Re: kernel lockup

On Wed, May 16, 2001 at 11:21:54AM +0200, Benjamin Herrenschmidt wrote:

quoted

bigfoot:~# kbdrate -h
kbdrate: invalid option -- h

thats interesting, kbdrate -h gives a usage message for me.. like it
should.  

quoted

Machine check in kernel mode.
Caused by (from SRR1=c9030): Unknown values in msr

What do I do to debug this?

The machine is totally locked, not even the SysRQ combination does
anything.  (control+command+power still resets though, since it is handled
in hardware on oldworlds.)

Well, I guess that kbdrate is yet another dumb x86'ism that will
directly tap the hardware of a PC's keyboard controller...

according to the man page it trys to be portable:

[...]
       All this is very architecture dependent.  Nowadays kbdrate
       first tries the KDKBDREP and KIOCSRATE ioctls.  (The  for-
       mer  usually  works  on  an  m68k  machine, the latter for
       SPARC.)  When these ioctls fail an ioport interface as  on
       i386 is assumed.

FILES
       /etc/rc.local
       /dev/port

Linux 1.1.19               22 June 1994                         2

that fallback is probably the bugger though.  

Well, I may be wrong, but machine check usually means that you are
trying to access non-existing hardware.

-- 
Ethan Benson
http://www.alaska.net/~erbenson/