--- linux-2.4.3-orig/drivers/char/pc_keyb.c	Wed Apr  4 19:46:42 2001
+++ linux/drivers/char/pc_keyb.c	Sun Apr  8 21:45:37 2001
@@ -404,6 +404,11 @@
 		mouse_reply_expected = 0;
 	}
 	else if(scancode == AUX_RECONNECT){
+		// Under normal operation most mice don't generate 0xAA.
+		// But, Other devices might be unusable with this policy.
+		//  (My mouse easily generates 0xAAs on rapid movements,
+		//   when set to 10 samples/sec.)
+		printk("psaux: reconnect detected(0xaa), sending AUX_ENABLE.\n");
 		queue->head = queue->tail = 0;  /* Flush input queue */
 		__aux_write_ack(AUX_ENABLE_DEV);  /* ping the mouse :) */
 		return;
@@ -420,6 +425,9 @@
 			kill_fasync(&queue->fasync, SIGIO, POLL_IN);
 			wake_up_interruptible(&queue->proc_list);
 		}
+		else
+			// 2K buffer is enough for about 10 sec under normal operations, here.
+			printk("psaux: buffer overflow, byte dropped.\n");
 	}
 #endif
 }
@@ -465,6 +473,11 @@
 			else
 				handle_keyboard_event(scancode);
 		}
+		else
+			// Fixme: Ignoring bytes will de-sync mouse protocol.
+			printk("pc_keyb: %s error (0x%02x), byte ignored(%02x).\n",
+			(status & KBD_STAT_MOUSE_OBF)?"mouse":"kbd",status,scancode);
+
 
 		status = kbd_read_status();
 	}