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Hi, I have recently installed Yosemite on my Medion Akoya E6221 laptop. Spec: i3- 2310M (2330M?) processor, Sandy Bridge, Intel 6 series/C200 chipset. I have generated a ssdt according to the script of Pike R Alpha. I have also managed to create a dsdt with the help of someone else. I have used Chameleon. Enabled drop SSDT, disabled generating C and P states. Everything except the trackpad is fine even powermanagement (sleepmode) until I touch the trackpad. Then - although the trackpad does not function - the keyboard gets blocked. I have to reboot. Now here is an even more strange thing. If I use a dsdt I have extracted on this laptop (but not patched at all) then everything is fine including the trackpad but power management is not there of course. Even if I remove the VoodooPS2Trackpad.kext, the trackpad keeps on working. In fact I have removed all things I could find relating to the trackpad, but that does not bother the trackpad. It keeps on going. So now here are my questions: - How can it be that the trackpad keeps on running if I cannot find a kext/driver referring to the trackpad? - What is wrong with the dsdt file? If I use it the trackpad will not work but touching it only once will block the keyboard until reboot (IRQ conflict?) I have attached the dsdt file which causes the trackpad to malfunction and also ssdt.aml and org.chameleon.Boot.plist. Uhm...: Forgot to tell you that the trackpad pane in system preferences tells me: " Trackpad not found" ... DSDT.aml.zip org.chameleon.Boot.plist.zip ssdt.aml.zip