AC68 Rebooted Itself - Nothing in SysLog?

[Dezzo]

My normally stable AC68U running 380.64_2 rebooted itself today for no apparent reason.
Loads were light at the time and temps are OK.

I checked the System Log and the last entry was from about 2 weeks ago!
Under Administration-System "Default message log level = Notice" and "Log messages more urgent than = Debug" which are the default settings as I've never changed them.

What would I need to change those settings to in order to receive very helpful info in the log, such as why a seemingly random reboot occurred?

Is there some combo of those two settings that will give me important log details without flooding the log with useless notices? Kind of surprised there was no info at all 2 weeks prior to and including the reboot!

 

[mstombs]

I am not a big fan of regular writes to jffs, but the code nows reads OK, should only copy on a timer (1 minute IIRC), and only if new entries in the log, see

https://github.com/RMerl/asuswrt-merlin/blob/master/release/src/router/rc/watchdog.c#L2480

And what if the problem is being unable to write to jffs?

Some messages held on ram disk will always be lost due to this jffs protection, it is better to use the remote syslog facility to send out messages as they are generated - I have an old nslu2 still running as a log server on my lan for this.