_input -rw-r--r-- 1 root root 0 Nov 9 00:07 fan1_min -rw-r--r-- 1 root root 4096 Nov 9 00:07 fan1_pwm -r--r--r-- 1 root root 4096 Nov 9 00:07 fan1_pwm_enable -r--r--r-- 1 root root 4096 Nov 9 00:07 fan2_input -rw-r--r-- 1 root root 0 Nov 9 00:07 fan2_min -rw-r--r-- 1 root root 4096 Nov 9 00:07 fan2_pwm -r--r--r-- 1 root root 4096 Nov 9 00:07 fan2_pwm_enable -r--r--r-- 1 root root 4096 Nov 9 00:07 fan3_input -rw-r--r-- 1 root root 0 Nov 9 00:07 fan3_min -rw-r--r-- 1 root root 4096 Nov 9 00:07 fan3_pwm -r--r--r-- 1 root root 4096 Nov 9 00:07 fan3_pwm_enable -r--r--r-- 1 root root 4096 Nov 9 00:07 fan4_input -rw-r--r-- 1 root root 4096 Nov 9 00:07 fan4_min If I do a echo "32" > fan1_pwm it does not give any errors, but it does not change the value. While running ./pwmconfig I get the following. 0-002e/fan1_pwm ./pwmconfig: line 102: 0-002e/fan1_pwm_enable: Permission denied 0-002e/fan2_pwm ./pwmconfig: line 102: 0-002e/fan2_pwm_enable: Permission denied 0-002e/fan3_pwm ./pwmconfig: line 102: 0-002e/fan3_pwm_enable: Permission denied Thanks Paul Aviles
