[Nouveau] trouble connecting to Panduit VGA adapter

Ilia Mirkin imirkin at alum.mit.edu
Mon Sep 4 17:23:31 UTC 2017

Does v4.13 fix your issues? v4.10 also included significant rework
related to DP-MST, and I wouldn't be surprised if it fixed a few DP
issues along the way. (Also, please don't drop the list from your

On Mon, Sep 4, 2017 at 9:30 AM, Marko Schuetz-Schmuck
<MarkoSchuetz at web.de> wrote:
> I'm running 4.9.43-1-MANJARO
> Ilia Mirkin <imirkin at alum.mit.edu> writes:
>> Are you running a v4.12-based kernel? If so, update to v4.13-rcN or
>> integrate https://github.com/skeggsb/linux/commit/13a86519202c5d119d83640d6f781f3181205d2c
>> into your kernel build.
>> On Fri, Sep 1, 2017 at 12:50 PM, Marko Schuetz-Schmuck
>> <MarkoSchuetz at web.de> wrote:
>>> I want to connect to an InFocus projector that sits behind a Panduit VGA
>>> adapter. I use a Thinkpad P51 with a mini display-port to VGA
>>> converter. The laptop runs Manjaro and has the
>>> video-hybrid-intel-nouveau-prime installed and it works with other
>>> monitors. For some reason it does not detect the projector that is
>>> connected through the Panduit. The keyboard shortcut to switch monitor
>>> configuration says "No External Display". xrandr reports only the
>>> built-in screen.
>>> I talked to the technician for the room installation and he told me that
>>> he had seen this before on a Ubuntu machine and that switching to the
>>> proprietary nvidia driver solved that problem. For various reasons I'd
>>> rather not switch to that driver.
>>> I also found some lines with "DRM: DDC responded, but no EDID for DP-1"
>>> in them from around the time I tried connecting to the projector. Could
>>> they be related?
>>> Is there some setting or configuration that can help in this case?
>>> Best regards,
>>> Marko
>>> _______________________________________________
>>> Nouveau mailing list
>>> Nouveau at lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/nouveau
> --
> Prof. Dr. Marko Schütz-Schmuck
> Department of Mathematical Sciences
> University of Puerto Rico at Mayagüez
> Mayagüez, PR 00681

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