activation nvidia driver disturbs plymouth

Binary package hint: plymouth

After clean install plymouth was working ok: small beautifull ubuntu logo during startup

However after installation of the official nvidia driver (needed because games where very slow) following problem
occurs:

- after entering on grub the screen becomes black with a cursor at the left top of the screen
- after some seconds some flikkering occurs
- then very shortly a big ubuntu logo appears
- and then we get the logon screen

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: plymouth 0.8.2-2ubuntu2
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic-pae 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic-pae i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Sat May 8 09:01:20 2010
DefaultPlymouth: /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: System manufacturer System Product Name
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic-pae root=UUID=b80b8efa-19f2-4c3b-b161-caa4fcce9aff ro quiet splash
ProcEnviron:
 LANG=nl_BE.utf8
 SHELL=/bin/bash
ProcFB: 0 VGA16 VGA
SourcePackage: plymouth
TextPlymouth: /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
dmi.bios.date: 11/27/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0105
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5LD2-X/GBL
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev x.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: ASUSTek Computer INC.
dmi.chassis.version: Rev 1.xx
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0105:bd11/27/2007:svnSystemmanufacturer:pnSystemProductName:pvrRev1.xx:rvnASUSTeKComputerINC.:rnP5LD2-X/GBL:rvrRevx.xx:cvnASUSTekComputerINC.:ct3:cvrRev1.xx:
dmi.product.name: System Product Name
dmi.product.version: Rev 1.xx
dmi.sys.vendor: System manufacturer