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After installing 12.04.01 LTS on a iMac G5, at the boot prompt, the message

not a valid ELF image

prevents me from booting.

Please help.

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Grabbed from here

You may need to download the alternate iso and install it

once done please follow the steps

  • Install PPC via CLI cli-powerpc641
  • Use as mirror for repository
  • Finish installer & reboot
  • Login via command line and install ubuntu desktop using sudo apt-get update && sudo apt-get install xorg ubuntu-desktop
  • Reboot
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