Hi I seem to have inherited the position of cpia driver maintainer for the obsolete cpia-chip based webcams... I have been pushing updates for the drivers from http://sourceforge.net/projects/webcam into the 2.4.20 and 2.5.x kernels via Alan Cox. (A lot of work by the original driver authors had never been put into official kernel sources). I am right now trying to get simultaneous viewing of two cpia webcams working if possible with the v4l1 in 2.4.20-rc2 kernel. If two cameras are registered, one on /dev/video0 and one on /dev/video1, and I use e.g. xawtv or gqcam to monitor them, I cannot open /dev/video1 when /dev/video0 is open and vice-versa. This happens for two cpia devices and one cpia + one ov511 device. If I try to start the ov511 device with the cpia one already running, it tries to open, but fails, and the running cpia device also hangs shortly afterwards. Am I running into an intrinsic limitation of v4l1, or does this means something is screwed up in the cpia driver's v4; initialization, or whatever. Unfortunately, I dont have two ov511's to see if that combination works ok with v4l1, assuming that driver is correct. Any suggestions? Should I expect to be able to simultaneously view two webcams with v4l1 if some cpia driver bug can be fixed? Duncan
