[Bug 73530] Asus U38N: Black screen with Radeon driver in Linux 3.10, 3.11 and 3.12

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73530

--- Comment #35 from Alex Deucher <agd5f at yahoo.com> ---
Created attachment 92230
  --> https://bugs.freedesktop.org/attachment.cgi?id=92230&action=edit
possible fix

There's nothing in your logs indicating a link failure when setting up the DP
link.  It seems like your panel is just especially picky about the timing in
the link training or something like that.  Try the attached patch.  I've also
pushed a branch with some other DP related patches that might help if you want
to try it:
http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-3.14-wip

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