connection is re-estabilshed immediately. Any ideas? Thanks, Francesco $ sudo upsc atlantis [cut] device.mfr: Atlantis device.model: A03-OP1000 MS02035C device.serial: unknown device.type: ups driver.name: megatec driver.parameter.pollinterval: 2 driver.parameter.port: /dev/ttyS1 driver.version: 2.4.3 driver.version.internal: 1.6 [cut] ups.beeper.status: disabled ups.delay.shutdown: 0 ups.delay.start: 2 ups.load: 0.0 ups.mfr: Atlantis ups.model: A03-OP1000 MS02035C ups.serial: unknown ups.status: OL ups.temperature: 37.1 ups.type: online $ sudo upsdrvctl -u nut -DDDDDDDDD shutdown atlantis Network UPS Tools - UPS driver controller 2.4.3 0.000000 0.000376 Shutdown UPS: atlantis 0.000398 exec: /lib/nut/megatec -a atlantis -k -u nut Network UPS Tools - Megatec protocol driver 1.6 (2.4.3) Initiating UPS shutdown Shutting down UPS. upsd in debug: Aug 15 16:15:07 prezzemolo megatec Communications with UPS lost: No status from UPS. Aug 15 16:15:09 prezzemolo upsd[2231]: mainloop: no data available Aug 15 16:15:09 prezzemolo upsd[2231]: mainloop: polling 2 filedescriptors Aug 15 16:15:09 prezzemolo megatec [2209]: Communications with UPS re-established