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);
}