fix udev rules

resource/linux/60-fan-control.rules

@@ -1,2 +1,7 @@
 
-KERNEL=="hwmon7", SUBSYSTEM=="hwmon", TAG+="uaccess"
+# XXX: Only hwmon7 because it failed on all other number on machine
+SUBSYSTEM=="hwmon", KERNEL=="hwmon7", RUN+="/bin/sh -c '/bin/chmod a+w /sys%p/pwm*'"
+
+
+# LOGS VERSION
+# SUBSYSTEM=="hwmon", KERNEL=="hwmon7", RUN+="/bin/sh -c '/bin/chmod -v a+w /sys%p/pwm* > /tmp/fan-control-udev.txt 2>&1'"

resource/linux/rules-note.md

@@ -0,0 +1,60 @@
+# Some notes on udev rules
+
+### see some logs:
+```sh
+journalctl -f
+```
+
+### reload
+```sh
+sudo udevadm control --reload-rules && sudo udevadm trigger
+```
+
+### show info about triggering and devices (test the hwmon7 device ?)
+```sh
+sudo udevadm test /sys/class/hwmon/hwmon7
+```
+
+### show info 
+```sh
+udevadm monitor -u | grep hwmon
+```
+
+## Other
+```sh
+ll /sys/class/hwmon/hwmon7/pwm*
+sudo /bin/chmod a-w /sys/class/hwmon/hwmon7/pwm*
+cat /tmp/fan-control-udev.txt
+wget https://openrgb.org/releases/release_0.9/60-openrgb.rules
+```
+
+- `TAG+="uaccess"` is not enough on my PC.
+- `chmod g+w` is not enough on my PC.
+- only the hwmon7 seems to be relevant on my PC.
+- hwmon7 is the kernel name. It can be refered as %k in the rules file.
+- %p is the device path. For example, the device path of hwmon7 (`/sys/class/hwmon/hwmon7`) is `/sys/devices/platform/nct6775.656/hwmon/hwmon7`
+
+
+
+`ACTION=="add"`: the rule will only be triggered when a device is added to the system
+`KERNEL=="hwmon[0-99]"`: match any version of hwmon kernel name
+
+### Export log to a file in a RUN clause
+```
+RUN+="/bin/sh -c '{COMMAND} > /tmp/fan-control-udev.txt 2>&1'"
+```
+
+`chmod a+w /sys%p/pwm*`: The * will only make sense in a shell program, that why we spawn /bin/sh before
+
+### Attempt to filter pwmX and pwmX_enable
+
+This two files are the only one that the app use.
+The regex and command work in a terminal on my machine, but don't work inside a RUN clause. 
+```
+SUBSYSTEM=="hwmon", KERNEL=="hwmon7", RUN+="/bin/sh -c '/bin/find /sys%p -type f -regex '/sys%p/pwm[0-99]\(_enable\)?' -exec /bin/chmod a+w {} \; > /tmp/fan-control-udev.txt 2>&1'"
+```
+
+
+### path for rules:
+- /etc/udev/rules.d/60-fan-control.rules
+- /usr/lib/udev/rules.d/60-fan-control.rules