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I googled a while on this so let me give you the details, then the questions

  • I have a Macbook 8,2 15" with Kubuntu Quantal installed from the MAC+AMD64 Desktop CD image. I removed every MacOS partition on install and created GPT-swap-EXT4(/)-EXT4(/local).
  • lspci | grep VGA only shows an AMD 6600 Series card, so I guess I'm need to configure EFI-booting to be able switch to the low power Intel card.
  • I found a package called grub-efi-amd64 as well as this tutorial, the latter seems outdated as it suggest compiling grub 1.99 by hand which is also contained in the package I found.

I would kindly ask for clearification on the following:

  • Can I just apt-get install grub-efi-amd64 or is there more to be done (Only Kubuntu on the machine, so grub will do fine - Does it still need to be "blessed" as per the tutorial).
  • Does the package work through it all or do I still have to go through steps 3-7 of the tutorial?
  • The GPT partition only has 4 MiB. Do I have to enlarge it?
arney
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2 Answers2

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The tutorial you refer to in your question seems quite outdated.

Grub has had native EFI support since at least 2-3 official standard releases of Ubuntu.

To run your Mac in EFI mode i simply installed refind then boot the mac on a usb key with the standard ubuntu64, selecting the EFI boot option in refind for the Ubuntu installer. a more detailed tutorial can be found here that also deals with some potential issues.

I use Ubuntu with my Macbook 8,2 15" and successfully switch between the two cards. I wrote a howto for the actual switching here

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tomodachi
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  • Okay, mine is MacBook Pro and the problem is same with raring ubuntu and kubuntu amd64 dessktop ISOs. As I see it, rEFInd would boot GRUB which boots Linux. So why should that work whereas booting GRUB directly from EFI gives black screen? – arney May 03 '13 at 11:14
  • As the link in the post describes you boot the kernel directly from refind bypassing grub entirely. I've updated the post with a link for a detailed efi install faq answering the black screen issue – tomodachi May 03 '13 at 11:44
  • Okay, I just managed to grub boot into raring by disabling the discrete GPU - only to find that you cannot run an external display on the iGPU :-( So you're solution is the way to go. – arney May 03 '13 at 13:15
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Kubuntu Raring ISO now offers UEFI installs.

Boot the UEFI installer, GRUB comes up, hit e to edit the entry, insert nomodeset right after quiet splash so your screen doesn't go black, then hit F10 to boot and your good to go.

arney
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  • Only to realize: Installer GUI will work, but Live CD mode gives a black screen. Same after install: Screen is on but doesn't show anything. – arney May 03 '13 at 11:10