Nvidia 340

After installing NVIDIA driver, the screen brightness is freezed by 100%

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-45-generic 4.15.0-45.48
ProcVersionSignature: Ubuntu 4.15.0-45.48-generic 4.15.18
Uname: Linux 4.15.0-45-generic x86_64
NonfreeKernelModules: wl nvidia
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC0D0p: senne 2237 F...m pulseaudio
 /dev/snd/controlC0: senne 2237 F.... pulseaudio
CurrentDesktop: XFCE
Date: Thu Feb 28 23:00:25 2019
InstallationDate: Installed on 2018-12-24 (66 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: Apple Inc. MacBook5,1
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-45-generic root=UUID=8980397b-61c8-4011-a75c-9777552c623c ro quiet splash vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-45-generic N/A
 linux-backports-modules-4.15.0-45-generic N/A
 linux-firmware 1.173.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/27/09
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MB51.88Z.007D.B03.0904271443
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-F42D89C8
dmi.board.vendor: Apple Inc.
dmi.board.version: Proto
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F42D89C8
dmi.modalias: dmi:bvnAppleInc.:bvrMB51.88Z.007D.B03.0904271443:bd04/27/09:svnAppleInc.:pnMacBook5,1:pvr1.0:rvnAppleInc.:rnMac-F42D89C8:rvrProto:cvnAppleInc.:ct10:cvrMac-F42D89C8:
dmi.product.family: MacBook
dmi.product.name: MacBook5,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.