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Bug 7943 - ^Z and ^C do not work on serial console under sparc linux, 2.2.12+
Summary: ^Z and ^C do not work on serial console under sparc linux, 2.2.12+
Status: CLOSED DUPLICATE of bug 9948
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: kernel
Version: 6.1
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Michael K. Johnson
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 1999-12-22 01:13 UTC by trockij
Modified: 2008-05-01 15:37 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2000-03-04 18:03:01 UTC

Attachments (Terms of Use)

Description trockij 1999-12-22 01:13:17 UTC
Date: Mon, 13 Dec 1999 17:47:48 -0800 (PST)
From: Jim Trocki <>
Subject: serial console strangeness on sparclinux

I'm using the first serial port on an Ultra1 for the console, running
sparclinux 2.2.14pre12, and certain keys are ignored, such as ^C
and ^Z. Here is some info:

[root@diy /root]# uname -a
Linux 2.2.14pre12 #3 Fri Dec 10 07:38:40 PST 1999 sparc64

[root@diy /root]# tty
[root@diy /root]# ls -l /dev/console
crw-------   1 root     tty        5,   1 Dec 13 17:39 /dev/console

[root@diy /root]# stty sane

[root@diy /root]# stty -a
speed 9600 baud; rows 0; columns 0; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; start = ^Q; stop = ^S; susp = ^Z; dsusp = ^Y; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O;
-parenb -parodd cs8 hupcl -cstopb cread clocal -crtscts
-ignbrk brkint ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon
-iuclc -ixany imaxbel
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt
echoctl echoke

Any ideas? ^S and ^Q work, so does ^D, but ^Z and ^C do nothing.

If I telnet to the machine, then all the above keys function as
expected--it's only over the serial console am I having problems.

I'm using the stock RH6.1 distribution. I get the same behavior using
the 2.2.12-42 which comes with RHAT.

Here is some more info from /etc/inittab

co:2345:respawn:/sbin/getty console DT9600 vt100

[root@diy /root]# grep DT9600 /etc/gettydefs
DT9600# B9600 CS8 CLOCAL # B9600 SANE -ISTRIP CLOCAL #@S login: #DT9600

Jim Trocki <>
Computer System and Network Engineer
Transmeta Corporation
Santa Clara, CA

Comment 1 Cristian Gafton 2000-01-04 22:20:59 UTC
Assigned to dledford

Comment 2 Bill Nottingham 2000-03-04 18:03:59 UTC
*** This bug has been marked as a duplicate of 9948 ***

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