[Bug 59113] [IVB DP] Banded colors/reduced depth over Thunderbolt on Mac Mini Server 2012 (6,2)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59113

--- Comment #17 from Jason Heeris <jason.heeris at gmail.com> ---
Aha! I found that issuing this command seems to fix the problem:

$ sudo intel_reg_write 0x70008 0xC4002000

I found it here:

http://ubuntuforums.org/showpost.php?p=12523426&postcount=3

...which references bug #46800:

https://bugs.freedesktop.org/show_bug.cgi?id=46800

...and this email:

http://lists.freedesktop.org/archives/intel-gfx/2012-February/015395.html

Hope that helps. I have no idea whether this is safe to do, though.

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