I’m trying to run TigerVNC with hardware acceleration.
For that to work, as I have understood it, the driver requires DRI3, which is not available in your, proprietary, driver, only DRI2 is.
See also: OpenGL isn't accelerated by default with Nvidia drivers · Issue #1773 · TigerVNC/tigervnc · GitHub
Right now, a 14 year old Intel CPU with integrated GPU is able to deliver better performance than an expensive Nvidia GPU, which I find is pretty funny.
Please add DRI3 support.