[Bug 106250] Regression with Dell TB16 dock and Linux kernel 4.16.x

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106250

--- Comment #15 from Stanislav Lisovskiy <stanislav.lisovskiy at intel.com> ---
It has been confirmed that correspondent uevent is delivered to the userspace
by observing correspondent traces in ddx sna_handle_events gets uevent which is
then analyzed by sna_mode_discover which in turn sends the randr notification
(RRTellChanged, RRCrtcNotify) to xserver clients. In non-buggy case we get a
message ProcRRSetScreenConfig from the desktop clients in response, which then
triggers modeset(drm_mode_setcrtc). 
However this doesn't happen for some reason when bug happens, despite that DRM
connector state is the same as in non-buggy case.

After discussion with Martin, made a decision that this bug can be closed as
non-fixable at least from kernel side and correspondent bug filed for
gnome-desktop/Ubuntu.

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