Ubuntu
linux-lts-raring package

  1. Bug #1256811
  2. Comment #2

Comment 2 for bug 1256811

Revision history for this message
Georg Altmann (george-george-net) wrote : Re: linux kernel panic on bluetooth DUN disconnect

Struggling to get a kernel crash dump as described here:
https://help.ubuntu.com/12.04/serverguide/kernel-crash-dump.html

Configuration done as described, but
echo c > /proc/sysrq-trigger
only causes a crash without any dump being captured: system hangs with blinking capslock.

% dmesg |grep crash
[ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.8.0-32-generic root=/dev/mapper/ubuntu-root ro crashkernel=384M-2G:64M,2G-:128M
[ 0.000000] Reserving 128MB of memory at 720MB for crashkernel (System RAM: 3989MB)
[ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-3.8.0-32-generic root=/dev/mapper/ubuntu-root ro crashkernel=384M-2G:64M,2G-:128M

I did '/etc/init.d/kdump start' and sysrq is working as expected. /var/crash is empty. Any Hints?