wrong screen resolution (640x480) with Nouveau driver

[fulvio]

I use ubuntu 18.04 on Toshiba notebook with Nvidia card.
When i use Nouveau Driver the screen resolution is set to very low value: 640 x 480 (4:3) and is not possible to change it.

If i use NVidia property driver the resolution is set correctly.

I attach files with the output of commands: lspci, uname -a, cpuinfo, lshw

Thanks !

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xserver-xorg-video-nouveau 1:1.0.15-2
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Uname: Linux 4.15.0-22-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] È una directory: '/proc/driver/nvidia/gpus/0000:01:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 340.106 Tue Jan 9 15:10:23 PST 2018
 GCC version: gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)
.proc.driver.nvidia.warnings.fbdev:
 Your system is not currently configured to drive a VGA console
 on the primary VGA device. The NVIDIA Linux graphics driver
 requires the use of a text-mode VGA console. Use of other console
 drivers including, but not limited to, vesafb, may result in
 corruption and stability problems, and is not supported.
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Tue May 29 21:11:49 2018
DistUpgraded: 2018-05-20 00:53:03,968 DEBUG icon theme changed, re-reading
DistroCodename: bionic
DistroVariant: ubuntu
DkmsStatus:
 nvidia-340, 340.106, 4.15.0-22-generic, x86_64: installed
 virtualbox, 5.2.10, 4.15.0-20-generic, x86_64: installed
 virtualbox, 5.2.10, 4.15.0-22-generic, x86_64: installed
GraphicsCard:
 NVIDIA Corporation GT218M [NVS 2100M] [10de:0a6a] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: Toshiba America Info Systems GT218M [NVS 2100M] [1179:0001]
MachineType: TOSHIBA TECRA S11
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-22-generic root=UUID=efdf25e3-36ae-4c91-a9f9-142e25478afe ro quiet splash vt.handoff=1
SourcePackage: xserver-xorg-video-nouveau
UpgradeStatus: Upgraded to bionic on 2018-05-19 (9 days ago)
dmi.bios.date: 10/23/2012
dmi.bios.vendor: TOSHIBA
dmi.bios.version: Version 3.50
dmi.board.asset.tag: 0000000000
dmi.board.name: Portable PC
dmi.board.vendor: TOSHIBA
dmi.board.version: Version A0
dmi.chassis.asset.tag: 0000000000
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: Version 1.0
dmi.modalias: dmi:bvnTOSHIBA:bvrVersion3.50:bd10/23/2012:svnTOSHIBA:pnTECRAS11:pvrPTSE3E-01N01CIT:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
dmi.product.family: 0000000000
dmi.product.name: TECRA S11
dmi.product.version: PTSE3E-01N01CIT
dmi.sys.vendor: TOSHIBA
version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
version.libdrm2: libdrm2 2.4.91-2
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2
xserver.bootTime: Tue May 29 21:01:04 2018
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.19.6-1ubuntu4