[Bug 755093] Review Request: mactel-boot - boot tools for Intel Apple hardware

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https://bugzilla.redhat.com/show_bug.cgi?id=755093

--- Comment #25 from Chris Murphy <bugzilla@xxxxxxxxxxxxxxxxx> 2011-12-07 17:49:53 EST ---
Interesting. I'm not sure if this file is significant for EFI boot or CSM-BIOS
or both or neither. Just today for the first time I am (was) able to get an EFI
boot with X starting up (anaconda from F16 DVD, and gnome from the resulting
installation). On a MBP 4,1, previous attempts resulted in display hang as
described in bug 751147. It's been a while, but in previous attempts I'm pretty
sure they were bare disks and the Firmware.scap file could not have been
present if true.

Today's attempt is on a MBP4,1 with this Firmware.scap file on its EFI System
partition.

However, the problem I'm now having after one successful boot and startup to
Gnome's login window (and logging in then rebooting) is that without any
changes I can't get a successful boot+startup to a gnome login. I get a
different boot experience each time, usually a hang in GRUB Legacy which I can
ESC from to reload GRUB but subsequent boots fail the same way.

The second most frequent boot experience is failure to unpack initramfs
followed by a kernel panic. And the one after that, completely black screen but
apparently a successful boot as I was able to blindly switch to F2 tty shell,
login as root, save dmesg to file and reboot.

Getting such wildly different boot results while not seemingly changing any
parameters, is making testing very difficult.

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