>Number:         2136
>Category:       port-i386
>Synopsis:       kernels with -O2 break pcvt (at least)
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    gnats-admin (GNATS administrator)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 26 18:35:02 1996
>Last-Modified:
>Originator:     Michael Graff
>Organization:
flame.org:  yes, we do know everything
>Release:        26-Feb-1996
>Environment:
	
System: NetBSD darkwatch.flame.org 1.1A NetBSD 1.1A (DARKWATCH) #0: Mon Feb 26 15:55:39 CST 1996 explorer@packrat.flame.org:/usr/src/sys/arch/i386/compile/DARKWATCH i386


>Description:
It seems that compiling a kernel with -O2 still does not do the right
thing on the i386.  I notice this problem mostly on the i486 I have, but
even the pentathing I also run has screen problems from time to time.

My main concern is that if this is a compiler problem, what else may
be broken, in the kernel or in userland, because of it?
	
>How-To-Repeat:
Varies ; the 486 always has the problem, the pentathing, once in a while,
especially when leaving X or the machine is up for a long time.
	
>Fix:
Compiling a kernel with -O fixes it, or at least appears to hide it.
	
>Audit-Trail:
>Unformatted: