This means that OpenGL is not good enough. GLSL 1.5 is only supported from OpenGL 3.2 on.
I have a NVIDIA T1200 with Ubuntu 22 and my version is:
OpenGL version string: 4.6 (Compatibility Profile) Mesa 23.0.4-0ubuntu1~22.04.1
I do not fully understand the Mesa/OpenGL versions. But I read that NVIDIA basically replaces Mesa with their own implementation, so maybe your NVIDIA driver needs a refresh. OpenGL 3.1 dates back to 2009, so I'd expect that there should be a later version now.
The 2.5d view should not depend on lot on the OpenGL version, so you could try 1.4 version by replacing the version code in the shader codes. But I don't want to dive into that issue, I have other plans for my spare time.
I never had issues with Intel Graphics, NVIDIA is new to me too and I regret having bought hardware with them inside already. I have a lot of other trouble with their drivers.
Comments
Hi @Matthias
Thank you for your reply. Here's the output of
glxinfo | grep "OpenGL version":OpenGL version string: 3.1 Mesa 21.2.6os-release info:
NAME="Ubuntu"
VERSION="20.04.6 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.6 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal
This means that OpenGL is not good enough. GLSL 1.5 is only supported from OpenGL 3.2 on.
I have a NVIDIA T1200 with Ubuntu 22 and my version is:
I do not fully understand the Mesa/OpenGL versions. But I read that NVIDIA basically replaces Mesa with their own implementation, so maybe your NVIDIA driver needs a refresh. OpenGL 3.1 dates back to 2009, so I'd expect that there should be a later version now.
The 2.5d view should not depend on lot on the OpenGL version, so you could try 1.4 version by replacing the version code in the shader codes. But I don't want to dive into that issue, I have other plans for my spare time.
I never had issues with Intel Graphics, NVIDIA is new to me too and I regret having bought hardware with them inside already. I have a lot of other trouble with their drivers.
Matthias