Debugging random reboots
- by M132
I'm running Ubuntu 14.04 with 3.16.1 kernel compiled from source, and when I leave my PC running for a long time, it always reboots after about 4-8 days. Nothing is displayed on the screen, everything just freezes for about 3 seconds (and if there was any sound playing, it keeps repeating over and over), and then reboots. This issue also affects kernels compiled by Canonical's build bots.
I already tried to debug it with:
rsyslog
kexec-tools
netconsole kernel module
None of them seem to be working however. Are there any better methods to check, what exactly fails here? If there's an issue with RAM for example, shouldn't kernel report this in dmesg, or cause a kernel panic?