Forgive me if this is more of an install/FAQ type question than a porting
  question, but having scoured the net all day I have not found an answer.

  Sun 4/260 with CGTwo and BWTwo (and a TAAC), NetBSD 1.1 binaries (two
  disks, one SunOS, one now NetBSD), when I boot b sd(0,0,0)netbsd -s, the
  following error appears:

  zs0a: console i/o
  bw0 at obio0 addr fd000000: bwtwo, 1600 x 1280
  ie0 at obio0 addr f6000000 pri 6 address 08:00:20:06:12:12, type onboard
  el0 at mainbus0
  es0 at mainbus0
  cgtwo0 at vmes0 addr ff400000 vec 0xa8: cgtwo, 1152 x 900
  panic: multiple /dev/fb declarers

  The only workaround I have found is to pull the cgtwo out of the machine.
  I can't pull the bwtwo out because it has the serial ports, ethernet, and
  keyboard attachment.  Am I missing something? (Hopefully a switch on the
  bwtwo to disable it?) If I can get -current compiled, I plan to config
  out the bw0 driver; failing that, I will try to find and comment out the
  driver code itself (at least that part which declares it as a /dev/fb).
  Any suggestions?

  I will summarize and post.  Thanks,

  Chris Austin-Lane
  cal@nas.edu