diff -urdpNX /usr/share/dontdiff -x Makefile linux-2.6.19.vanilla/drivers/serial/8250.c linux-2.6.19/drivers/serial/8250.c
--- linux-2.6.19.vanilla/drivers/serial/8250.c	2006-12-19 20:18:26.000000000 +0300
+++ linux-2.6.19/drivers/serial/8250.c	2006-12-19 19:53:04.000000000 +0300
@@ -1548,7 +1548,7 @@ static int serial8250_startup(struct uar
 
 	if (up->port.type == PORT_16C950) {
 		/* Wake up and initialize UART */
-		up->acr = 0;
+		up->acr = port->initial_acr;
 		serial_outp(up, UART_LCR, 0xBF);
 		serial_outp(up, UART_EFR, UART_EFR_ECB);
 		serial_outp(up, UART_IER, 0);
@@ -2599,6 +2599,7 @@ int serial8250_register_port(struct uart
 		uart->port.iotype   = port->iotype;
 		uart->port.flags    = port->flags | UPF_BOOT_AUTOCONF;
 		uart->port.mapbase  = port->mapbase;
+		uart->port.initial_acr = port->initial_acr;
 		if (port->dev)
 			uart->port.dev = port->dev;
 
diff -urdpNX /usr/share/dontdiff -x Makefile linux-2.6.19.vanilla/drivers/serial/8250.h linux-2.6.19/drivers/serial/8250.h
--- linux-2.6.19.vanilla/drivers/serial/8250.h	2006-12-19 20:44:12.000000000 +0300
+++ linux-2.6.19/drivers/serial/8250.h	2006-12-19 20:28:29.000000000 +0300
@@ -29,6 +29,8 @@ struct old_serial_port {
 	unsigned short iomem_reg_shift;
 };
 
+#define initial_acr unused[0]
+
 /*
  * This replaces serial_uart_config in include/linux/serial.h
  */