Hi Rogério,
Sorry to hear about this issue.
Is there enough info in syslog/journal to tell whether it's a graceful
(software-initiated) shutdown or simply the hardware forcing power off?
I was going to mention the temperature thresholds that were adjusted:
https://anonscm.debian.org/cgit/collab-maint/micro-evtd.git/commit/?id=b6a052b00cf898689dba1dd993037facaa1bf741
but if that were the issue, I would expect it to cause problems when
micro-evtd is not running, as well (since in this case nothing will
trigger the fan to spin up).
1-2 days is a very odd time period for it to survive!
