[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 #120 from Oleksij Rempel <bug-track at fisher-privat.net> ---
Hi Jani.
If VGA attached on before power on:
only VGA has image. DP has backlight on, but no image.
xrandr list both displays.
After pressing Fn+F8, display switch button, both screens will work.
After this i get some warnings in dmesg.

If VGA attached after boot, both displays are working OK.

Now i able to test HDMI too. And there some issues as well. For example it is
not automatically detected after cable was attached.

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