[Bug 111507] Unable to detect monitor modes connected to a TB16 Dell dock

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111507

--- Comment #4 from Lionel Landwerlin <lionel.g.landwerlin at linux.intel.com> ---
(In reply to Lionel Landwerlin from comment #3)
> Bisected to :
> 
> commit 4eaceea3a00f8e936a7f48dcd0c975a57f88930f
> Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Date:   Sat Aug 17 02:38:37 2019 -0700
> 
>     drm/i915: Fix DP-MST crtc_mask
>     
>     Each fake MST encoder is tied to a specific pipe. Fix the encoder's
>     crtc_mask to reflect that fact.
>     
>     Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
>     Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
>     Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
>     Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
>     Link:
> https://patchwork.freedesktop.org/patch/msgid/20190817093902.2171-16-lucas.
> demarchi at intel.com

Actually the bisect is probably incorrect. Leaving the laptop/dock alone for
some time seems to make things work.

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