WARNING: at /build/buildd/linux-2.6.38/drivers/gpu/drm/radeon/radeon_fence.c:248 radeon_fence_wait+0x36f/0x3e0 [radeon]()

Just updated my system after uninstalling all mysql and phpmyadmin programs including cherokee at 5:00pm Eastern time, Canada. The date of the update was April 11th by the way.
I rebooted Natty and after 30mins from the reboot and not having touched the computer, there was no signal according to my screen. After a reboot, everything's fine.

ProblemType: KernelOops
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic 2.6.38-8.42
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Annotation: Your system might become unstable now and might need to be restarted.
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: richard 1494 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'NVidia'/'HDA NVidia at 0xefff4000 irq 23'
   Mixer name : 'Realtek ALC1200'
   Components : 'HDA:10ec0888,103c2a64,00100101'
   Controls : 37
   Simple ctrls : 20
Card1.Amixer.info:
 Card hw:1 'Generic'/'HD-Audio Generic at 0xef9fc000 irq 45'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100200'
   Controls : 4
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Mon Apr 11 17:15:17 2011
Failure: oops
HibernationDevice: RESUME=UUID=0c4c1c5b-f048-425c-a600-5e4296381211
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta 1 amd64 (20110329.1)
Lsusb:
 Bus 002 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 004: ID 0718:060c Imation Corp.
 Bus 001 Device 003: ID 058f:6377 Alcor Micro Corp. Multimedia Card Reader
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Compaq-Presario FK592AA-A2L SR5648F
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=12baed81-c4be-440c-ab0a-f1cd1f0d9226 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-8-generic N/A
 linux-backports-modules-2.6.38-8-generic N/A
 linux-firmware 1.50
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
Title: WARNING: at /build/buildd/linux-2.6.38/drivers/gpu/drm/radeon/radeon_fence.c:248 radeon_fence_wait+0x36f/0x3e0 [radeon]()
UpgradeStatus: Upgraded to natty on 2011-04-11 (0 days ago)
dmi.bios.date: 07/29/2008
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 5.17
dmi.board.name: Napa
dmi.board.vendor: FOXCONN
dmi.board.version: HP P/N
dmi.chassis.type: 3
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr5.17:bd07/29/2008:svnCompaq-Presario:pnFK592AA-A2LSR5648F:pvr:rvnFOXCONN:rnNapa:rvrHPP/N:cvnHewlett-Packard:ct3:cvr:
dmi.product.name: FK592AA-A2L SR5648F
dmi.sys.vendor: Compaq-Presario