[Bug 60263] [IVB] Apple DP to dual link DVI: [drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=60263

--- Comment #20 from Nicolas Suzor <nic at suzor.com> ---
(In reply to comment #15)
> Mika, I don't see this patch on the m-l. Daniel, get the extra long cattle
> prods!
> 
> Nicolas, can you attach a drm.debug=6 dmesg for the case where it only works
> upon hotplugging?

So the different behaviour occurs based on whether I start X before or after
plugging in the DVI-D DL dongle. If I plug it in before starting X, it does not
correctly detect the higher resolutions, and I am unable to force it to do so
by adding the modeline via xrandr. If I plug it in after starting X, it works
as expected.

I have attached four files: xrandr and dmesg outputs from both cases.

I just realised that I had drm.debug=0xe, not drm.debug=6. If this is a
problem, let me know and I'll reboot to try again.

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