USB and Ethernet periodic failure

[BooX]

Hi

A have a PI running 24/7 on a remote location only with SSH access and a good friend who can unplug and plug the power cable...
From time to time it appears that the Ethernet connection on the Pi dies and maybe also the USB.

A have a big psu connected with more than enough amps and the cpu usage is very low ( around 0.05 ).
The system was running stable for the first 14 days, but after a power outage the errors began to show up.

Since I'm not much a hardware guy I would like to hear in which log to look for some hints on what actually goes down ( if it's the bus, the Ethernet connection or the Pi ) and also what to look for in the log ?

Thank you in advance.

BooX

[jamesh]

I would suspect a power issue. Even with a good supply, if the USB cable itself is rubbish, you can get exactly this (as I did)

To check this, you need to measure the voltage between tp1 and tp2 when the device is under load.

[BooX]

Hi jamesh

Thank you for the reply.

I don't think it's a usb-cable issue since I have been replacing both the psu and the cable when the problems started. I'm actually backpowering the Pi through the USB-ports at the moment... still with the same result.

BooX

[lingon]

Hi
A have a PI running 24/7 on a remote location only with SSH access and a good friend who can unplug and plug the power cable...
From time to time it appears that the Ethernet connection on the Pi dies and maybe also the USB.

Do you have a USB hub connected to the Pi? I have a similar problem and it seems that the USB hub is causing the Ethernet connection and USB connections to crash.

[BooX]

Do you have a USB hub connected to the Pi? I have a similar problem and it seems that the USB hub is causing the Ethernet connection and USB connections to crash.

No USB hub, just a USB male->female cable with power insertion.

BooX

[BooX]

Hi

Just a update.

It's not just the ethernet/usb-bus that dies. I had a cronjob running every five minutes and it also stops, so I assume it's the PI that crashes ?
I just wrote the sd-card with a imagebackup from back when I wasn't having any problems, and will see if this changes anything.

BooX