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i'm experiencing random freezes.
the system freezes at seemingly random points and leaves me with only a cursor.
i can reboot through CTRL+ALT+SysRq REISUB, and it does close open programs properly, though unsaved data is lost.

it happened while 
-using firefox with 5 tabs open, but otherwise idle; 
-using Firefox, scrolling down a long webpage. the scrolling seemed to overflow and firefox greyed out, then system freeze;
-using LibreOffice, 1 document open, editing a textbox, specifically clicking away from the textbox.

i did play some youtube videos both full screen and in a tab, but didn't
notice performance issues. didn't invoke a freeze.

OS: ubuntu 12.04 64 bit
kernel: 3.2.0.24 generic
Gnome 3.4.1
Device: Acer 9300 laptop
RAM: 1.7 GiB
CPU: AMD Athlon(tm) 64 X2 Dual-Core Processor TK-53 × 2
Graphics card: NVIDIA GeForce Go 6100
Graphics driver: Nouveau

I'm on Nouveau because of the NVIDIA security patch debacle (bug 982485)

the system freezes at seemingly random points and leaves me with only a cursor.
i can reboot through CTRL+ALT+SysRq REISUB, and it does close open programs properly, though unsaved data is lost.

i am at a loss what commands to type to get more info but am willing to
help

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,snap,gnomecompat,place,move,dbus,mousepoll,compiztoolbox,clone,grid,imgpng,resize,vpswitch,wall,regex,session,unitymtgrabhandles,animation,fade,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Thu May  3 22:15:31 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GpuHangFrequency: Several times a day
GpuHangReproducibility: Seems to happen randomly
GpuHangStarted: Immediately after installing this version of Ubuntu
GraphicsCard:
 NVIDIA Corporation C51 [GeForce Go 6100] [10de:0247] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] Device [1025:0112]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 002: ID 0a81:0205 Chesen Electronics Corp. PS/2 Keyboard+Mouse Adapter
MachineType: Acer Aspire 9300
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=b477abfb-191f-4f20-b02a-0686e36f2481 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/15/2007
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.19
dmi.board.name: Myallm
dmi.board.vendor: Acer
dmi.board.version: Rev
dmi.chassis.asset.tag: None
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.19:bd05/15/2007:svnAcer:pnAspire9300:pvr0100:rvnAcer:rnMyallm:rvrRev:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 9300
dmi.product.version: 0100
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.7.6-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

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

** Affects: xserver-xorg-video-intel
     Importance: Undecided
         Status: New

** Affects: xserver-xorg-video-nouveau (Ubuntu)
     Importance: Medium
         Status: Confirmed


** Tags: amd64 apport-bug compiz-0.9 freeze precise regression-update ubuntu
-- 
10de:0247 [Acer Aspire 9300] Xorg freeze with Nouveau
https://bugs.launchpad.net/bugs/994203
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