m3mirror on old *books and recent kernels

[Wojciech Owczarek <owczi@owczi.net>]

Hi,

I'm looking for help on how to enable the external vga mirror output on
on my powerbook pismo with m3mirror. To have it working with kernel up
to 2.6.14 I had to do an ugly hack in prom_init.c. After I switched to
2.6.18 and later on to 2.6.20, I could no longer find the place to do
the hack, and all I have on the external VGA output is some magic
OpenFirmware diagnostic message. I believe what I'm looking for is
somewhere in
prom_check_displays();
in the older kernels I had to make Linux loop over exactly two
screens rather than letting it detect them, but now when this behaviour
has changed, I have no idea what to do with it since I'm no kernel
programmer. I have my handy 2.6.14 always ready to boot, but still I
need a newer kernel.

Any suggestions are welcome :)

thanks,

owczi

-- 
   [x]--Wojciech---owczi---Owczarek--WO111-RIPE--[_][+]
    |--------- mailto: owczi|at|owczi|dot|net -------|
    +-------------------- gg: #4245064 --------------+