Re: Multi-seat X crashes

[Erik W. <om...@vc...>]

Helge Hafting wrote:
> This is probably the classic problem where an xserver mistakenly
> thinks it has the "only" vga-compatible card in the box, and
> tries reprogramming video timings using legacy vga hardware
> addresses that might affect the wrong card.
Isn't this what the "VGAAccess" "false" option is for?

> Third workaround: Configure framebuffers in your kernel,
> get a framebuffer for each and every screen.
This is something I tried for a while, but didn't have much luck with.
I'll give it another shot though.  Accelleration isn't a huge deal, and
3D is out with multiple cards anyway, so speed should be acceptible.

What I'd really like to be able to do is get both heads of the
dual-headed cards running separate framebuffers, and get separate X
servers running on those.  That would let me get away with only 3 video
cards for 6 heads, freeing other PCI slots for either other cards, or
smaller motherboards.  Problem is, I couldn't figure out if it is even
possible to have separate /dev/fb devices with the kernel fb driver...
Everything I tried was either 5+ years old and didn't exist anymore, or
didn't work in the slightest otherwise.