Patch-ID# 100232-02
Keywords: crash, cpu, screen, black, sparcstation 2, sunos, 4.1.1
Synopsis: SunOS 4.1.1: Sparcstation 2 crashes or whatchdog resets
Date: 06/Dec/91
 
SunOS release: 4.1.1, 4.1.1GFX-Rev.2
 
Unbundled Product: 
 
Unbundled Release:
 
Topic: Sparcstation 2, SS2, crash, blank, screen, powercycle
 
BugId's fixed with this patch: 1050558

Architectures for which this patch is available: sun4c

Patches which may conflict with this patch: 100126 100330

Obsoleted by: 4.1.2

Problem Description:
Large applications that run fine under SunOS 4.1.1 on the SS-1  / SS-1+ and
other SUN4 machines, crash the SS-2 machine running SunOS 4.1.1.  

The symptoms are:

	screen goes black
	cpu light goes out
	L1-A does not work
	user typically has to power the machine off and restart machine again
	watchdog reset

NOTE:
there is a separate version of this patch for SS-2 machines running
4.1.1GFX-Rev.2; see INSTALL below.

INSTALL:
   If you're installing the patch for 4.1.1 cd to the sun4c/4.1.1 subdirectory;
   If you're installing the patch for 4.1.1GFX-Rev.2 cd to the 
	sun4c/4.1.1GFX-Rev.2 subdirectory.

   Then, as root install the sun4c patches as follows:

      #  mv /sys/sun4c/OBJ/machdep.o /sys/sun4c/OBJ/machdep.o.orig
      #  mv /sys/sun4c/OBJ/locore.o /sys/sun4c/OBJ/locore.o.orig
      #  cp sun4c/{4.1.1, 4.1.1GFX-Rev.2}/machdep.o /sys/sun4c/OBJ/machdep.o
      #  cp sun4c/{4.1.1, 4.1.1GFX-Rev.2}/locore.o /sys/sun4c/OBJ/locore.o
      #  chmod 444 /sys/sun4c/OBJ/machdep.o
      #  chmod 444 /sys/sun4c/OBJ/locore.o


   Then a new kernel will need to be made and installed.
 Please refer to the System and Network Administration manual
 for installing a custom kernel.