On 24/01/2021 16.06, Yamaban wrote:
On Sun, 24 Jan 2021 15:44, Carlos E. R.
wrote:
...
I'm shooting into the blue here, so please bear with me:
Go ahead :-)
I've seen similar behavior in an environment with an unstable AC-power.
With "unstable" I mean one or more (sine-)periods of serious undervoltage, e.g. for a nomial Voltage of 240Vrms a 2 period long (40ms @50Hz) drop to ca 50Vrms.
Now, a good quality and amply dimensioned PSU just swallows such "brown-outs", but on a lesser quality, or driven at more than 80% nominal load a PSU can cut the "power-good" signal and thus causing a reboot (if configured to boot-on-power-on).
A edison-glow-lamp and flourescent lamp would flicker, some LED lamp might, others might not.
Monitoring such happenings is a pain in the but, and for most of us is would make no sense to invest in such equipment.
A UPS is in most cases cheaper.
Well, that machine is on an UPS. My desktop is on another UPS, and the router (another room) has yet a third UPS :-) What I haven't bothered to do is have some software monitoring the UPS (two of them have the port). I must get to do it. At the moment this happened I was at the kitchen, where I have an LG TV that is very sensitive to power fluctuations (bad design): switch something on or off, and the sound drops to zero for half a second. Something as dramatic as a real power glitch would crash that TV. -- Cheers / Saludos, Carlos E. R. (from 15.2 x86_64 at Telcontar)