Hello I am asking this question for the second time. Before I was advised to use is_tuned function, but it doesn't work for me I have several cameras connected to MasterVideo card with BT878 chip. Cameras are connected with long cable, and some of them may be dead, so I receive black screen from them. It's okay, I don't really care about that, but BT878 turns on AGC, and pictures from other cameras going all white. That's because cameras are conected thru external multiplexer to one input. Someone advised me to use is_tuned function, but it works only if camera gives syncro signal. Although my cameras are syncing thru power suply cable, I don't have stable picture all the time. FYI: I use 2.2.19 kernel with built-in driver, with my own multiplexer patch. Thank you in advance, Dmitry Alexeyev dmi@xxxxxxxxxx
