>We've got a system locking up in an odd fashion, and before sending a
>component off for the wrong repair thought we'd check out to see if
>anyone else is having a similar problem.
>We have a SLC which periodically freezes up with respect to the
>keyboard and mouse. It's completely accessible from the outside, and
>all relevant processes show themselves in input wait state. An echo to
>/dev/console shows up properly.
>The system can only be reset by physically detaching and reattaching
>the keyboard. The system does not detect the detach, but does break
>back to the prom monitor on reattach of the keyboard. You can then
>continue with a `C' command.
>My guess is either bad keyboard or bad serial chip. Anybody had a similar
>problem and/or solution?
Responses came from:
Michael Assels <firstname.lastname@example.org>
Pam Skillman <email@example.com>
firstname.lastname@example.org (Ian MacPhedran)
Ike Stoddard <email@example.com>
Mike Raffety <firstname.lastname@example.org>
Geert Jan de Groot <email@example.com>
Many thanks to all. The responses were suggestions, hints to look
other places, or requests for a summary. Unfortunately the suggestions
were contradictory, leading me to think there are a number of failures
which could cause the symptoms. We swapped the keyboard for one of our
spares, and the problem has not recurred. If it does, we'll try these
From: Pam Skillman <firstname.lastname@example.org>
>You don't say if you are in X [[ we're in OW2 --scs ]] when this
>happens, but we have had similar problems with X11R5 and SUNOS 4.1.2
>(not sure if it happens with other releases) where the keyboard locks
>up, but everything else (remote access to the machine is fine). You
>can login to the machine and use the command 'kbd_mode -a' to clear the
>problem and unhang the keyboard. There are other options to this X
>command (kbd_mode) that may help. I'm not sure if this is your
>problem, but it's worth a try I guess. Good Luck!!
From: email@example.com (Ian MacPhedran)
>This also happens when someone uses ^S (xoff) on the console - try using
>^Q (xon) and see what happens ...
From: Geert Jan de Groot <firstname.lastname@example.org>
>Probably keyboard. You can detach the mouse to check. Swap them with
Ike Stoddard STODDARD@DRAPER.COM
>Hmmmm. Sometimes similar phenomena appear on my SS2. Is the xnews
>server hogging the CPU? Are you running OW3.0 (as I am) or SunView?
>I've had to telnet in over ethernet and kill "xnews -cubesize large"
>to get my entire console back. I suspect you've already ruled this
>out, but just in case, this was my $0.02 worth....
Nope, we can log into the system from outside and load is at zero.
From: Mike Raffety <email@example.com>
>What you're doing is equivalent to hitting "break" on a server. Does
>L1-A work? I suspect it may ... What SunOS are you running?
No it doesn't -- we're getting no keyboard response at all. Running
From: Michael Assels <firstname.lastname@example.org>
>We have the identical problem with an IPC. I'm sorry I can't give you the
>solution, but I can narrow it down: Exchanging the keyboard (type 4) with
>a keyboard from another IPC doesn't help. The problem remains on the same
>machine, so it's not the keyboard.
Worked for us, leading me to believe we're dealing with a different
This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:07:20 CDT