>Number:         7870
>Category:       port-mac68k
>Synopsis:       Keystrokes duplicated on console in system under heavy load
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    port-mac68k-maintainer (NetBSD/mac68k Portmaster)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jun 27 17:05:00 1999
>Last-Modified:
>Originator:     Bob Nestor
>Organization:
>Release:        Release 1.4 mac68k
>Environment:
NetBSD pluto 1.4 NetBSD 1.4 (GENERICSBC) #0: Sat May  8 20:55:03 PDT 1999     root2@c610:/usr/src/sys/arch/mac68k/compile/GENERICSBC mac68k

>Description:
console keyboard input is sometimes duplicated when the system is under heavy Serial load?  Typing "abc" will sometimes show up as "aabbc".
The problem may also occur with other non-serial interrupt load on the system.
Allen Briggs reports being able to duplicate the problem as follows:
"Q700 under heavy disk and reasonable ethernet
load (20MB machine with two disks running about 12 copies of
'ls -lasR / > /dev/null 2>&1 &' and a 'ping -n -s 32760 xx.xx.xx.xx')."
He is running with the new AU/X interrupt scheme, my system is running with
the interrupt scheme in the 1.4 release kernel.


>How-To-Repeat:
Provide a heavy interrupt load on the system with Serial Port activity,
ethernet, disk, etc. Editing a file on the console will usually show the
problem, although it doesn't occur with every keystroke.  I'm seeing it
happen in about one out of 50 keystrokes.

>Fix:
Unknown

>Audit-Trail:
>Unformatted: