On Thu, Jul 11, 2002, Lubomir Sedlacik wrote:
> since cgsix framebuffers can be configured only in OBP, i searched the
> web for hints how to set resolution on secondary framebuffer and found
> something in well known Framebuffer FAQ:.  the example looks this way:

> any hints how to set nvramrc properly to achieve $SUBJ are appreciated.

I thought I'd have a play with this [#], so I put a second framebuffer
in a Sparc 5 clone (Cycle 5 IP).  Both framebuffers default to 1152x900,
so I tried to set the second to 1024x768.  After about an hour, I came up
with (from the PROM prompt) :

  nvedit
  probe-all
  " /iommu/sbus/cgsix@1" select-dev
  r1024x768x60
  " /iommu/sbus/cgsix@1" " set-resolution" execute-device-method
  end-device
  install-console
  banner
  ^C
  nvstore
  setenv use-nvramrc? true
  reset

On boot, it now shows :

  cgsix0 at sbus0 slot 0 offset 0x0 level 9: SUNW, 501-2325, 1152x900, rev 11 (console)
  cgsix0: attached to /dev/fb
  cgsix1 at sbus0 slot 1 offset 0x0 level 9: SUNW, 501-2325, 1024x768, rev 11
  
While trying to get this working, I noticed :

  you can type the commands at the PROM prompt to test them out

  the nvrun command didn't appear to do anything, so you have to reset to
  test any changes

  the value of "fcode-debug?" doesn't affect running the contents of nvramrc

  if you've made an error, you'll see the command with the error followed by
   a '?' when you reset.

  the double-quotes and the spaces before the device names and commands are
  important.

  when it's working, you'll know, as the reset will take longer (well, it
  does on this machine, as there is a pause of a few seconds when setting a
  resolution).

Explanation of nvramrc commands above :

  probe-all
    Probe all the devices, in order that you can select the framebuffer on
    the next line ("probe-sbus" would probably suffice for this).

  " /iommu/sbus/cgsix@1" select-dev
    Select the relevant framebuffer device in the device tree.  You must
    be at a framebuffer node in order to run the command on the next line

  r1024x768x60
    Select a resolution

  " /iommu/sbus/cgsix@1" " set-resolution" execute-device-method
    Call the set-resolution method for this (framebuffer) device

  end-device
    Finished with device nodes

  install-console
    Setup the console

  banner
    Display the banner

Quick summary of nvedit commands :

  ^A	move to beginning of line
  ^B	move back one character
  ^C	finish editing
  ^E	move to end of line
  ^F	move forward one character
  ^H	delete previous character
  ^J	insert new blank line after cursor position and move to new line
  ^K	delete to end of line (at end of line, joins current and next lines)
  ^L	display all lines
  ^M	as ^J above
  ^N	move to next line
  ^O	insert new blank line after cursor position and stay on current line
  ^P	move to previous line
  Backspace	as ^H above
  Delete	as ^H above
  Return	as ^M above
  
J

[#] because at some point I want to run with both cgfourteen @ 1280x1024 and
cgsix @ 1280x1024 on my 20.

-- 
                    My other computer also runs NetBSD
                          http://www.netbsd.org/