Date: Fri, 5 Sep 2014 11:37:21 -0600 From: John Nielsen <lists@jnielsen.net> To: Glen Barber <gjb@FreeBSD.org> Cc: FreeBSD Current <current@freebsd.org> Subject: Re: UEFI display frozen on Retina MacBook Pro Message-ID: <97975F21-B733-4549-8ED8-8E86CBE6DEA7@jnielsen.net> In-Reply-To: <20140905173019.GF36287@hub.FreeBSD.org> References: <9C939A39-79DA-44A7-8C8C-48B6423B50D4@jnielsen.net> <20140905173019.GF36287@hub.FreeBSD.org>
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On Sep 5, 2014, at 11:30 AM, Glen Barber <gjb@FreeBSD.org> wrote: > On Fri, Sep 05, 2014 at 11:20:21AM -0600, John Nielsen wrote: >> 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. >>=20 >> 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. >>=20 >> 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). >>=20 >=20 > To be clear, which boot menu do you see? If you see the FreeBSD = loader > menu, escape to the loader prompt and try: >=20 > set kern.vty=3Dvt > set hw.vga.textmode=3D1 > boot >=20 > I am a bit unclear under which conditions 'hw.vga.textmode=3D1' is > required, though. No, I don't ever see the FreeBSD loader. I see the menu you get on a Mac = when you hold down the option (alt) key while booting--big disk icons = representing the bootable disks/partitions in the system. In my case it = was the "Macintosh HD" volume (Mac OS Mavericks), my Windows partition, = and the USB stick with the FreeBSD memstick image on it, which the Mac = just called "EFI Boot" (and the icon was that of a USB disk). There is = also a little section at the bottom that allows wifi network booting (if = you've done all the black magic (not PXE) to get that to happen). It = shows a circular activity animation while it scans for wireless = networks. That animation stops when I select the USB EFI icon and press = enter (and that is the only visual indication I get that I made a = selection). JN
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