diff -ur OLD/drivers/input/input.c NEW/drivers/input/input.c
--- OLD/drivers/input/input.c	2007-01-26 16:59:36.000000000 +0100
+++ NEW/drivers/input/input.c	2007-01-26 17:04:38.000000000 +0100
@@ -49,6 +49,8 @@
 {
 	struct input_handle *handle;
 
+	dev->last_activity = jiffies;
+
 	if (type > EV_MAX || !test_bit(type, dev->evbit))
 		return;
 
@@ -482,6 +484,30 @@
 	return seq_open(file, &input_devices_seq_ops);
 }
 
+static int input_activity_seq_show(struct seq_file *seq, void *v)
+{
+	struct input_dev *dev = container_of(v, struct input_dev, node);
+
+	seq_printf(seq, "%04x %04x %04x %04x\t%u\n",
+		   dev->id.bustype, dev->id.vendor,
+		   dev->id.product, dev->id.version,
+		   jiffies_to_msecs((long) jiffies - (long) dev->last_activity));
+
+	return 0;
+}
+
+static struct seq_operations input_activity_seq_ops = {
+	.start	= input_devices_seq_start,
+	.next	= input_devices_seq_next,
+	.stop	= input_devices_seq_stop,
+	.show	= input_activity_seq_show,
+};
+
+static int input_proc_activity_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &input_activity_seq_ops);
+}
+
 static struct file_operations input_devices_fileops = {
 	.owner		= THIS_MODULE,
 	.open		= input_proc_devices_open,
@@ -491,6 +517,15 @@
 	.release	= seq_release,
 };
 
+static struct file_operations input_activity_fileops = {
+	.owner		= THIS_MODULE,
+	.open		= input_proc_activity_open,
+	.poll		= input_proc_devices_poll,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
 static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	/* acquire lock here ... Yes, we do need locking, I knowi, I know... */
@@ -558,15 +593,23 @@
 	entry->owner = THIS_MODULE;
 	entry->proc_fops = &input_devices_fileops;
 
-	entry = create_proc_entry("handlers", 0, proc_bus_input_dir);
+	entry = create_proc_entry("activity", 0, proc_bus_input_dir);
 	if (!entry)
 		goto fail2;
 
 	entry->owner = THIS_MODULE;
+	entry->proc_fops = &input_activity_fileops;
+
+	entry = create_proc_entry("handlers", 0, proc_bus_input_dir);
+	if (!entry)
+		goto fail3;
+
+	entry->owner = THIS_MODULE;
 	entry->proc_fops = &input_handlers_fileops;
 
 	return 0;
 
+ fail3:	remove_proc_entry("activity", proc_bus_input_dir);
  fail2:	remove_proc_entry("devices", proc_bus_input_dir);
  fail1: remove_proc_entry("input", proc_bus);
 	return -ENOMEM;
diff -ur OLD/include/linux/input.h NEW/include/linux/input.h
--- OLD/include/linux/input.h	2007-01-26 16:59:38.000000000 +0100
+++ NEW/include/linux/input.h	2007-01-26 17:31:29.000000000 +0100
@@ -949,6 +949,8 @@
 	const char *uniq;
 	struct input_id id;
 
+	unsigned long last_activity;
+	
 	unsigned long evbit[NBITS(EV_MAX)];
 	unsigned long keybit[NBITS(KEY_MAX)];
 	unsigned long relbit[NBITS(REL_MAX)];