could anyone verify if the S3TC DXT5 is working on Linux with Nvidia drivers? The routine I am using works flawlessly on Windows, but on linux the same code works only with DXT1 and DXT3, for DXT5 (BC3) I am getting purely black colors on all color channels with only the alpha channel working as expected.

I am having difficulties finding any piece of software demonstrating the DXT5 functionality on Linux to verify this. I found one set of tutorials where the DXT5 is used but the displayed result is the same as my code, so I am inclined to believe that this is a driver issue. I am on Ubuntu, my GPU is nVidia GeForce 1060 and drivers are v384. I have also tried to swich to Nouveau drivers but I didn't get any video at all, so I had to switch back.

Thank you very much in advance.