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Re: Performing installer tests on PowerMac with USB sticks

Hello all,

In response to the booting G4 from USB...

I booted my iBook G4 (A1134 2005 model with 1,42 GHz cpu and 1GB DDR) with the string :

boot usb0/disk@1:2,\\yaboot

Going straight into the second partition on the USB, where all the boot information is stored. Some use the third partition (replace the 2 with a 3 in the command), however; the third partition contains the live boot. You want the second partition to get the command-line environment.

Next I started the install with ‘install32’ and loaded Linux onto my hard disk.

After finishing, I made the yaboot load with flags:

radeon.modeset=0 radeon.agpmode=-1 radeonfb=1024x768-32

Since my iBook G4 has an old Radeon 9600 GPU in it. Hence the flags.

I don’t know how this would translate to loading GRUB and booting Linux on G4’s, but I thought this might be of considerable help.

Kindest regards,

Stephan Hubers

Verstuurd vanaf mijn iPhone

Op 30 apr. 2019 om 18:07 heeft Steve Burkhart <benzguy1197@gmail.com> het volgende geschreven:

This has worked for me on every ibook / powerbook I have tried it on.
First check to see where your usb stick is located. You would do

dev usb0


dev usb1


etc.. until you find the one that has @disk1

this is the one that you want to tell OF to boot from. So, lets say
your usb stick is at usb0. You would do

boot usb0/disk@1:,\\yaboot

On 4/30/19, Karl <mpc7500v2@gmail.com> wrote:
Last Gen of Powerbook G4 12“ doesn’t boot from USB also.

Am 30.04.2019 um 16:08 schrieb John Paul Adrian Glaubitz

On 4/30/19 3:49 PM, aggaz wrote:
I find the documentation from NetBSD be the best companion to exploit
OpenFirmware, in case of problems I suggest to take a look at it [1,2].

[1] https://www.netbsd.org/ports/macppc/faq.html
[2] https://cdn.netbsd.org/pub/NetBSD/NetBSD-8.0/macppc/INSTALL.html

Thanks. That's extensive enough.

P.S: Are ISO images capable to boot with GRUB instead of yaboot already
available for the masses? If so I would like to try to boot one.
No, I haven't created any test images yet. Building a bootable image with
GRUB is quite complicated and I expect the first rounds of the image to
be completely broken, so there wouldn't be much sense to publish


.''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
`-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

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