Trilium only shows a blank window

Trilium uses Electron which is based on Chromium (the open-source alternative to Google Chrome); in order to improve performance it makes use of GPU acceleration. In some cases, a GPU incompatibility (especially on older models of integrated graphics) can cause nothing to render at all, resulting in a blank window. 

To bypass this, try running Trilium with the following command line argument:

trilium --disable-gpu

If that doesn't work, try the following commands as well:

• trilium --disable-gpu-compositing
• ELECTRON_OZONE_PLATFORM_HINT=x11 trilium (this one forces the rendering to X11 on Wayland)

If Trilium renders fine after this, Trilium offers a built-in option to disable GPU acceleration: go to Options → Appearance, look for the Performance section and then uncheck Hardware acceleration (GPU).