Edit: Bilinear Filtering doesn’t work in conjunction with the GBA Color Shader.
Original Post: When my display driver is set to OpenGL, the Bilinear filtering option does nothing. With Software (Qt) or OpenGL (force version 1.x) selected, Bilinear filtering works as expected.
I was originally going to just leave OpenGL (force version 1.x) selected as a workaround, but shaders are only selectable while the OpenGL display driver is in use.
Running Intel(R) HD Graphics 615. Thanks for reading!