diff -Naur ivtv-0.2.0-rc3k.orig/driver/ivtv-ioctl.c ivtv-0.2.0-rc3k/driver/ivtv-ioctl.c
--- ivtv-0.2.0-rc3k.orig/driver/ivtv-ioctl.c	2005-03-18 23:24:14 +0100
+++ ivtv-0.2.0-rc3k/driver/ivtv-ioctl.c	2005-09-12 08:59:45 +0200
@@ -1494,6 +1494,15 @@
 int ivtv_v4l2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 		                unsigned long arg)
 {
+	printk("DJW:ivtv_v4l2_ioctl: ivtv_debug=0x%02X\n" ivtv_debug);
+	if ((IVTV_DEBUG_IOCTL) & ivtv_debug) {
+		unsigned int dir = cmd >> _IOC_DIRSHIFT & _IOC_DIRMASK;
+		unsigned int type = cmd >> _IOC_TYPESHIFT & _IOC_TYPEMASK;
+		unsigned int nr = cmd >> _IOC_NRSHIFT & _IOC_NRMASK;
+		unsigned int size = cmd >> _IOC_SIZESHIFT & _IOC_SIZEMASK;
+        	printk("ivtv_v4l2_ioctls: cmd=0x%08X, dir=%u, type='%c'', nr=%u, size=%u\n", cmd, dir, type, nr, size);
+	}
+
        	/* Converts old (0.1.9) non-conforming ioctls that were using
 	   'just some values I picked for now'. I hoped this would not be
 	   necessary, but too many people were already using existing apps