Bug Unity 5.6.0b6 crushes after several minutes.

Ubuntu 16.04.
Unity interface disappears after I keep it open for several minutes.
When trying to open project again it tells that another instance of Unity using this project.
But it seems that all Unity process are dead.

 

The bug reporter doesn't appear?
Can you post your editor log? (~/.config/unity3d/Editor.log)

 

mono profile = '/home/u001/unity-editor-5.6.0xb6Linux/Editor/Data/Mono/lib/mono/2.0'
Initialize mono
Mono path[0] = '/home/u001/unity-editor-5.6.0xb6Linux/Editor/Data/Managed'
Mono path[1] = '/home/u001/unity-editor-5.6.0xb6Linux/Editor/Data/Mono/lib/mono/2.0'
Mono path[2] = '/home/u001/unity-editor-5.6.0xb6Linux/Editor/Data/UnityScript'
Mono path[3] = '/home/u001/unity-editor-5.6.0xb6Linux/Editor/Data/Mono/lib/mono/2.0'
Mono config path = '/home/u001/unity-editor-5.6.0xb6Linux/Editor/Data/Mono/etc'
Using monoOptions --debugger-agent=transport=dt_socket,embedding=1,defer=y,address=0.0.0.0:56947
Desktop is 1366 x 768 @ 60 Hz

LICENSE SYSTEM [201729 17:50:26] No start/stop license dates set

LICENSE SYSTEM [201729 17:50:26] Next license update check is after 2017-02-05T12:53:19


COMMAND LINE ARGUMENTS:
/home/u001/unity-editor-5.6.0xb6Linux/Editor/Unity
[0209/175026:ERROR:browser_main_loop.cc(161)] Running without the SUID sandbox! See https://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment for more information on developing with the sandbox on.
ATTENTION: default value of option force_s3tc_enable overridden by environment.
[0209/175027:ERROR:renderer_main.cc(227)] Running without renderer sandbox
[0209/175027:ERROR:gpu_process_transport_factory.cc(402)] Failed to establish GPU channel.

 

I've had the same issue with Unity not letting me reopen a project after a crash. What fixed it for me was deleting the UnityLockFile in the /Temp directory.

Not sure what is causing Unity to crash after a few minutes though. I'll be testing the newest build on Ubuntu 16.10 later.