This is a temporary work-around Mike Westerhof for this bug:
http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=788

See also
http://lists.openmoko.org/pipermail/openmoko-kernel/2008-February/000804.html

(It's the 2nd option.)

We may settle on a different solution in the future, depending on
feedback from upstream.

Index: linux-2.6.24/drivers/serial/s3c2410.c
===================================================================
--- linux-2.6.24.orig/drivers/serial/s3c2410.c
+++ linux-2.6.24/drivers/serial/s3c2410.c
@@ -1717,9 +1717,18 @@
 s3c24xx_serial_console_putchar(struct uart_port *port, int ch)
 {
 	unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON);
+	unsigned int umcon = rd_regl(cons_uart, S3C2410_UMCON);
+
+	/* If auto HW flow control enabled, temporarily turn it off */
+	if (umcon & S3C2410_UMCOM_AFC)
+		wr_regl(port, S3C2410_UMCON, (umcon & !S3C2410_UMCOM_AFC));
+
 	while (!s3c24xx_serial_console_txrdy(port, ufcon))
 		barrier();
 	wr_regb(cons_uart, S3C2410_UTXH, ch);
+
+	if (umcon & S3C2410_UMCOM_AFC)
+		wr_regl(port, S3C2410_UMCON, umcon);
 }
 
 static void