Mouse and Keyboard on MacBook Air mid 2009 don't work partially
I got a workaround to solve this error: Using CMD+R on Boot to access the Recovery Menu, i managed to check and solve Permissions on the SSD. There is one plist that says displayd should have 0 but has 244 (like that)

after solving, it seems to work... for half an hour again. Then i have to force-shutdown and boot into recovery again... The mac is virgin, theres nothing installed besides Firefox and Office '11.

that cant be it, anyone got a solution?