Apr 17, 2019, 9:55 AM

Does the following command in the terminal:

MESA_GL_VERSION_OVERRIDE=4.5 glxinfo | grep OpenGL

among other output show you (for your version of Mesa):

OpenGL version string: 4.5 Mesa 18.2.8

Basically, it should specify the version of OpenGL provided by Mesa.

In the SAMSON-Core.sh script you can try modifying it as follow (see the line with ./SAMSON-Core):

...
export LD_LIBRARY_PATH=$script_dir:.:./SAMSONQtLibs:$LD_LIBRARY_PATH

#ldd SAMSON-Core	#uncomment to have more information if SAMSON crashes
#echo $LD_LIBRARY_PATH	#uncomment to have more information if SAMSON crashes
MESA_GL_VERSION_OVERRIDE=4.5 ./SAMSON-Core --logconsole			#available flags --disablenetwork /--import /--logconsole /--logfile "file" /--logdefaultfile

export LD_LIBRARY_PATH=$SAVED_LD_LIBRARY_PATH
export LC_ALL=$SAVED_LC_ALL
echo "restoring context"

You can try modifying the OpenGL version to 3.2, 4.2, 4.5. Does it launch SAMSON and do you still have the same problem?