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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [snb efi gmux] imac 12,1 blank screen upon booting"
href="https://bugs.freedesktop.org/show_bug.cgi?id=59431#c22">Comment # 22</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [snb efi gmux] imac 12,1 blank screen upon booting"
href="https://bugs.freedesktop.org/show_bug.cgi?id=59431">bug 59431</a>
from <span class="vcard"><a class="email" href="mailto:seth.forshee@canonical.com" title="Seth Forshee <seth.forshee@canonical.com>"> <span class="fn">Seth Forshee</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=59431#c21">comment #21</a>)
<span class="quote">> Hi Seth,
>
> the output is:
> bios vendor: Apple Inc.
> system product name: iMac12,1</span >
Rats, it turns out there's more information required. If you can boot into OS X
and run the following command in a terminal, it's supposed to give all the
required information.
sudo ioreg -lw0 |grep manufacturer|cut -b25-80;sudo ioreg -lw0|grep
"product-name"|cut -b 25-80;sudo dtrace -qn 'BEGIN{boot_args=((struct
boot_args*)(`PE_state).bootArgs);printf("FrameBuff erBase:
0x%08x\nPixelsPerScanLine: %d\nHorizontalResolution: %d\nVerticalResolution:
%d", boot_args->Video.v_baseAddr, boot_args->Video.v_rowBytes/4,
boot_args->Video.v_width, boot_args->Video.v_height);exit(0)} '
<span class="quote">> Could that also explain why X is not working?</span >
I don't know much at all about X, but I suspect it might be at least
contributing. Maybe X is also trying to use the Intel graphics based on the
same information.</pre>
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