I am considering installing Ubuntu 18.04.1 alongside macOS El Capitan. Did you follow a particular guide for installing Ubuntu on the MBA?

Also, when booting Ubuntu via a live USB, before it reaches the Ubuntu splash screen, I get the following error (which does go away):

Couldn't get size: 0x800000000000000e
MODSIGN: Couldn't get UEFI db list
Couldn't get size: 0x800000000000000e
Couldn't get size: 0x800000000000000e

From what I read online, it seems to be related to the kernel. The forum posts are a year old, and the kernel has been updated from the version they are referring to, but the issue seems to remain. What do you think, and have you experienced it?

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