Re: Please explain X strangeness

2010-10-02 Thread Camaleón
On Fri, 01 Oct 2010 14:56:04 -0400, Mark Neidorff wrote:

(...)
  Yesterday, I unhooked the 3rd PC
 from the monitor (but left the cable hooked to the monitor with an
 unattached end).  Today when I tried to start X, even when I see the
 output of the debian box on the monitor, I got an out of range error. 
 Tapping ctrl-alt-backspace restarts X, but does not allow X to start. 
 Here is the part I would like an explanation forI pulled the video
 cable (that is attached to nothing) off of the connector on the monitor,
 tapped ctrl-alt-backspace, and X started just fine.  Why does the
 presence of a disconnected cable give X a problem?

In brief, you are experiencing weirdnesses with a headless system and 
your xorg/vga drivers/monitor, right?

I would start by reviwing the Xorg log file (/var/log/Xorg.0.log) to get 
any clue. You can upload its whole content (it does not contain sensitive 
data) to any online service such www.pastebin.com.

Greetings,

-- 
Camaleón


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Please explain X strangeness

2010-10-01 Thread Mark Neidorff
Hi all,

Debian Lenny system patched up using nvidia driver.  I have a KVM switch 
because I am setting up a new machine.  Normal behavior is that X starts just 
fine  if the Debian box has KVM focus as it boots.  If it doesn't have 
focus (I see the video from the other computer on the screen) the I get an 
out of range error on the screen.  A quick ctrl-alt-backspace restarts the 
X server and everything is fine.  Recently, I've gotten a 3rd PC to setup.  
Since my monitor has multiple video inputs, I hooked the 3rd PC to video2 on 
the monitor.  Yesterday, I unhooked the 3rd PC from the monitor (but left the 
cable hooked to the monitor with an unattached end).  Today when I tried to 
start X, even when I see the output of the debian box on the monitor, I got 
an out of range error.  Tapping ctrl-alt-backspace restarts X, but does not 
allow X to start.  Here is the part I would like an explanation forI 
pulled the video cable (that is attached to nothing) off of the connector on 
the monitor, tapped ctrl-alt-backspace, and X started just fine.  Why does 
the presence of a disconnected cable give X a problem?

Thanks for any insight.

Mark


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