On Mon, 2003-05-19 at 16:21, Macca .. wrote: > The card works fine with lavrec (from the mjpeg tools) and i can watch video > feeds in xawtv with overlay mode, but when i switch to grab display mode I > get a black picture and: > > the following error message: > > ioctl: VIDIOCMCAPTURE(frame=0;height=288;width=384;format=7): Invalid > argument The kernel can't allocate enough memory. this isn't a problem on your computer, it's simply a hardware issue: the card needs "physically contiguous", and the kernel can only give 256kB (fixed limit). 384x288@16bpp simply doesn't fit in 256kB, so it fails. Resizing the window to a smaller size will make grabdisplay work. You can overcome this problem by installing the bigphysarea patch (see google for links) and recompile the driver after that. Anyway, I don't see any reason why you'd want to use grabdisplay mode, overlay looks a lot better. Ronald
