[Bug 70132] [sna igb] multihead output stopped working

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70132

--- Comment #21 from Chris Wilson <chris at chris-wilson.co.uk> ---
Ah, I see the difference. The mode reported by the EDID has hsync/vsync flags,
the currently active mode reported by the kernel does not.

I think this should fix up my mistake in adding the current CRTC mode to the
output list:

commit 33be42bf509b6d57face6b8d99d72dd5f6c90900
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Sun Oct 20 09:03:47 2013 +0100

    sna: Fix the addition of the current output Mode to the probed lists

    We need to add the current mode to the Modes list and not directly to
    the output->probed_modes as that gets overwritten.

    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

But I fear the root cause is much deeper in the kernel. Can you please attach a
drm.debug=6 for the boot sequence so we can try and spot where the flags
disappear?

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