[Bug 107845] Problems with (tiled) MST display (Dell UP3214Q)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107845

--- Comment #5 from Paul Menzel <pmenzel+bugs.freedesktop at molgen.mpg.de> ---
The messages below jump out, though that is already quite a while after the
i915 is executed.

```
[   16.753610] [drm:intel_pch_type [i915]] Found SunrisePoint PCH
[…]
[   43.195398] [drm:gen8_de_irq_handler [i915]] hotplug event received, stat
0x00800000, dig 0x10121010, pins 0x00000080, long 0x00000080
[   43.195407] [drm:intel_hpd_irq_handler [i915]] digital hpd port D - long
[   43.195414] [drm:intel_hpd_irq_handler [i915]] Received HPD interrupt on PIN
7 - cnt: 0
[   43.195459] [drm:intel_dp_hpd_pulse [i915]] got hpd irq on port D - long
[   43.195492] [drm:i915_hotplug_work_func [i915]] running encoder hotplug
functions
[   43.195505] [drm:i915_hotplug_work_func [i915]] Connector DP-2 (pin 7)
received hotplug event.
[   43.195516] [drm:intel_dp_detect [i915]] [CONNECTOR:86:DP-2]
[   43.195561] [drm:intel_dp_detect [i915]] MST device may have disappeared 1
vs 1
[   43.203953] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.212342] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.220730] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.229117] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.237505] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.245893] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.254281] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.262668] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.271056] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.279444] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.287831] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.296219] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.304607] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.312994] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.321382] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.329770] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.338157] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.346545] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.354932] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.363320] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.371707] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.380095] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.388483] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.396872] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.405260] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.413649] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.422037] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.430424] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.438812] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.447199] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.455587] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.463975] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x7c2003ff
[   43.463979] [drm:drm_dp_dpcd_access [drm_kms_helper]] Too many retries,
giving up. First error: -110
```

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