[Crash-utility] Why won't crash read 2.6.19.2 live system?

[Marc Milgram]

I am stuck with trying to read access 2.6.19.2 when crash 4.0-3.17
starts.

With debug turned on, I get:

...
WARNING: cannot read linux_banner string
/proc/version:
Linux version 2.6.19.2MM2 (mmilgram at scipo) (gcc version 3.4.5 20051201
(Red Hat 3.4.5-2)) #1 SMP Tue Jan 16 10:58:09 EST 2007
linux_banner:

crash: kern/vmlinux and /dev/mem do not match!

Usage:
  crash [-h [opt]][-v][-s][-i file][-d num] [-S] [mapfile] [namelist]
[dumpfile]

Enter "crash -h" for details.


If I use the same copy of vmlinux and /dev/mem with gdb, I can read
linux_banner:

(gdb) p linux_banner
$5 = "Linux version 2.6.19.2MM2 (mmilgram at scipo) (gcc version 3.4.5
20051201 (Red Hat 3.4.5-2)) #1 SMP Tue Jan 16 10:58:09 EST 2007\n"

I ran crash in gdb and found that read_dev_mem reads 1500 bytes of data
from /dev/mem, but all the bytes are 0.

Am I doing something wrong?

Thanks in advance,
Marc