OpenGL vendor: llvmpipe, instead of Nvidia GC

[Screamfox]

I have a issue when i try to install my GPU i followed step by step the tutorial --> https://forum.proxmox.com/threads/gpu-passthrough-tutorial-reference.34303/

but now i confronting a issue i have disabled disaplay is set to none and when i type

$ glxinfo|egrep "OpenGL vendor|OpenGL renderer"
OpenGL vendor string: VMware, Inc.
OpenGL renderer string: llvmpipe (LLVM 7.0, 256 bits)

and when i try to startX i get

$ startx


X.Org X Server 1.19.6
Release Date: 2017-12-20
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.4.0-138-generic x86_64 Ubuntu
Current Operating System: Linux pcod.alliancedigital.tv 4.15.0-46-generic #49-Ubuntu SMP Wed Feb 6 09:33:07 UTC 2019 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-46-generic root=UUID=6e7da372-43f2-44ec-a20d-7d4d27cce223 ro
Build Date: 25 October 2018  04:11:27PM
xorg-server 2:1.19.6-1ubuntu4.2 (For technical support please see http://www.ubuntu.com/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: Wed Mar 20 14:42:13 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)
(EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org
 for help.
(EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
(EE)
(EE) Server terminated with error (1). Closing log file.
xinit: giving up
xinit: unable to connect to X server: Connection refused
xinit: server error

but the driver is installed i don't understed whats is appening