[Bug 105601] DisplayPort does not work with HDMI adapter on Ivy Bridge

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105601

--- Comment #5 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Maxim from comment #4)
> Hi again. Unfortunately, I still have issues with this. I have image on the
> monitor, but it goes black every couple of seconds or so for a second, thus
> impossible to work with. I have such lines in dmesg:
> 
> [266394.619490] [drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7145003f
> [266394.622024] [drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7145003f
> [266394.624561] [drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7145003f
> [266394.627101] [drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7145003f
> [266394.629638] [drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7145003f
> [266394.632165] [drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7145003f
> [266394.634703] [drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7145003f
> [266394.637240] [drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7145003f
> [266394.637254] [drm:drm_dp_dpcd_access] Too many retries, giving up. First
> error: -110
> [266394.637266] [drm:drm_helper_probe_single_connector_modes]
> [CONNECTOR:72:DP-1] disconnected

Those aren't directly related to the blinking. These are in fact normal
messages one would expect during hotplug processing. However they may be a
symptom of the dongle failing somehow and wiggling the hotplug line.

> 
> Can this be fixed or this adapter is impossible to work with?

Can you do:

dmesg -C
wait until the display blink has happened a couple of times
dmesg

and attach the log from dmesg.

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