WARNING: at /build/buildd/linux-2.6.31/net/mac80211/agg-tx.c:145 ___ieee80211_stop_tx_ba_session+0x89/0xa0 [mac80211]()

at startup popuped an error message about a kernel error

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: ALC269 Analog [ALC269 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: camoes 1926 F.... pulseaudio
CRDA: Error: [Errno 2] Ficheiro ou directoria inexistente
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf7eb8000 irq 16'
   Mixer name : 'Realtek ALC269'
   Components : 'HDA:10ec0269,1043831a,00100004'
   Controls : 12
   Simple ctrls : 7
Date: Tue Oct 27 18:03:47 2009
DistroRelease: Ubuntu 9.10
Failure: oops
HibernationDevice: RESUME=UUID=c7957dc0-1212-447a-b79f-0d9e5197b317
MachineType: ASUSTeK Computer INC. 1000H
Package: linux-image-2.6.31-14-generic 2.6.31-14.48
ProcCmdLine: root=UUID=796b326b-f0f4-4883-af42-85139446ca96 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: WARNING: at /build/buildd/linux-2.6.31/net/mac80211/agg-tx.c:145 ___ieee80211_stop_tx_ba_session+0x89/0xa0 [mac80211]()
Uname: Linux 2.6.31-14-generic i686
WpaSupplicantLog:

dmi.bios.date: 02/04/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1501
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1000H
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTek Computer INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1501:bd02/04/2009:svnASUSTeKComputerINC.:pn1000H:pvrx.x:rvnASUSTeKComputerINC.:rn1000H:rvrx.xx:cvnASUSTekComputerINC.:ct10:cvrx.x:
dmi.product.name: 1000H
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.