Ubuntu - why would /var/log/dmesg stop updating after boot? does not show panic/cpu_hung errors which the console shows

Posted by Tom G on Server Fault See other posts from Server Fault or by Tom G
Published on 2012-07-06T00:17:17Z Indexed on 2012/07/06 3:17 UTC
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ubuntu

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So I have an Ubuntu 10.04 install VM on a host. Latest 2.6.38-15-server kernel . /var/log/dmesg displays only the bootup but will stop recording after that. It will not show the trace/cpu_hung errors I am trying to troubleshoot. /var/log/dmesg.0 , dmesg.1 nothing - I did a string search for the text that displays on the console during the crash and NOTHING gets logged anywhere in /var/log/* .

I have to call into the provider and ask them to take a screenshot of the console since nothing shows in dmesg.

Why would /var/log/dmesg not record kernel panics, or such?

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