10.04 won't boot without monitor / keyboard (headless)

[herrison]

I have several computers, both Ubuntu and windows xp. I have just put 10.04 onto a computer that I propose to boot without a monitor and to access from elsewhere using vinagre / vnc.
Having installed 10.04 (and very nice it is too!), the computer will not boot without a monitor attached. After powering up and attaching a monitor, I see a black screen that requires a hard power-down to escape from. Boots fine with a monitor attached, thereafter I can detach the monitor and vinagre fine.
I have reviewed this machine's bios (an HP desktop) and see no mention of suspending boot on no monitor.
I have replaced the /etc/X11/xorg.conf file with the failsafe and have edited and updated the grub conf file to "quiet" as recommended elsewhere. No joy.
I gather that this may be related to a monitor test that's performed when x starts up.
Thanks in advance for all help. I can see that there are a quite a few threads on this subject over the last year.

[croco001]

I have the exact same problem.

Bug in launchpad : https://bugs.launchpad.net/ubuntu/+s...au/+bug/568079

I found a fix , that work well for me. I restored an old xorg.conf file from my previous installation (8.04) and now, i can boot without monitor.


This is my xorg.conf, if that can help someone.

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 1.0 (buildd@palmer) Sun Feb 1 20:21:04 UTC 2009


Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection

Section "ServerFlags"
Option "Xinerama" "0"
EndSection

Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection

Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "CRT-1"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
EndSection

Section "Device"
Identifier "Default Device"
Driver "nvidia"
Option "NoLogo" "True"
EndSection

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro FX 500/FX 600"
EndSection

Section "Screen"
Identifier "Default Screen"
Device "Default Device"
Monitor "Monitor0"
EndSection

Section "Screen"

# Removed Option "metamodes" "nvidia-auto-select @1024x768 +0+0"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "TwinView" "0"
Option "metamodes" "nvidia-auto-select @1024x800 +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection

[digitalencore]

No luck for me.. Can you explain further how to solve the issue?

[digitalencore]

Has anyone try reconfigure the xorg.conf to be the basic configuration as follows:
Section "Device"
Identifier "VNC Device"
Driver "vesa"
EndSection

Section "Screen"
Identifier "VNC Screen"
Device "VNC Device"
Monitor "VNC Monitor"
SubSection "Display"
Modes "1024x768"
EndSubSection
EndSection

Section "Monitor"
Identifier "VNC Monitor"
HorizSync 30-70
VertRefresh 50-75
EndSection

[cyanics]

Bump.

I am also having the same problem. Did an upgrade form a very stable 9.10 to 10.04 last night. It hosed my boot up. Upon reattaching KVM, it immediately rebooted up to the new gui. When i detached and rebooted, it was borked again.

I did a fresh install of 10.04 and was able to get it to work correctly, with no KVM attached, but without the monitor, it won't start GDM. I use GDM for some graphical network monitoring tools.

VNC works fine.

[ceo51378]

Bump. I'm having the same issues as well with 10.04.

[fruitytuter]

here's a simple hardware solution that causes computer to recognize a fake monitor, all you need is three, 75 ohm resistors.
here is the link
http://www.overclockers.com/forums/s...d.php?t=666716