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5.1. Booting the Installer on PowerPC

5.1.1. Booting from a CD-ROM

The easiest route for most people will be to use an Ubuntu CD. If you have a CD, and if your machine supports booting directly off the CD, great! Simply insert your CD, reboot, and proceed to the next chapter.

Note that certain CD drives may require special drivers, and thus be inaccessible in the early installation stages. If it turns out the standard way of booting off a CD doesn't work for your hardware, revisit this chapter and read about alternate kernels and installation methods which may work for you.

If you have problems booting, see Section 5.3, “Troubleshooting the Install Process”.

Currently, the only PowerPC subarchitectures that support CD-ROM booting are PReP and New World PowerMacs. On PowerMacs, hold the c key, or else the combination of Command, Option, Shift, and Delete keys together while booting to boot from the CD-ROM.

If your system doesn't boot directly from CD-ROM, you can still use the CD-ROM to install the system. On NewWorlds, you can also use an OpenFirmware command to boot from the CD-ROM manually. Follow the instructions in Section 5.1.2.1, “Booting NewWorld Macs from OpenFirmware” for booting from the hard disk, except use the path to yaboot on the CD at the OF prompt, such as


0 > boot cd:,\install\yaboot

5.1.2. Booting from Hard Disk

Booting from an existing operating system is often a convenient option; for some systems it is the only supported method of installation.

To boot the installer from hard disk, you will have already completed downloading and placing the needed files in Section 4.3, “Preparing Files for Hard Disk Booting”.

5.1.2.1. Booting NewWorld Macs from OpenFirmware

You will have already placed the linux.bin, yaboot, yaboot.conf, and root.bin files at the root level of your HFS partition in Section 4.3.2, “Hard Disk Installer Booting for NewWorld Macs”. Restart the computer, and immediately (during the chime) hold down the Option, Command (cloverleaf/Apple), o, and f keys all together. After a few seconds you will be presented with the Open Firmware prompt. At the prompt, type


0 > boot hd:x,yaboot

replacing x with the partition number of the HFS partition where the kernel and yaboot files were placed, followed by a Enter. On some machines, you may need to use ide0: instead of hd:. In a few more seconds you will see a yaboot prompt


boot:

At yaboot's boot: prompt, type either install or install video=ofonly followed by a Enter. The video=ofonly argument is for maximum compatibility; you can try it if install doesn't work. The Ubuntu installation program should start.

5.1.3. Booting with TFTP

Booting from the network requires that you have a network connection and a TFTP network boot server (DHCP, RARP, or BOOTP).

The installation method to support network booting is described in Section 4.4, “Preparing Files for TFTP Net Booting”.

Currently, PReP and New World PowerMac systems support netbooting.

On machines with Open Firmware, such as NewWorld Power Macs, enter the boot monitor (see Section 3.6.1, “Invoking OpenFirmware”) and use the command boot enet:0. PReP and CHRP boxes may have different ways of addressing the network. On a PReP machine, you should try boot server_ipaddr,file,client_ipaddr.

5.1.4. PowerPC Boot Parameters

Many older Apple monitors used a 640x480 67Hz mode. If your video appears skewed on an older Apple monitor, try appending the boot argument video=atyfb:vmode:6 , which will select that mode for most Mach64 and Rage video hardware. For Rage 128 hardware, this changes to video=aty128fb:vmode:6 .