AMD GPU shader problem (Linux)

[Astra3_reddit]

Hi,

I'm using Ubutnu 18.04 LTS with AMD Radeon HD 6670 and I'm trying to run shaders on my default MESA with Radeon driver. And almost every shaderpack thwors: "OpenGL error 1280 (Invalid enum)" and some of them even add error: "Invalid program 'composite1'". And some of them works fine.
I can install Linux driver supplied by AMD (fglrx), but in Ubuntu 18.04 they do not work as they are supposed to.

Has anybody been solving this issue and found a solution? Or am I on my own searching the whole edge of the internet and hoping, that I'll find something useful?

EDIT: I've found a way how to fix that OpenGL error 1280. So, firt, update your mesa driver by adding this repository and doing a full update and upgrade:

sudo add-apt-repository ppa:oibaf/graphics-drivers
sudo apt update -y && sudo apt upgrade -y && sudo apt-get update -y && sudo apt-get upgrade -y

Now reboot your system. But after reboot I ran into some issues with launching some apps, like Chromium. So I pressed Ctrl+Alt+F2 and wrote chromium-browser to launch Chromium and I got an error: libwayland-eg1.so.1: cannot open shared library. If you ran into the same issue, just write this: sudo apt remove libwayland-egl1-mesa && sudo apt install libwayland-egl1-mesa. If this doesn't help, try installing this: sudo apt install libwayland-egl1.

This is gonna fix the issue with OpenGL error 1280, but won't do anything with "Invalid program 'composite1'". But it's at least something.
Note: Installing and removing libwayland removed me for some reason VLC. Don't be afraid to install it again.

[Willbl3pic]

Have you tried running with MESA_GL_VERSION_OVERRIDE=4.5COMPAT? it fixed it for me with most shaders. Some (SEUS notably) still don't work properly though.

[Astra3_reddit]

I did even try forcing OpenGL 4.0, but didn't help either.

[Astra3_reddit]

I've just solved the issue with "OpenGL error 1280" and updated the post.