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Bug#382129: Beta3 won't boot on OldWorld PowerPC Mac



On Fri, Aug 18, 2006 at 11:44:23AM -0400, Rick Thomas wrote:
> Perhaps the Debian PTBs should simply admit that PowerPC OldWorld  
> Macintosh is an unsupported sub-arch for Debian etch?   /-8

What is PTBs? :)

Well, aside the issue of booting, the kernel runs just
fine and so does the user space... As you can look at
<http://www.us.debian.org/devel/debian-installer/errata>, I think
it is partially admitted in "Oldworld powerpc boot floppies will not
work as miboot is not included".

> One thing I've discovered:  The miboot floppy at http:// 
> people.debian.org/~wouter/d-i/powerpc-miboot/daily/powerpc/floppy/  
> contain the "2.6.16-2-powerpc-miboot (Debian 2.6.16-7)" kernel, which  
> is the same base version (different config, presumably) as the kernel  
> on the beta3 CDs.  And that kernel (the one on the miboot floppy)  
> boots just fine(*) on my beige G3.  So the problem seems to be a  
> configuration issue, not anything fundamental.

I am glad to read it is nothing fundamental like the structure of
the kernel and I see Wouter has played a bit with it. :)

Indeed, I also experienced the same symptoms you describe when the
kernel is too large. It will be fixed when miBoot will be rebuildable
with the GNU toolchain.

> (*) Well... almost "just fine".  There is a small problem with the  
> video parameters -- some columns of the text on the screen seem to  
> flicker.  If I could figure out how to modify the kernel command line  
> arguments (specifically the video options) on the floppy, I might be  
> able to fix that.  Interestingly, "works just fine" only applies to  
> the "boot" floppy.  The "ofonlyboot" floppy does not work -- it gets  
> the same symptoms as I described in Bug#369760, and as someone else  
> has described in Bug#380187.

It is also scheduled to add the possiblity of adding kernel arguments
and even selecting different kernels, but in the mean time, you can do
that inside the kernel configuration, as there is an option for that.

> Currently, miboot (leaving aside issues of "freeness") only works for  
> floppies?  Do you think there is any chance of it's working for  
> booting off of CDs or hard-disks, once we can fiddle with the source  
> code?

It works for hard disks too, but as I explain in my other post some
hours ago, it is a painful process to setup. It does not work on CD,
because there is no low-level MacOSROM calls for that in the code.
However, that could also be added by using EMILE macoslib which is
what we intend to do, but the CD part will only be available when
Laurent will have done what he says at <http://emile.sourceforge.net/>
under Latest News/Next step.

Cheers,
-- 
 .''`.   Aurélien GÉRÔME
: :'  :
`. `'`   Free Software Developer
  `-     Unix Sys & Net Admin

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