Olimex A20 Lime 2 hangs

[PaceyIV]

I've bought an Olimex A20 Lime 2 board a month ago.
I'm using the notable unofficial images by Igor Pečovnik.
The problem is the board hangs, and when it happens I can't access to the debug console do discover anything.
Igor has found the problem on his board, he give me a new uboot and using it, his board doesn't hang anymore. (http://forum.armbian.com/index.php/topic/295-freezing-problem-with-olimex-a20-lime-2/)
My board still to hang.

How can I understand if the problem is my board?
I've connected to the board a battery and a sata hard drive powered by the board. The board is also connected to my router with the lan port, and the board is powered by your official power supply.
I can use the boot partition of your official release and my actually rootfs that it is on my sata hard drive? I know that I have to copy also the firmwares (if any) from your official images to my rootfs.
Is there something else I can do to understand where is the problem?

[Pawel_W]

You need to ensure that the A20 CPU is cooled adequately. Radiator on the CPU is a must.
Also, if the Lime2 is in the enclosure, test it with its lid off.

Besides, I doubt that this tiny power supply is sufficient to power A20 and the hard drive, use the separate power supply for it!

[LubOlimex]

Hey,

Make sure that you also test with the official Debian image. That would clear software-related kind of an issue. The official Debian image may be found here: https://www.olimex.com/wiki/images/3/39/A20-lime2_debian_3.4.90_release_2.torrent

Then test without the SATA disk. This would clear power-related issues.

These tests would probably narrow the list of possible problems.

Best regards,
Lub/OLIMEX

[PaceyIV]

I don't use the enclosure, the board is on an open space. The load is typically very low.
I can power the board and the sata hard disk with only the battery. This means that the is not a power issues or doesn't mean anything?

Now I'm trying the new Igor's debian jessie image. If it fail again I would try the official image.

Thanks for your advice.

[soenke]

You can try to keep an open connection on UART0 to see if some kernel message appears the moment the board hangs up.

[PaceyIV]

The board hangs after a couple of days or ten days.
I can't keep my pc powered all this time!
I've checked the log in /var/logs but I found anything interesting, but I'm not an expert.

[soenke]

Try to simulate some different load scenarios using "stress" (CPU, RAM, I/O, all at once), maybe you can shorten the time to a hangup.
Also try a different SD-Card if you dont use flash. Some SD-Cards have half-broken controllers which can cause this type of random hangups.

Instead of using your PC, you could also use another olinuxino or raspi or a random microcontroller to monitor the UART.

[PaceyIV]

I don't have another board.
My rootfs is on sata hard drive. The sdcard is used only during the boot to load the kernel.