[Bug 56834] [ivb DP dual link DVI dongle] [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=56834

--- Comment #12 from Daniel Vetter <daniel at ffwll.ch> ---
(In reply to comment #11)
> I am experiencing the same issue. Also Ivy Bridge HD 4000 (i7-3667U).
> I am using an Apple Mini Displayport to VGA adapter.
> 
> xrandr -q doesn't show any modes. But if I add a mode e.g. xrandr --newmode
> DP1 1024x768  && xrandr output DP1 --right-of eDP1 --mode 1024x768 it works.
> 
> The problem appeared with kernel 3.7.4, everything works fine with 3.6.11.
> 
> libdrm version is 2.4.41, but I've also tried the actual version directly
> from git.
> xf86-video-intel is 2.20.19

Different adapter, so might be different bug. Until we know for sure it's
simpler to keep a separate report. Mathias, can you please file one with
drm.debug=0xe dmesg when the issue happens and the above details.

If you can bisect in addition where your regression has been introduced, that
would be really helpful in tracking down the bug ...

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