This fix by Paul Anderson and Pontus Lidman.

Fixes server hang on systems with no PS/2 controller.

--- xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_io.c       2001/08/06 20:51:11   3.20

+++ xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_io.c       2001/09/25 08:04:26

@@ -34,6 +34,8 @@

 #include "xf86Priv.h"

 #include "xf86_OSlib.h"

+#define KBC_TIMEOUT 250        /* Timeout in ms for sending to keyboard controller */

+

 void

 xf86SoundKbdBell(int loudness, int pitch, int duration)

 {

@@ -140,6 +142,7 @@

 #endif

 {

   int i;

+  int timeout;

   int         value = 0x7f;    /* Maximum delay with slowest rate */

 #ifdef __sparc__

@@ -193,10 +196,18 @@

       value |= i << 5;

       break;

     }

+

+  timeout = KBC_TIMEOUT;

+  while (((inb(0x64) & 2) == 2) && --timeout)

+       usleep(1000); /* wait */

-  while ((inb(0x64) & 2) == 2); /* wait */

+  if (timeout == 0)

+      return;

+

   outb(0x60, 0xf3);             /* set typematic rate */

-  while ((inb(0x64) & 2) == 2); /* wait */

+  while (((inb(0x64) & 2) == 2) && --timeout)

+       usleep(1000); /* wait */

+

   usleep(10000);

   outb(0x60, value);