package qemu-kvm 0.12.3-0ubuntu6 failed to install/upgrade:

[prafull]

Binary package hint: qemu-kvm

while upgrade this erorr

ProblemType: Package
Architecture: i386
Date: Sat Mar 6 11:39:07 2010
DistroRelease: Ubuntu 10.04
ErrorMessage:
 ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha i386 (20091222.1)
KvmCmdLine: Error: command ['ps', '-C', 'kvm', '-F'] failed with exit code 1: UID PID PPID C SZ RSS PSR STIME TTY TIME CMD
MachineType: Acer, inc. TravelMate 4600
Package: qemu-kvm 0.12.3-0ubuntu6
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-15-generic root=UUID=e275d044-fa6e-418f-9304-273d6657606a ro quiet splash
ProcVersionSignature: Ubuntu 2.6.32-15.22-generic
SourcePackage: qemu-kvm
Title: package qemu-kvm 0.12.3-0ubuntu6 failed to install/upgrade:
Uname: Linux 2.6.32-15-generic i686
dmi.bios.date: 04/21/06
dmi.bios.vendor: Acer
dmi.bios.version: 3A45
dmi.board.name: Crane II
dmi.board.vendor: Acer, Inc.
dmi.board.version: Not Applicable
dmi.chassis.type: 1
dmi.chassis.vendor: , Inc.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAcer:bvr3A45:bd04/21/06:svnAcer,inc.:pnTravelMate4600:pvrNotApplicable:rvnAcer,Inc.:rnCraneII:rvrNotApplicable:cvn,Inc.:ct1:cvrN/A:
dmi.product.name: TravelMate 4600
dmi.product.version: Not Applicable
dmi.sys.vendor: Acer, inc.