Linux build crashes on startup if not dev build

Hi

I recently changed my unity version from 5.3.5 to 5.5.0, and I did try to build for windows, osx, and linux, and all was fine. Then I built proper versions (not development builds) of everything today, and now the linux version crashes on startup. If I build the project as a development build, everything works fine.

My linux test machine runs on Ubuntu 14.10, 64 bit.
The openGL version on it is 3.3

This is what I assume is the relevant output from the log:

Debug info from gdb:

Could not attach to process. If your uid matches the uid of the target
process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try
again as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf
ptrace: Operationen inte tillåten.
No threads.

=================================================================
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================


Anyone have an idea on how to solve this? (I'm not used to linux, so do tell if you need some other debug info.)

 

Also, I can't choose graphics api for linux in my player settings - I just get the option for windows and osx. Do I have to do something to enable it? (I've read other threads where changing the openGL version have solved similar crashes.)

I have also tried to use -force-opengl as a launch option, which didn't change anything.

 

For Linux, the only graphics api in Unity 5.5 is OpenGL Core.
Are you sure your test machine supports OpenGL core profile 3.2 or higher?

 

Yup, I'm sure. I checked through the terminal and through steams interface and got the same answer: OpenGL 3.3.0
And it runs 5.5 development builds without a problem.

 

It doesn't crash with an empty scene though, so I'll dig in what type of asset that cause this.