Running a Linux Build on a Remote X Server

[blitzen]

I’m testing the Linux build of our Unity 5.5.1 application on a remote 14.04.3 LTS X client over a LAN, running Xming on the local Windows 10 workstation and forwarding the X connection from the Ubuntu 14.04.3 server through Putty/SSH.

The application is relatively resource-unintensive; displaying videos on a flat mesh of a few dozen polygons at most, and works on the physical machine with a monitor.

While other X apps such as xclock and gedit come through the tunnel fine, running the Unity3D app segmentation faults:

myuser@myuser-DS81D:~$ ./app/MyApp-Linux.x86_64
Set current directory to /home/myuser
Found path: /home/myuser/app/MyApp-Linux.x86_64
Mono path[0] = ‘/home/myuser/app/MyApp-Linux_Data/Managed’
Mono path[1] = ‘/home/myuser/app/MyApp-Linux_Data/Mono’
Mono config path = ‘/home/myuser/app/MyApp-Linux_Data/Mono/etc’
displaymanager : trying .X11-unix
client :0 has 1 screens
displaymanager screen (0): 1024 x 768
Using libudev for joystick management

Importing game controller configs
Aborted

This shows up in Player.log:

Stacktrace:

Native stacktrace:

/home/myuser/app/MyApp-Linux_Data/Mono/x86_64/libmono.so(+0x91a46) [0x7feb68cb7a46]
/home/myuser/app/MyApp-Linux_Data/Mono/x86_64/libmono.so(+0x348e4) [0x7feb68c5a8e4]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x10340) [0x7feb6e6ff340]
./app/MyApp-Linux.x86_64() [0xf3065f]
./app/MyApp-Linux.x86_64() [0xf27e94]
./app/MyApp-Linux.x86_64() [0xf2956b]
./app/MyApp-Linux.x86_64() [0x465f7e]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7feb6cf48ec5]
./app/MyApp-Linux.x86_64() [0x46f7a5]

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: Operation not permitted.
No threads.

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

$DISPLAY is localhost:10.0. Relevant lines from /etc/ssh/sshd_config:

X11Forwarding yes
X11DisplayOffset 10

Is it a bug in Unity 5.5’s Linux build, or is there something else that would prevent it from running through a remote X display?

[knobby67]

Hi you might try the Linux forum in experimental builds section.