[143035.972047] system not responsing after resume from suspend

[tavasti]

Sometimes my after resume from suspend I get black screen, and keyboard doesn't work at all.
All I can do is power-off system.

This happens maybe 1/5 times I resume from suspend

ProblemType: KernelOops
Annotation: Your system might become unstable now and might need to be restarted.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: tavasti 2174 F.... xfce4-mixer-plu
                      tavasti 2212 F.... xfce4-volumed
 /dev/snd/seq: timidity 1935 F.... timidity
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf4700000 irq 16'
   Mixer name : 'Analog Devices AD1981'
   Components : 'HDA:11d41981,103c309f,00100200 HDA:14f12bfa,103c309f,00090000'
   Controls : 11
   Simple ctrls : 9
Date: Tue Oct 27 20:59:27 2009
DistroRelease: Ubuntu 9.10
Failure: oops
HibernationDevice: RESUME=UUID=799c0715-bd64-4ade-bd32-339929e2139c
MachineType: Hewlett-Packard HP Compaq nx9420 (RH439ET#AK8)
Package: linux-image-2.6.31-14-generic 2.6.31-14.48
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-14-generic root=UUID=c652f457-77f8-45b6-bf1d-88e58ea578b2 ro quiet splash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
RelatedPackageVersions:
 linux-backports-modules-2.6.31-14-generic N/A
 linux-firmware 1.24
SourcePackage: linux
Tags: kernel-oops
Title: [143035.972047] ------------[ cut here ]------------
Uname: Linux 2.6.31-14-generic i686
dmi.bios.date: 09/25/2006
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68YAF Ver. F.17
dmi.board.name: 309F
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 54.3B
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68YAFVer.F.17:bd09/25/2006:svnHewlett-Packard:pnHPCompaqnx9420(RH439ET#AK8):pvrF.17:rvnHewlett-Packard:rn309F:rvrKBCVersion54.3B:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP Compaq nx9420 (RH439ET#AK8)
dmi.product.version: F.17
dmi.sys.vendor: Hewlett-Packard