diff -u --new-file --exclude-from ../exclude --recursive linux.vanilla/drivers/char/serial.c linux.15p6/drivers/char/serial.c
--- linux.vanilla/drivers/char/serial.c	Tue Jan  4 21:18:46 2000
+++ linux.15p6/drivers/char/serial.c	Tue Jan 18 01:03:46 2000
@@ -1383,8 +1383,13 @@
 	if (info->state->type == PORT_16750)
 		serial_outp(info, UART_FCR, fcr); 	/* set fcr */
 	serial_outp(info, UART_LCR, cval);		/* reset DLAB */
-	if (info->state->type != PORT_16750)
+	if (info->state->type != PORT_16750) {
+		if (fcr & UART_FCR_ENABLE_FIFO) {
+			/* emulated UARTs (Lucent Venus 167x) need two steps */
+			serial_outp(info, UART_FCR, UART_FCR_ENABLE_FIFO);
+		}
 		serial_outp(info, UART_FCR, fcr); 	/* set fcr */
+	}
 	restore_flags(flags);
 }