Installing or running SAMSON on Ubuntu 17.04 and later versions

DmitriyMarin

If you experience some problems installing or running SAMSON on Ubuntu 17.04 or later with Nvidia GPU, it might be due to problems between Nvidia driver and GNOME Display Manager (gdm3). This might be caused by Wayland. You may try to use the Xorg display server instead of Wayland. For that, at the login console choose Xorg server instead of Wayland, or uncomment the line #WaylandEnable=false in the file /etc/gdm3/custom.conf.

Before installing Nvidia driver, check which Nvidia driver version is compatible with your GPU. To check which GPU you have, run this command:

lspci | grep VGA

To install Nvidia driver, run the following command with the version that supports your GPU:

sudo apt-get install nvidia-xxx

If you still experience some problems with Nvidia drivers and GNOME Display Manager with Xorg server, you may try to switch to LightDM display manager (Canonical's solution for a display manager). To switch to lightdm, run the following command:

sudo dpkg-reconfigure lightdm

or if it was not previously installed run:

sudo apt-get install lightdm

and choose lightdm.

To check which display manager is currently being used, run this command:

cat /etc/X11/default-display-manager

If you cannot install or run SAMSON because there is no libOpenGL or libGLX, check if they present in the system by running the following commands:

sudo updatedb
locate libOpenGL.so
locate libGLX.so

If a driver you installed does not provide libOpenGL, you may try to install libopengl0 (a vendor-neutral dispatch layer):

sudo apt-get install libopengl0

If you have no libGLX installed, you may create a symbolic link to libGL provided by Nvidia driver (not by mesa):

locate libGL.so
sudo ln -s /usr/lib/nvidia-xxx/libGL.so /usr/lib/x86_64-linux-gnu/libGLX.so.0

Subhajig

Hi,
I'm trying to install SAMSON on UBUNTU.After giving command "../SAMSON-Setup.run" i'm getting the following error
./InstallSAMSON: error while loading shared libraries: libOpenGL.so.0: cannot open shared object file: No such file or directory
restoring context.
Please advise how to avoid this error.

Thank in advance.

DmitriyMarin

Hi @Subhajig ,
What Ubuntu version do you have?
Do you have an Nvidia GPU? You can check it with the following command in the terminal:

lspci | grep VGA

Subhajig

Thanks for quick reply,
My UBUNTU version is 16.04.4 LTS.
After giving "1spci | grep VGA" i'm getting following
"00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06)"
Thanks in advance.

DmitriyMarin

It seems that your system does not have a dedicated GPU. You should be able to run SAMSON with Intel (with built-in graphics), but you may lack some SAMSON features, which relies on GPU.

Could you, please, check the result of the following command in your terminal:

glxinfo | grep OpenGL

If you see "The program 'glxinfo' is currently not installed", you will need to install the mesa:

sudo apt-get install build-essential mesa-utils libgl1-mesa-dev

After the installation, try the glxinfo | grep OpenGL command again in the terminal.

Subhajig

Hi,
Sorry for delay.After installing mesa also I'm getting same error.Please give some suggestions to avoid this issues.
Thank in advance
Subhajit

DmitriyMarin

Please, post the output of the following command:

glxinfo | grep OpenGL

Subhajig

I'm getting following
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Haswell Desktop
OpenGL core profile version string: 3.3 (Core Profile) Mesa 17.2.8
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.0 Mesa 17.2.8
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.0 Mesa 17.2.8
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00
OpenGL ES profile extensions:

DmitriyMarin

Could you please run the following command in the terminal and post it here:

locate libOpenGL.so

If you see in the result, for example, /usr/lib/x86_64-linux-gnu/libOpenGL.so but no libOpenGL.so.0, you will need to create a symlink.

Subhajig

Hi,
Thank you for your reply.Could you please tell me how will I create a symlink.

DmitriyMarin

Does the command locate libOpenGL.so show you libOpenGL.so or not?
The symlink can be created in the terminal as follows:

ln -s target linkname

Subhajig

After giving command 'locate libOpenGL.so' i'm not getting any output.

DmitriyMarin

@Subhajig

Could you, please, double-check whether libgl1-mesa-dev is installed:

sudo apt-get install build-essential mesa-utils libgl1-mesa-dev

Please, check the troubleshooting section of the SAMSON Installation guide.
You can do a symlink to the libQt5OpenGL.so shipped together with SAMSON:

ln -s $HOME/NANO-D/SAMSON/0.7.0/Binaries/SAMSONQtLibs/libQt5OpenGL.so $HOME/NANO-D/SAMSON/0.7.0/Binaries/SAMSONQtLibs/libOpenGL.so.0

or you can install compiz and create symlink to its OpenGL:

sudo apt-get install compiz-dev
sudo ln -s /usr/lib/x86_64-linux-gnu/compiz/libopengl.so $HOME/NANO-D/SAMSON/0.7.0/Binaries/SAMSONQtLibs/libOpenGL.so.0

Subhajig

Hi
Thank you for your help.It worked fine.But Now I have another problem.In SAMSON installer tab I 'm not able to write samson key after giving my email address,
So installation is not being started.

Subhajig

Installation is done.