intel without connected monitor

[Eric Anholt]

On Tue, 2008-12-16 at 12:07 +0100, strawks wrote:
> Hi all,
> 
> I have a motherboard with an intel G45 chipset.
> When I try to launch an X server with no connected monitor it fails with
> (other outputs are ignored according to my xorg.conf) :
> 
> (II) intel(0): Output HDMI-2 using monitor section Sharp Aquos
> (**) intel(0): Option "PreferredMode" "1080p"
> (**) intel(0): Option "Enable" "true"
> (II) intel(0): I2C bus "HDMIDDC_C" initialized.
> (II) intel(0): HDMI output 2 detected
> (II) intel(0): EDID for output HDMI-2
> (II) intel(0): Output HDMI-2 enabled by config file
> (WW) intel(0): Unable to find initial modes
> (EE) intel(0): Output HDMI-2 enabled but has no modes
> (EE) intel(0): No valid modes.
> 
> I have read how to setup dual head at
> http://intellinuxgraphics.org/dualhead.html and my xorg.conf relevant
> sections look like this :
> Section "Device"
>         Identifier      "Intel GMA X4500HD"
>         Driver          "intel"
>         BusID           "PCI:0:2:0"
>         VendorName      "Intel"
>         BoardName       "G45 [Intel GMA X4500HD]"
>         Option          "AccelMethod"   "EXA"
>         Option          "ModeDebug"     "true"
> 
>         Option          "monitor-VGA"           "ignore"
>         Option          "monitor-HDMI-1"        "ignore"
>         Option          "monitor-HDMI-2"        "Sharp Aquos"
> EndSection
> 
> Section "Monitor"
>         Identifier      "ignore"
>         Option          "ignore"        "true"
> EndSection
> 
> Section "Monitor"
>         Identifier      "Sharp Aquos"
>         ModeLine        "1080p" 148.50 1920 2448 2492 2640 1080 1084 1089
> 1125 +hsync +vsync
>         VertRefresh     23-61
>         HorizSync       15-68
>         Option          "PreferredMode"     "1080p"
>         Option          "enable"            "true"
> EndSection
> 
> Is there a way to force the driver to use the 1080p mode even when no
> monitor are connected?
> 
> thanks in advance.

If you've ever successfully connected a monitor to your system and had X
come up, please ignore the messages about SDVO.  You almost surely have
HDMI outputs, not SDVO.

We'd need to see /var/log/Xorg.0.log with Option "ModeDebug" "TRUE" to
figure out what was going wrong with your Option "enable" "true".

-- 
Eric Anholt
eric at anholt.net                         eric.anholt at intel.com


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