Some time in late 90s/early 2000s there was a project called KGI (kernel graphics interface) and GGI (general graphics interface) which tried to topple X11's su

Some time in late 90s/early 2000s there was a project called KGI (kernel graphics interface) and GGI (general graphics interface) which tried to topple X11's supremacy too. But they were probably too early in the game and did not have any corporate backing -- and so KGI was denied inclusion in the kernel. But perhaps they paved the way somehow for KMS to be successful.