[Bug 27314] displayport link training fails on certain panels (channel equalization fails)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27314

--- Comment #39 from Jérémy Lal <kapouer at melix.org> 2011-05-08 15:39:33 PDT ---
Created an attachment (id=46455)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=46455)
efi iMac12,2 dmesg

Same problem with latest iMac12,2 (27") when booting with efi.
(I had to patch kernel 2.6.38 because of
https://bugzilla.kernel.org/show_bug.cgi?id=23202)

The first attachment is booting with efi, the second booting with bios.
I removed the timestamps from mesg to ease the diff.

EFI : black screen when drm is activated (not before)
BIOS : drm and Xorg work, DRI2 activated.

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