[lug] Triple monitor issue

Steven A Hart steven.hart at colorado.edu
Wed Apr 5 09:07:23 MDT 2017

Hmm  might have figured out my own problem.  The motherboard itself
supports triple monitors according to the manual and it does have an
onboard full display port available.  I'll take the nvidia card out of the
loop and give the display port a try.  Hopefully that will play nice!



On Wed, Apr 5, 2017 at 6:06 AM, Davide Del Vento <davide.del.vento at gmail.com
> wrote:

> Aw, computers...
> This might not help you much, but I have a laptop with a docking station
> and I run Mint 17.3
> I have two external monitors connected to the docking station plus the
> laptop screen itself, and all 3 works fine (I am not sure if the docking
> station has some graphic card hardware inside, but I doubt it). On a
> previous model of laptop I had some troubles and it turned out that I could
> not dedicate enough memory to the graphic card(s) to have all 3 monitors
> work properly.
> To rule out this possibility, I suggest you try to configure all your
> monitors to the lowest resolution you can (yes, that would look bad,
> especially on fixed-resolution LCD) and see if, besides the resolution
> issues, everything works fine. If so, you know your problem is likely
> graphic memory. If the problem still occurs, memory is not your concern.
> On Tue, Apr 4, 2017 at 9:42 PM, Steven A Hart <steven.hart at colorado.edu>
> wrote:
>> I'm looking for ideas on a problem I stumbled across.  I have two
>> monitors connected to my Linux Mint 18.1 Cinnamon system and all works
>> well.  One monitor is connected to the onboard HDMI port, the other to the
>> onboard DVI port.  Both run off the Intel Core i7-4790 Haswell GPU.  My
>> motherboard is an ASRock Z97 Extreme6 LGA 1150 Intel Z97.
>> I decided I wanted one more monitor added so I threw in a PCI NVIDIA GTX
>> 8400 card and plugged the third monitor into the cards HDMI port.  Things
>> get very confused when I try to use the NVIDIA drivers so I stuck with the
>> Nouveau drivers and things improved a bit.  I was finally able to get all
>> three running but noticed some ghosting of the mouse pointer.  When the
>> third monitor is turned off and unplugged from the PCI card, the first two
>> original monitors go haywire and will not return to the original
>> configuration.  They do a weird half screen shift.
>> Has anyone tried doing this with Mint 18.1?  Any suggestions to get all
>> three happy without any ghosting refresh issues?
>> Thanks
>> Steve
>> --
>> Steve Hart
>> Systems Administrator
>> Colorado Center for Astrodynamics Research
>> University of Colorado Boulder
>> Steven.Hart at colorado.edu
>> (303)492-8109 <(303)%20492-8109>
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Steve Hart
Systems Administrator
Colorado Center for Astrodynamics Research
University of Colorado Boulder
Steven.Hart at colorado.edu
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