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Does the kernel, framebuffer, or a framebuffer driver (uvesafb) have an option to specify the video-card output to use?

The kernel only outputs to one monitor:

  • Kernel message buffer (before and after framebuffer initialization)
  • Framebuffer (if specified in kernel command-line)
  • Virtual console (tty's etc)

Note: I have no issues with X-windows configuration (only the console)

Kernel options (with fb):
kernel /stable root=/dev/sda3 video=uvesafb:mtrr:3,ywrap,1920x1200-32@60

Kernel options (no-fb):
kernel /stable root=/dev/sda3

System Information:

  • Gentoo Linux (x86_64)
  • Kernel: linux-3.3.8-gentoo
  • Video Card: NVIDIA GeForce GTX 560 (2x DVI outputs)
  • Driver: NVIDIA Driver Version 302.17
1

I swapped the cables to the video card... simple ... brilliant!

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