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Richard Ayotte
Asked: 2012-10-19 17:34:54 +0800 CST

How do I EFI boot Zenbook Prime UX31A from built-in card reader?

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How do I EFI boot Zenbook Prime UX31A from built-in card reader?

Ubuntu Live 12.10 64bit has been copied onto an a SD card which I'm trying to boot from. When I power on my Zenbook and press ESC for the boot menu, the SD card isn't listed as an option. The only device in the list is the internal SDD drive.

There is an "Add boot option" in the BIOS but it requires a few a things that I'm not quite sure of.

  1. Add boot option - I guess any identifier works here. I've been entering ubuntu.
  2. Select Filesystem - The only option available is PCI(1F|2)\DevicePath(Type 3, SubType 12)HD(Part1,Sig787e6287-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
  3. Path for boot option - I've been entering ubuntu:\EFI\BOOT\BOOTx64.EFI

Then I select Create and the new boot option appears in the boot menu but the newly created boot option still points to the internal SDD.

boot

2 Answers

  1. Same problem here with a Zenbook UX330C. i've been doing flips and spins to make the laptop boot off the SD card in the built-in reader, but no dice. I've OLS'd (On Line Searched; I prefer not to publicize search engines) all what I could find for SD card booting in general and Zenbook SD card booting in particular, but I've found zero solutions. I've tried to found my UEFI's specs, but no relevant information found.

    Finally my conclusion is: Asus Zenbooks' BIOS/UEFIs aren't able to boot off built-in SD card slots. Period. Unless someone can prove me wrong, which I'd be very glad of.

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    1. you must install Ubuntu 64bit, not the 32bit (because it is not EFI compatible)
    2. the path should be /efi/ubuntu/grubx64.efi
    3. If still not good, please connect your SD card, then indicate your Boot-Info URL.
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