Hi Wayne,
Thank you for your answer.
I have understood what happens exactly in my user case : the screen connected to the nvidia AGX jetson Xavier by the Rogue motherboard seems not give its EDID (it is a aeronautical screen which uses a hdmi converter - everything but standard :-) ). So the X server launchs its default “AllowInitialConfiguration”, but we dont have any signal on the hdmi output. That is not what we expect : we would like to have the same behavior with the X server, as if one standard screen (with a given EDID) were connected on the first video output HDMI-0. We get the same EDID binary file of the final screen, and we know the right LineMode to set (a standard 1080p 60 hz). But that does not work.
How to force the presency of this screen into the xorg.conf, even if nothing seems to be connected on the hdmi port ?
Here is my Xorg.0.log - end part :
.
[ 33.223] () NVIDIA(0): Option “DPI” “96 x 96”
[ 33.223] () NVIDIA(0): Option “ModeValidation” “NoXServerModes”
[ 33.223] () NVIDIA(0): Option “AllowEmptyInitialConfiguration” “false”
[ 33.223] () NVIDIA(0): Option “ForceFullCompositionPipeline” “on”
[ 33.223] () NVIDIA(0): Option “UseEDID” “true”
[ 33.223] () NVIDIA(0): Option “ConnectedMonitor” “DFP-0”
[ 33.223] () NVIDIA(0): Option “CustomEDID” “DFP-0:/etc/X11/MyEdid.bin”
[ 33.224] () NVIDIA(0): Enabling 2D acceleration
[ 33.224] (**) NVIDIA(0): ConnectedMonitor string: “DFP-0”
[ 33.224] (II) Loading sub module “glxserver_nvidia”
[ 33.224] (II) LoadModule: “glxserver_nvidia”
[ 33.224] (II) Loading /usr/lib/xorg/modules/extensions/libglxserver_nvidia.so
[ 33.233] (II) Module glxserver_nvidia: vendor=“NVIDIA Corporation”
[ 33.233] compiled for 4.0.2, module version = 1.0.0
[ 33.233] Module class: X.Org Server Extension
[ 33.233] (II) NVIDIA GLX Module 32.4.3 Release Build (integ_stage_rel) (buildbrain@mobile-u64-3357) Thu Jun 25 21:22:13 PDT 2020
[ 33.264] (–) NVIDIA(0): Valid display device(s) on GPU-0 at SoC
[ 33.264] (–) NVIDIA(0): DFP-0
[ 33.264] (–) NVIDIA(0): DFP-1
[ 33.265] (II) NVIDIA(0): NVIDIA GPU Xavier (nvgpu) (GV11B) at SoC (GPU-0)
[ 33.265] (–) NVIDIA(0): Memory: 32693372 kBytes
[ 33.265] (–) NVIDIA(0): VideoBIOS:
[ 33.265] (EE) NVIDIA(0): Failed to assign any connected display devices to X screen 0.
[ 33.265] (EE) NVIDIA(0): Set AllowEmptyInitialConfiguration if you want the server
[ 33.265] (EE) NVIDIA(0): to start anyway
[ 33.265] (EE) NVIDIA(0): Failing initialization of X screen 0
[ 33.265] (II) UnloadModule: “nvidia”
[ 33.265] (II) UnloadSubModule: “glxserver_nvidia”
[ 33.266] (II) Unloading glxserver_nvidia
[ 33.266] (II) UnloadSubModule: “wfb”
[ 33.266] (II) UnloadSubModule: “fb”
[ 33.266] (EE) Screen(s) found, but none have a usable configuration.
[ 33.266] (EE)
Fatal server error:
[ 33.266] (EE) no screens found(EE)
[ 33.266] (EE)
Note that these following options :
Option “ConnectedMonitor” “DFP-0”
Option “CustomEDID” “DFP-0:/etc/X11/MyEdid.bin”
seems to be totally ignored by the driver, because if the file MyEdid.bin is not existing : we have no warning nor error into the xorg log.
Is it implemented on the jetson xavier GPU driver ?
Here is our xorg.conf :
Section “ServerFlags”
Option “DontVTSwitch” “true”
Option “BlankTime” “0”
Option “StandbyTime” “0”
Option “SuspendTime” “0”
Option “OffTime” “0”
EndSection
Section “Module”
Disable “dri”
SubSection “extmod”
Option “omit xfree86-dga”
EndSubSection
Load “glx”
EndSection
Section “Device”
Identifier “Tegra0”
Driver “nvidia”
Option “AllowEmptyInitialConfiguration” “false”
Option “ModeValidation” “NoXServerModes”
Option “ConnectedMonitor” “DFP-0”
Option “CustomEDID” “DFP-0:/etc/X11/MyEdid.bin”
Option “UseEDID” “true”
Option “Monitor-DFP-0” “Monitor0”
EndSection
Section “Monitor”
Identifier “Monitor0”
HorizSync 29.0-71.0
VertRefresh 29.0-90.0
Option “DPMS” “false”
Option “DPI” “96 x 96”
ModeLine “1920x1080” 148.5 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync
EndSection
Section “Screen”
Identifier “ScreenDisplay”
Device “Tegra0”
Monitor “Monitor0”
DefaultColorDepth 24
SubSection “Display”
Depth 24
Modes “1920x1080”
EndSubSection
EndSection
Section “ServerLayout”
Identifier “PhotonavLayout”
Screen 0 “ScreenDisplay” 0 0
EndSection
Thank you a lot for your help.