[Bug 48652] [IVB CPU eDP] local flat panel stays blank, workaround: intel_iommu=igfx_off

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=48652

--- Comment #128 from Oleksij Rempel <bug-track at fisher-privat.net> ---
Hi, tested yesterdays drm-intel-nightly with hope this patch will fix it:

commit 52e1e223456e3aa747e9932f95948381f04b3b26
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Mon Oct 21 10:52:07 2013 +0300

    drm/i915/dp: workaround BIOS eDP bpp clamping issue


suddenly it is not.
Right now i found one more way to bring eDP up. After start i can open
gnome-control-center, display setting and press save. No changes needed. It
will reenable eDP. Output of xrnadr --verbose, before and after this action,
differs only here:
<     CRTCs:      1 0 2
---
> 	CRTCs:      0 1 2

will it help?

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