headless 3D

[Alex Deucher]

On Fri, Sep 24, 2010 at 11:38 PM, Ata Roboubi <ata at earthdetails.com> wrote:
> I am using an AGP ATI Radeon 9200 SE card (i believe with the fglrx
> driver) on AMD64 linux to render 3D on a headless server. I then
> gl_readpixels() and use the result without it ever being looked at on
> the interactive display.
>
> On xserver-xorg 7.0.0-0ubu (ubuntu 6.04), I made the following changes
> to my xorg.conf to make it not harp about the missing monitor:
> ---------------------------
> 1.under Section "Screen", all SubSection "Display" removed any
> explicit references to resolution other than my desired 1280x1024
>
> 2.added:
>    Section "Monitor"
>      Identifier     "Headless"
>      HorizSync       80.0 - 80.0
>      VertRefresh     75.0
>      Option         "DPMS"
>    EndSection
>
> 3.under Section "Screen", changed
>    Monitor        "Headless"
> --------------------------
> This worked very well.
>
> I recently upgraded to 7.5+5ubu (ubuntu 10.04). The above seized to
> work. I have tried the standard and fglrx driver and both refuse to
> work without a monitor.

In the monitor section add:
Option "Enable" "true"
See this page for more on configuring X using randr 1.2+:
http://wiki.debian.org/XStrikeForce/HowToRandR12

Alex


>
> --------------------------
> X.Org X Server 1.7.6
> Release Date: 2010-03-17
> X Protocol Version 11, Revision 0
> Build Operating System: Linux 2.6.24-27-server x86_64 Ubuntu
> Current Operating System: Linux test 2.6.32-24-server #43-Ubuntu SMP
> Thu Sep 16 16:05:42 UTC 2010 x86_64
> Kernel command line: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-server
> root=UUID=e5ee83ed-44f7-4a30-a8a8-552fe2a893a3 ro quiet
> Build Date: 21 July 2010  01:03:39PM
> xorg-server 2:1.7.6-2ubuntu7.3 (For technical support please see
> http://www.ubuntu.com/support)
> Current version of pixman: 0.16.4
>        Before reporting problems, check http://wiki.x.org
>        to make sure that you have the latest version.
> Markers: (--) probed, (**) from config file, (==) default setting,
>        (++) from command line, (!!) notice, (II) informational,
>        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
> (==) Log file: "/var/log/Xorg.1.log", Time: Fri Sep 24 19:58:07 2010
> (==) Using config file: "/etc/X11/xorg.conf"
> (==) Using config directory: "/usr/lib/X11/xorg.conf.d"
> (II) [KMS] Kernel modesetting enabled.
> (EE) RADEON(0): No modes.
> (EE) Screen(s) found, but none have a usable configuration.
>
> Fatal server error:
> no screens found
>
> Please consult the The X.Org Foundation support
>         at http://wiki.x.org
>  for help.
> Please also check the log file at "/var/log/Xorg.1.log" for additional
> information.
>
>  ddxSigGiveUp: Closing log
> giving up.
> xinit:  No such file or directory (errno 2):  unable to connect to X server
> xinit:  No such process (errno 3):  Server error.
> ---------------------------
>
> I tinkered with
>
>        Option     "NoDDC"                      "True"
>        Option     "IgnoreEDID"                 "True"
>        Option     "ReverseDDC"                 "False"
>        Option     "LVDSProbePLL"               "False"
>
> in  Section "Device" and various combinations of them on/off to no
> avail, as well as
>
>      Modeline "1280x1024_75.00"  138.54  1280 1368 1504 1728  1024
> 1025 1028 1069  -HSync +Vsync
>
> in Section "Monitor" produced by a very standard:
>
> gtf 1280 1024 75
>
> With a monitor, the standard driver works great! I just want to be
> able to take the monitor off and it does the same. There _must_ be a
> way to tell this system to stop caring! To have a monitor sit in a
> farm cage, for no other reason than to report DDC info to the card,
> when no one will ever look at this monitor, is philosophically
> pathetic.
>
> Please help!!!!
>
> --
> Ata Roboubi
> Co-Founder
> EarthDetails Inc.
> email: ata at earthdetails.com
> http://www.earthdetails.com/
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