Intel Atom detecting a second monitor that doesn't exist.

[Kevin Daly]

When booting on an Intel Atom machine I have, xorg reports it detects 2
monitors, but I only have one monitor connected.

The problem is that the login screen seems to be on the second "Non
existent" monitor. So the machine is completely unusable.

The motherboard only has one monitor output.

This is with the intel i915 driver

-- 
============================
Kevin Daly
[phone]s

[poma]

On 21.03.2013 19:45, Bill Davidsen wrote:
>  Kevin Daly wrote:
> > When booting on an Intel Atom machine I have, xorg reports it detects 2
> > monitors, but I only have one monitor connected.
> >
> > The problem is that the login screen seems to be on the second "Non
> > existent"
> > monitor. So the machine is completely unusable.
> >
> > The motherboard only has one monitor output.
> >
> > This is with the intel i915 driver
> >
>  It is probably not directly related to the ATOM, I have an ASUS netbook
>  with the 510 CPU using the 915 driver, a firewall box based on micro-ATX
>  and another 510, same driver, and neither shows a phantom video device.
>  
>  Do you get boot information on the mobo console output? If so you at
>  least will be able to edit the boot command line. On small systems like
>  laptops and tiny utility boxen I often have to add 'nomodeset' to the
>  boot command line, or even remove rhgb to get a boot.
>  
>  Clearly you are seeing something as it boots, or you wouldn't see the
>  xorg lines (unless you are coming in from another system post boot).
>  
>  Any additional info might be useful, I can only say the ATOM doesn't
>  have a generic problem with Linux or Fedora. I have one other ATOM box,
>  it runs headless, so I don't remember what the console driver was, other
>  than 'working.'
>   
Probably related to the nonexistent internal panel - LVDS1.
/boot/grub2/grub.cfg:
linux	/vmlinuz-… video=LVDS-1:d,
eventually i915's param - panel_ignore_lid.

poma

[Bill Davidsen]

Kevin Daly wrote:
>  When booting on an Intel Atom machine I have, xorg reports it detects
> 2
>  monitors, but I only have one monitor connected.
>
>  The problem is that the login screen seems to be on the second "Non existent"
>  monitor. So the machine is completely unusable.
>
>  The motherboard only has one monitor output.
>
>  This is with the intel i915 driver
>  
It is probably not directly related to the ATOM, I have an ASUS netbook with the 
510 CPU using the 915 driver, a firewall box based on micro-ATX and another 510, 
same driver, and neither shows a phantom video device.

Do you get boot information on the mobo console output? If so you at least will 
be able to edit the boot command line. On small systems like laptops and tiny 
utility boxen I often have to add 'nomodeset' to the boot command line, or even 
remove rhgb to get a boot.

Clearly you are seeing something as it boots, or you wouldn't see the xorg lines 
(unless you are coming in from another system post boot).

Any additional info might be useful, I can only say the ATOM doesn't have a 
generic problem with Linux or Fedora. I have one other ATOM box, it runs 
headless, so I don't remember what the console driver was, other than
'working.'

-- 
Bill Davidsen <davidsen(a)tmr.com&gt;
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot