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Date:      Fri, 5 Sep 2014 11:20:21 -0600
From:      John Nielsen <lists@jnielsen.net>
To:        FreeBSD Current <current@freebsd.org>
Subject:   UEFI display frozen on Retina MacBook Pro
Message-ID:  <9C939A39-79DA-44A7-8C8C-48B6423B50D4@jnielsen.net>

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I have a "MacBook Pro Retina, Mid 2012" (MacBookPro10,1) on which I'd =
like to be able to boot FreeBSD from an external USB drive. For testing =
I've been using the mini-memstick images from the -CURRENT snapshots, =
most recently the one from 20140903.

I am able to select "EFI Boot" on the USB device from the Mac's boot =
menu, and it does _something_, but the screen never changes--the image =
of the boot menu is displayed indefinitely. I think it is actually =
booting since there is drive activity and the caps lock key indicator =
starts working a few seconds in, but the screen just stays the same. =
Thinking the resolution of the Retina display may have been an issue, I =
tried booting with it disabled (lid closed) and an external monitor and =
keyboard. The result was the same--Mac boot menu frozen on the external =
display.

Is there anything I should try to troubleshoot or debug this issue? =
Anything else I should include in a PR? I can test patches if needed =
(probably after building an image including the patch from a VM).

Thanks,

JN




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