On some tx2 system, I encountered this error dialog saying “The system is running in low-graphics mode”.
And I found this error log in Xorg.0.log. It seems like there’s an error on a graphic output device.
...
[ 18.643] Module class: X.Org Server Extension
[ 18.643] (II) NVIDIA GLX Module 28.2.1 Release Build (integ_stage_rel) (buildbrain@mobile-u64-773) Thu May 17 00:15:24 PDT 2018
[ 18.643] (II) LoadModule: "nvidia"
[ 18.644] (II) Loading /usr/lib/xorg/modules/drivers/nvidia_drv.so
[ 18.644] (II) Module nvidia: vendor="NVIDIA Corporation"
[ 18.644] compiled for 4.0.2, module version = 1.0.0
[ 18.644] Module class: X.Org Video Driver
[ 18.644] (II) NVIDIA dlloader X Driver 28.2.1 Release Build (integ_stage_rel) (buildbrain@mobile-u64-773) Thu May 17 00:16:09 PDT 2018
[ 18.644] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[ 18.645] (WW) Falling back to old probe method for NVIDIA
[ 18.645] (II) Loading sub module "fb"
[ 18.645] (II) LoadModule: "fb"
[ 18.645] (II) Loading /usr/lib/xorg/modules/libfb.so
[ 18.645] (II) Module fb: vendor="X.Org Foundation"
[ 18.645] compiled for 1.18.4, module version = 1.0.0
[ 18.645] ABI class: X.Org ANSI C Emulation, version 0.4
[ 18.645] (II) Loading sub module "wfb"
[ 18.645] (II) LoadModule: "wfb"
[ 18.645] (II) Loading /usr/lib/xorg/modules/libwfb.so
[ 18.645] (II) Module wfb: vendor="X.Org Foundation"
[ 18.645] compiled for 1.18.4, module version = 1.0.0
[ 18.645] ABI class: X.Org ANSI C Emulation, version 0.4
[ 18.646] (II) Loading sub module "ramdac"
[ 18.646] (II) LoadModule: "ramdac"
[ 18.646] (II) Module "ramdac" already built-in
[ 18.646] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card support
[ 18.646] (**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
[ 18.646] (==) NVIDIA(0): RGB weight 888
[ 18.646] (==) NVIDIA(0): Default visual is TrueColor
[ 18.646] (==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
[ 18.646] (**) NVIDIA(0): Option "AllowEmptyInitialConfiguration" "true"
[ 18.647] (**) NVIDIA(0): Option "MetaModes" "800x480 +0+0"
[ 18.647] (**) NVIDIA(0): Enabling 2D acceleration
[ 18.647] (EE) NVIDIA(GPU-0): Failed to initialize the NVIDIA graphics device!
[ 18.647] (EE) NVIDIA(0): Failing initialization of X screen 0
[ 18.647] (II) UnloadModule: "nvidia"
[ 18.647] (II) UnloadSubModule: "wfb"
[ 18.647] (II) UnloadSubModule: "fb"
[ 18.647] (EE) Screen(s) found, but none have a usable configuration.
[ 18.647] (EE)
Fatal server error:
[ 18.647] (EE) no screens found(EE)
[ 18.647] (EE)
...
I use auvidea J120 and HDMI output. with this xorg.conf
Section "Module"
Disable "dri"
SubSection "extmod"
Option "omit xfree86-dga"
EndSubSection
EndSection
Section "Device"
Identifier "Tegra0"
Driver "nvidia"
# Allow X server to be started even if no display devices are connected.
Option "AllowEmptyInitialConfiguration" "true"
EndSection
Section "Monitor"
Identifier "Monitor0"
ModeLine "800x480" 29.40 800 816 878 982 480 482 488 528 -hsync +vsync
HorizSync 31.0 - 76.0
VertRefresh 56.0 - 76.0
EndSection
Section "Screen"
Identifier "Screen0"
Device "Tegra0"
Monitor "Monitor0"
DefaultDepth 24
Option "MetaModes" "800x480 +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Can somebody help me?