Cannot get kernel crash dump saved and reboot

Asked Mar 27 '18 at 06:03

Active Mar 27 '18 at 06:03

Viewed 854 times

I need to get a crash dump of my linux kernel.

I am going to describe the scenario:

Hardware: Notebook Dell E5450.
Linux Distribution: Linux Mint 18.3 (Ubuntu 16.04).
SysRq: enabled by /etc/sysctl.d/10-magic-sysrq.conf.
Installed packages: linux-crashdump.
Grub2: added "crashkernel=384M-2G:64M,2G-:128M"
Kdump check: "kdump-config show" reports a working configuration.
File system: folder "/var/crash" exists.

When I press "Alt+PrnScr+C" the system freezes without reboot and does not save any dump into /var/crash. Same thing sending "echo c | sudo tee /proc/sysrq-trigger".

How could I fix this situation?

Thank you so much!

asked Mar 27 '18 at 06:03

Antonio Petricca

1

https://serverfault.com/questions/602486/why-is-linux-kdump-not-writing-to-var-crash Does this help? – sneep Mar 27 '18 at 06:14
Unfortunately not, but I configured NETCONSOLE to see what happened to my system. Thank you anyway! – Antonio Petricca Mar 29 '18 at 09:25

Cannot get kernel crash dump saved and reboot

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