Hallo lm-sensors-list. Long time ago I adapted a simple Program named varyfan to the use of sysfs. Since I did it the first time, I had to adapt many things over the time again and again, because there were many changes in the i2c part of sysfs. Now I again installed the current kernel onto my machine and nothing of my stuff works any more. There were adaptions made in the kernel code again, I think. No Problem, but as I wanted to read the documentation in the kernel sources I found some black-holes ;-) porting-clients says: Use the file names specified in Documentation/i2c/sysfs-interface But this file does not exist in the Tree since 2.6.13 . So you see... I need help... since I don't want to use old informations from 2.6.12 kernel tree to adapt to an already changed interface. To which (future) point in time do you see some convergence in the interface. Why do you generally ever touch a running system? Never the less... Thanks for your work in this field Greetings and Thanks -- Dominik J?rgens <d.juergens at tu-bs.de>