Upgrading to 26.09 caused the front page of Anki to remain blank. After removal and reinstallation, it appeared, but after a short lag. This lag has disappeared with 29.06.2.
However, when selecting a card from the browse window, the same blank page appears and remains blank for 5 – 10 sec. The card eventually appears.
Trying Vulkan leaves all windows blank. Changing the video driver to Software seems to make all windows visible and drawn faster than the original OpenGL.
It depends on your video driver, but it looks like Vulkan is broken for Linux users recently (26.05+) more often than not. I’ll see if there’s a way we can detect issues and hide the option and fall back to software rendering.