GCP tutorial suggests using T4 GPU to save costs, but fails when using T4 GPU

Update: GCP tutorial suggests using T4 GPU to save costs, but fails when using T4 GPU (error below)

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Hi, I am following the tutorial Training an Obstacle Tower agent using Dopamine and the Google Cloud Platform

I am getting the following error - I believe the problem is (EE) NVIDIA(GPU-0): UseDisplayDevice "None" is not supported with GRID - but I’m not sure of the root cause.

I was trying to use the T4 GPU to save $$ - I will try again with the default GPU

after typing

sudo /usr/bin/X :0 &
export DISPLAY=:0

I get this error

X.Org X Server 1.19.2
Release Date: 2017-03-02
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.9.0-8-amd64 x86_64 Debian
Current Operating System: Linux tensorflow-1-vm 4.9.0-8-amd64 #1 SMP Debian 4.9.130-2 (2018-10-27) x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.9.0-8-amd64 root=UUID=995b3d50-0ab0-4faa-8296-ab743ab0fde7 ro net.ifnames=0 biosdevname=0 console=ttyS0,38400n8 elevator=noop scsi_mod.use_blk_mq=Y
Build Date: 03 November 2018  03:09:11AM
xorg-server 2:1.19.2-1+deb9u5 (https://www.debian.org/support) 
Current version of pixman: 0.34.0
	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.0.log", Time: Thu Feb 14 01:06:15 2019
(==) Using config file: "/etc/X11/xorg.conf"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
(EE) 
Fatal server error:
(EE) no screens found(EE) 

/var/log/Xorg.0.log

[   385.871] (II) Module "ramdac" already built-in
[   385.877] (**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
[   385.877] (==) NVIDIA(0): RGB weight 888
[   385.877] (==) NVIDIA(0): Default visual is TrueColor
[   385.877] (==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
[   385.877] (**) NVIDIA(0): Option "UseDisplayDevice" "None"
[   385.877] (**) NVIDIA(0): Enabling 2D acceleration
[   385.877] (**) NVIDIA(0): Option "UseDisplayDevice" set to "none"; enabling NoScanout
[   385.877] (**) NVIDIA(0):     mode
[   385.877] (II) Loading sub module "glxserver_nvidia"
[   385.877] (II) LoadModule: "glxserver_nvidia"
[   385.877] (II) Loading /usr/lib/xorg/modules/extensions/libglxserver_nvidia.so
[   385.882] (II) Module glxserver_nvidia: vendor="NVIDIA Corporation"
[   385.882]    compiled for 4.0.2, module version = 1.0.0
[   385.882]    Module class: X.Org Server Extension
[   385.882] (II) NVIDIA GLX Module  410.72  Wed Oct 17 20:11:21 CDT 2018
[   386.482] (EE) NVIDIA(GPU-0): UseDisplayDevice "None" is not supported with GRID
[   386.482] (EE) NVIDIA(GPU-0):     displayless
[   386.482] (EE) NVIDIA(GPU-0): Failed to select a display subsystem.
[   386.563] (EE) NVIDIA(0): Failing initialization of X screen 0
[   386.563] (II) UnloadModule: "nvidia"
[   386.563] (II) UnloadSubModule: "glxserver_nvidia"
[   386.563] (II) Unloading glxserver_nvidia
[   386.563] (II) UnloadSubModule: "wfb"
[   386.563] (II) UnloadSubModule: "fb"
[   386.563] (EE) Screen(s) found, but none have a usable configuration.
[   386.563] (EE)
Fatal server error:
[   386.563] (EE) no screens found(EE)
[   386.563] (EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org
 for help.
[   386.563] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[   386.563] (EE)
[   386.564] (EE) Server terminated with error (1). Closing log file.

[zhenghongzhi]

I find the solution and it works for me：

delete or comment(with “#”) ServerLayout and Screen section in /etc/X11/xorg.conf file

[juge2]

For me only removing Option "UseDisplayDevice" "none" in “Screen” Section does also the trick.