Hi,
The Live LinuxCNC distro doesn't have or create an xorg.conf file.  Other
postings on the web suggest that this was disposed of in some distributions
in favour of xrandr and/or probing on startup everytime.

You're right though, it does appear like there is a default 1920x1080
desktop size.  Since my monitor does max 1280x1024 at 75Hz the auto align
feature can't do much with it.

This link 
https://askubuntu.com/questions/377937/how-to-set-a-custom-resolution
results in the failed to get size of gamma error.
And this link
https://forums.linuxmint.com/viewtopic.php?t=202637
which seems to suggest this is linked to the type of video driver.  Given
that I'm using the on board VGA source and whatever driver installed I'd
guess this is actually the first place to start.
I have two different video cards on hand but neither fit in this older
motherboard.

I have to leave this for a while and get some work done but I'll report back
when I find out more.
John

> -----Original Message-----
> From: jrmitchellj . [mailto:jrmitche...@gmail.com]
> Sent: October-17-17 8:06 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] PC MB for Linux.
> 
> I first ran into this problem when I started building a new system with
the
> latest live iso, based on Debian.  It worked as expected on Ubuntu 10.04.
> 
> There seems to be multiple issues happening.
> From what you describe, it seems that the system is expecting a wide
(16x9)
> display.  There may be a setting in the display widget for this. If not ,
> you may need to dig into the xorg.conf file.  I set up my machine on a
16x9
> monitor, then moved it to the shop that has a low resolution 4x3 monitor,
> so I had to change that setup.
> Next,check to see if the monitor has an "auto align" or similar in it's
> menus.  If so, run it.  It will adjust the monitor to what the computer is
> sending it.  Magic!
> 
> The next issue I ran into was Axis display much taller than the display.
> For that I had to edit the hidden .axisrc file in the home directory.
> Finding information on that was difficult.
> In that file, there will be a line like:
> 1 root_window.tk.call("wm","geometry",".","1270x970+5+0")
> That sets the size & location of the Axis window on startup.  That example
> is what I have set for my liking.  The four numbers are: height, width,
> from left, from top.  My display is a 4x3, 1280 x1024.
> So I made the Axis display a bit smaller than the display area of the
> monitor.
> In adjusting this, I found that about 100 lines are off the bottom of my
> display.  I haven't had time to chase that down yet, I just tweeted the
> .axisrc file to get it to fit.
> 
> A bit log winded, so I hope this is the information you were looking for!
> 
> --J. Ray Mitchell Jr.
> jrmitche...@gmail.com
> 
> 
> 
> The dogmas of the quiet past, are inadequate to the stormy present. The
> occasion is piled high with difficulty, and we must rise with the
occasion.
> As our case is new, so we must think anew and act anew. We must
disenthrall
> ourselves, and then we shall save our country.*Abraham Lincoln
> <http://www.quotationspage.com/quotes/Abraham_Lincoln/>*, *Annual
> message
> to Congress, December 1, 1862*
> *16th president of US (1809 - 1865)*
> 
> On Tue, Oct 17, 2017 at 12:19 AM, John Dammeyer
> <jo...@autoartisans.com>
> wrote:
> 
> > I have one more question which possibly relates to this motherboard and
the
> > Live LinuxCNC:
> > linuxcnc-2.7-wheezy.iso
> >
> > Is it just the on board video or is it a general problem with Debian
LXDE
> > desktop?  I've seen complaints on the Pi Forums from a year ago on
desktop
> > size.  There are lots of other hits where people are complaining but not
> > much in the way of solutions.
> >
> > An example is here:
> > http://www.autoartisans.com/cnc/LXDE_BigDesktop.jpg
> >
> > The monitor appears to be a window into a much larger desktop.  I've
seen
> > this on the Beagle when I put a 1080P monitor on it.  The GEAR graphic
is
> > round.  On a smaller monitor where it's been squeezed onto the monitor
it's
> > no longer round.  Same with the swirly thing that is part of the default
> > background.  Round on this LinuxCNC install.  Round on the Beagle with
> > 1080P
> > but oval with the Beagle on a smaller monitor.  The Beagle Linux appears
to
> > work as expected.
> >
> > In the above screen grab example you can see the drop down menu is off
the
> > screen as is half the file system explorer.  I've fixed the panel so
it's
> > narrower by setting it to 95% and there's the rub so to speak.  If 95%
> > makes
> > it just a bit narrower then clearly the system must know how much is
> > visible
> > but the desktop itself appears to be 1920 wide with a height of 1080.
> >
> > After much searching I found a number of explanations on how to change
this
> > and none of them worked.  Either the programs weren't there or they
didn't
> > really address what seems to be a simple problem.
> >
> > How do I tell the system that I want the desktop to be the same size as
the
> > monitor?
> >
> > When I run LinuxCNC  Config Picker and then run say the parallel port
Inch
> > Version the AXIS window doesn't fit.  The bottom is below the screen.
So
> > it
> > must think it's on a bigger desktop too?
> >
> > Is this a Motherboard Video controller issue with Linux thinking it's a
> > bigger screen or is it configuration issue?
> >
> > Thanks
> > John
> >
> >
> >
> >
>
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