Help with display management

[Kevin O'Gorman]

On Sat, Jul 4, 2015 at 11:45 PM, Petter Adsen <petter at synth.no> wrote:

> On Sat, 4 Jul 2015 15:56:59 -0700
> "Kevin O'Gorman" <kogorman at gmail.com> wrote:
>
> > I'm running xubuntu 14.04 LTS, and have just replaced my mobo and
> > graphics card with a new ASUS Z97 deluxe with onboard graphics.  The
> > old card was nVidia, the mobo uses Intel graphics.
> >
> > When I restarted the machine after the mobo-ectomy, xubuntu would only
> > recognize 2 of my 3 monitors.  The mobo advertises it can support 3
> > with resolutions up 'way beyond my actual HD monitors.  I created
> > some space, and installed a fresh copy of xubuntu 14.-4.2.  It works
> > fine.  I've removed all nVidia things from the old system, but it's
> > still broken.
> >
> > In both installs, both new and old, I can try to manage the monitors
> > with the whisker menu's action item (at the bottom) for "All
> > settings", with a gadget called "Display".  I don'[t know the proper
> > names of the packages that provide these things, but I hope it's
> > clear.
> >
> > So I either have to replicate my other configurations in the new
> > install, or somehow figure out what's broken in the old one.  I'd
> > prefer the latter, if possible.
> >
> > Details of what's wrong:
> > The Display gadget shows 3 monitors, HDMI1, HDMI2 and ACI23" -- and
> > these are arranged physically left to right on my tabletop.  They are
> > all three the same model of monitor.  Normally, I have HDMI1 and
> > HDMI2 working.  If I try to mark the 3rd monitor's "Use this output"
> > then one of the first two will go dark.  I cannot get it to use all
> > three at once.
> >
> > I don't know why they're called what they are since all three
> > moniotors are identical.  What's oddest is that the one that's marked
> > ACI23" is the only one that is actually HDMI at the computer end.
> > The others are a DP and mini-DP connector.
> >
> > This is a configuration problem and not a hardware problem.  I know
> > this because the fresh install of 14.04 does not have this
> > limitation, and works fine with all three monitors.
> >
> > So what do I do to get the three monitors?  Probably just ditch a
> > config file somewhere, but which one?
>
> First off, congratulations on your new motherboard :)
>
> Could you send your /var/log/Xorg.0.log file (from both installs), or
> paste it somewhere and send a link? The output of 'xrandr' might also
> come in handy. If /etc/X11/xorg.conf exists, then send that too, but
> also try moving it out of the way and restart X to see if that works.
>
> Then we'll go from there.
>
> Petter


First, the xorg.0 from the clean new OS
https://docs.google.com/document/d/1OmCbInMkcIZtKVpuUxBMJmXyK9jc3CEuGUf9WATZQxM/edit?usp=sharing

Then the xorg.0 from the old broken OS
https://docs.google.com/document/d/1AhCFgtoZRvLof-TODyvfHLfN4E7pXBVIjqIkhvwbZKY/edit?usp=sharing

Neither system has an xorg.conf in /etc/X11 -- it that where it would be?


-- 
Kevin O'Gorman
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