[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 #69 from Guilherme Amadio <guilherme.amadio at gmail.com> ---
Hi,

Has anyone been able to get KMS working on a 27" iMac?

I have an iMac 11,1 and I cannot get X to work. Documentation
is scarce, so I don't know how to discover what is the problem.
When I start X, it doesn't show any errors, but I get a blank
screen. Same for when I insert the radeon module with kms on.
I suspect that the EDID is not being handled correctly. Does
any of you know how I can create an external EDID for a 2560x1440
monitor? My video card is an ATI Radeon HD 4850, by the way.

I'd appreciate any help. I'm using linux 3.10, and can post dmesg,
Xorg.0.log, etc. I'd also happily live with a non kms setup, but
recent X seems to require kms...

Thank you,

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