Bug 14576

>>Number:         14576
>>Category:       i386
>>Synopsis:       Ctrl+Alt+Space causes kernel panic
>>Confidential:   no
>>Severity:       critical
[...]
>>Originator:     Patrick Julien
>>Release:        3.3-RELEASE
>>Organization:
>Fac simile E-commerce
>>Environment:
>FreeBSD damien.fac-simile.com 3.3-RELEASE FreeBSD 3.3-RELEASE #0: 
>Thu Sep 16 23:40:35 GMT 1999     
>jkh@highwing.cdrom.com:/usr/src/sys/compile/GENERIC  i386 
>>Description:
>Pressing Ctrl+Alt+Space, outside of X, produces
>
>Fatal trap 9 : general protection fault while in kernel mode
>
>instruction pointer = 0x8:0xc02485ed
>stack pointer = 0x10:0xc02eb28c
>frame pointer = 0x10:0xc02eb2c4
>code segment = base rx0, limit 0xfffff, type 0x1b,
>		= DPL 0, pres 1, def32 1, gran 1
>precessor eflags = interrupt enabled, resume, iopl=0
>current process = idle
>interrupt mask = net tty
>trap number = 9
>
>panic : general protection fault

This was fixed in both -CURRENT and -STABLE just after 3.3 was
released.  *sigh*

Please apply the attached patch to /sys/i386/apm/apm.c and rebuild the
kernel, then all should be fine.

If you don't like to rebuild the kernel, you can edit your keymap file
so that it won't cause panic.  You must be loading your keymap from
/usr/share/syscons/keymap.  Find your keymap and locate the following
line.

  057   ' '    ' '    nul    ' '    ' '    ' '    susp   ' '     O
                                                  ~~~~
And change it to

  057   ' '    ' '    nul    ' '    ' '    ' '    '  '   ' '     O
                                                  ~~~~ (a quoted space)
You must change the next line too.

  104   slock  saver  slock  saver  susp   nop    susp   nop     O
                                    ~~~~          ~~~~
Change this to

  104   slock  saver  slock  saver  nop    nop    nop    nop     O


Kazu

Index: apm.c
===================================================================
RCS file: /src/CVS/src/sys/i386/apm/apm.c,v
retrieving revision 1.77.2.8
retrieving revision 1.77.2.9
diff -u -r1.77.2.8 -r1.77.2.9
--- apm.c	1999/09/12 01:06:28	1.77.2.8
+++ apm.c	1999/09/20 15:34:29	1.77.2.9
@@ -621,6 +621,9 @@
 apm_suspend(int state)
 {
 	struct apm_softc *sc = &apm_softc;
+
+	if (!sc->initialized)
+		return;
 
 	switch (state) {
 	case PMST_SUSPEND:

Comment 2 yokota 1999-11-08 09:33:19 UTC

State Changed
From-To: open->closed

The bug has been fixed in both -CURRENT and -STABLE.