On May 18, 2012, at 7:26 AM, ramazan firin wrote: > when i start driver, it says input/output error.. What is the exact error message? > i try for all upstype values, but i dont work. genericups is only for contact-closure UPSes. What protocol does your UPS use? (I have not heard of this brand, or T-mon.) -- Charles Lepple clepple at gmail