Sporadic Arduino connection issues with Linux client

Submitted by caseyboardman on #1

Hi-

We are connecting an Arduino Uno from a Linux server to a Linux console client (on a VM), and it works fine most of the time. However, sometimes a sketch fails to upload, and we have to reconnect the device. I am not seeing anything suspicious in the logs on either end. Additionally, I can't recreate on demand - it just happens, but it's happening often enough to be something I need to deal with. As an added twist, it seems to be working fine consistently on Windows (also a VM).

Is there a way to crank up the logging on the client and/or the server to a debug or trace level to get as much info as possible? I'm not sure if it's the server, the client, the VM, the network, the Arduino software, or the alignment of the planets. We're trying to rule things out, so any additional info would be helpful.

Thanks!

Submitted by Michael on Fri, 2017/07/28 - 07:46

#2

At the client, can you post the output of command

uname -a

Submitted by caseyboardman on Fri, 2017/07/28 - 22:04

#3

Sure.

Linux bat961081glnxa64 4.4.0-0.bpo.tmw1-amd64 #1 SMP Debian 4.4.16-1~bpo8+1.tmw1 (2016-07-29) x86_64 GNU/Linux

Submitted by Michael on Sat, 2017/07/29 - 10:15

#4

Can you try a later kernel if possible, e.g 4.9 or 4.12

Submitted by caseyboardman on Tue, 2017/08/22 - 03:39

#5

We ended up blaming this on our server, which had a 4.0.x kernel. One of our admins recognized that as having been problematic in the past, so we moved to an older kernel that was supported internally, and it solved our issue. We think that did it, or it was hardware related on that server.

In any case, we're in business. Thanks!