Public bug reported:

sound driver stops working often

ProblemType: KernelOops
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-5-generic 2.6.38-5.32
Regression: Yes
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
Uname: Linux 2.6.38-5-generic i686
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Annotation: Your system might become unstable now and might need to be 
restarted.
Architecture: i386
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  shayne     1576 F.... xfce4-volumed
                      shayne     1592 F.... xfce4-mixer-plu
                      shayne     1697 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfebfc000 irq 47'
   Mixer name   : 'SigmaTel STAC9228'
   Components   : 'HDA:83847616,102801f3,00100201 
HDA:14f12c06,14f1000f,00100000'
   Controls      : 27
   Simple ctrls  : 18
Date: Tue Mar  8 12:11:47 2011
Failure: oops
Frequency: Once a day.
HibernationDevice: RESUME=UUID=01697498-bb9b-4618-ab61-246a7f3fa186
InstallationMedia: Xubuntu 11.04 "Natty Narwhal" - Alpha i386 (20101201.2)
MachineType: Dell Inc. Inspiron 1420
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-5-generic 
root=UUID=84391657-5afd-4523-af40-aac97838a151 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-5-generic N/A
 linux-backports-modules-2.6.38-5-generic  N/A
 linux-firmware                            1.48
SourcePackage: linux
Title: kernel BUG at /build/buildd/linux-2.6.38/fs/inode.c:1422!
UpgradeStatus: Upgraded to natty on 2011-01-20 (47 days ago)
dmi.bios.date: 07/11/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 0JX269
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: 
dmi:bvnDellInc.:bvrA09:bd07/11/2008:svnDellInc.:pnInspiron1420:pvr:rvnDellInc.:rn0JX269:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Inspiron 1420
dmi.sys.vendor: Dell Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-kerneloops i386 kernel-oops natty needs-upstream-testing 
regression-update

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https://bugs.launchpad.net/bugs/731542

Title:
  kernel BUG at /build/buildd/linux-2.6.38/fs/inode.c:1422!

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