kernel out of memory

The my ubuntu 10.04 installation is upgraded from 9.10 release. There is not such problem in past 9.10 release.

The whole operation system may be hang up three or more times in one week, "hang up" means the responses of keyboard and mice would turn slowly and slowly, and lost all their responses finally, and I could hear disk is very busy at this time. I tried to disable some unused services first, for example, postfix, kernel-nfs-server and so on, unfortunately, "hang up" still occurs sometimes.

In the last "hang up", I try to wait more time to inspect what happens in system, I switched console interface after disk was turn to busy suddenly (in this time, keyboard and mice is almost hard to response), I saw some "out of memory" words in console.

BTW: I use Radeon HD 3200 Graphic , closed source driver "fglrx" driver, is it buggy? Anyway, I switched to open source driver now.

The attachment is kernel log of crashed boot.

Thanks!

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-22-generic 2.6.32-22.36
Regression: Yes
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic x86_64
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: li 3265 F.... pulseaudio
CRDA: Error: [Errno 2] 没有那个文件或目录
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xfe024000 irq 16'
   Mixer name : 'Realtek ALC883'
   Components : 'HDA:10ec0883,10ec0883,00100002'
   Controls : 36
   Simple ctrls : 19
CheckboxSubmission: 68e1add0404f5a81c3e55d802be11d80
CheckboxSystem: f528ccaae870082232fc3df6a6be695f
Date: Tue Jun 29 22:53:22 2010
Frequency: Once every few days.
HibernationDevice: RESUME=UUID=4b85761e-982c-4e7a-8182-4ae00f90422d
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.

 ppp0 no wireless extensions.
MachineType: Unknow Unknow
ProcCmdLine: BOOT_IMAGE=/vmusernamenuz-2.6.32-22-generic root=UUID=c07e5bb7-3bde-45a2-a6a2-228370b33b83 ro single splash vga=758
ProcEnviron:
 LANGUAGE=zh_CN:en_US:en
 LANG=zh_CN.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
RfKill:

SourcePackage: linux
dmi.bios.date: 05/19/2008
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
dmi.board.name: SY-A780+
dmi.board.vendor: soyo
dmi.board.version: VER:E1.3G
dmi.chassis.type: 3
dmi.chassis.vendor: Unknow
dmi.chassis.version: Unknow
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd05/19/2008:svnUnknow:pnUnknow:pvrUnknow:rvnsoyo:rnSY-A780+:rvrVERE1.3G:cvnUnknow:ct3:cvrUnknow:
dmi.product.name: Unknow
dmi.product.version: Unknow
dmi.sys.vendor: Unknow