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Message #76787
[Bug 1359980] Missing required logs.
This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:
apport-collect 1359980
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1359980
Title:
[Hyper-V] Unable to perform a full kernel crash on Ubuntu 14.10
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
System details:
Linux ubuntu 3.16.0-9-generic #14-Ubuntu SMP Fri Aug 15 15:03:57 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Ubuntu Server 14.10 Daily build from 19th Aug (first build picked up for testing)
We have followed the steps at
https://wiki.ubuntu.com/Kernel/CrashdumpRecipe to configure kdump on a
Generation 1 VM.
kdump is loaded and when we trigger the crash, a kernel panic is
displayed.
Issues:
1. The vmcore/crash file is not generated under /var/crash as configured in the kdump config.
2. The VM will hang and not reboot. Default action to take in case of a failure is to reboot - again as set in kdump config.
Repro rate: 100%
VM settings: tests ran with 1 CPU core or 4 cores.
Negociated VMBus is 3.0, which has been integrated since 14.04 so this should work as no other patches are needed. (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1317697)
I'm also attaching the serial console output of both cases - single
core and SMP.
root@ubuntu:~# kdump-config load
efi memory descriptor version 0 is not supported!
* loaded kdump kernel
root@ubuntu:~# cat /sys/kernel/kexec_crash_loaded
1
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References