I've been having some trouble optimizing boinc on my computer.
After much digging I've discovered that the GUI on Ubuntu Linux causes (or at least is correlated with) the corruption of work units.

Here's a link to the threat over at Einstein where we figured this out: https://einsteinathome.org/content/help-configuring-multi-core-multi-gpu#comment-158059

Machine:
Intel CPU with 4 cores
Nvidia GPX 690 (which is two GPX 680's on one card) with 2 GPUs.

Windows 7: with an appropriately configured app_config.xml 4 GPU work units will crunch along, using one of each of the CPUs to support each GPU work unit.
This is possible because the card has 4GB of ram which is adequate to support 2 work units per GPU.

Ubuntu Linux 17.04: With the same app_config.xml, work units are corrupted within 10-15 seconds so lots of work units are churned through and more are downloaded. Quite a mess.

However, if I drop the GUI "sudo systemctl stop lightdm", 4 GPU work units will function just fine without error.

This looks like a bug to me, but it's not clear if this is a Boinc bug or an Einstein bug.
My guess is it's boinc.

Thoughts?

Thanks in advance.