Hi! it really hangs. seems, that something wrong with memory, maybe. computer hangs on read() request (xawtv). but I do not know (yet) how to get the info. I'm new to driver writing. when looking at the strings with read() in the driver, nothing seems to be illegal (debug printing shows reasonable memory addrs). the orig/ driver really segfaults. so, it is possible, that card or something is not properly initialized. I have 2 cards (simle one and pixelview with TV).