X server crash with system lock geforce gtx550ti 12.04 [closed]

Question

As the title says, I'm using 12.04, running an Nvidia Geforce Gtx 550ti. I have installed the nvidia-current package, complete with dependencies (I've also installed a few stock nvidia drivers, but just running the ubuntu package right now.)

I've installed Wine, and a few games and what happens is that I'll run the game on fairly low settings and it will run fine for a little while, but it will crash.

I'm using the OpenGL option they come with, rather than d3d9. d3d9 is installed on wine, however.

I really don't think wine, or the games are the problem because I crashed while I was using a java application too.

I ran memtest and it reported my memory as fine.

I can't provide a backtrace because I can't log into the box via ssh or a tty when it crashes; I also can't find anything useful in kern.log, Xorg.0.log, or syslog.

Heres m xorg.conf. Hopefully it's helpful, because I'm at a loss.

EDIT Almost as soon as I originally posted this, the system crashed. Immediately below I have included stuff from kern.log when the crash occured.

Jan 30 00:00:52 cosine kernel: [  690.682661] generic-usb 0003:046D:C408.0006: input,hidraw3: USB HID v1.10 Mouse [Logitech USB Trackball] on usb-0000:00:02.0-1.4/input0
Jan 30 00:00:57 cosine kernel: [  695.712938] nvidia 0000:04:00.0: PCI INT A -> Link[APC8] -> GSI 16 (level, low) -> IRQ 16
Jan 30 00:00:57 cosine kernel: [  695.712950] nvidia 0000:04:00.0: setting latency timer to 64
Jan 30 00:00:57 cosine kernel: [  695.712955] vgaarb: device changed decodes: PCI:0000:04:00.0,olddecodes=none,decodes=none:owns=io+mem
Jan 30 00:00:57 cosine kernel: [  695.713237] NVRM: loading NVIDIA UNIX x86 Kernel Module  295.40  Thu Apr  5 21:28:09 PDT 2012
Jan 30 00:22:57 cosine kernel: [ 2015.421104] SysRq : SAK
Jan 30 00:22:57 cosine kernel: [ 2015.421180] SAK: killed process 11202 (Xorg): task_session(p)==tty->session
Jan 30 00:22:57 cosine kernel: [ 2015.421435] SAK: killed process 11202 (Xorg): task_session(p)==tty->session
Jan 30 00:51:21 cosine kernel: [ 3719.470557] dbus-daemon[795]: segfault at 92b874 ip 00165c74 sp bfe8402c error 4 in dbus-daemon[130000+6a000]
Jan 30 00:51:21 cosine kernel: [ 3719.471159] zeitgeist-fts[11700]: segfault at 21188204 ip 0013669f sp bf8cd000 error 4 in libgobject-2.0.so.0.3200.3[110000+4d000]
Jan 30 00:51:21 cosine kernel: [ 3719.471677] dbus-daemon[11583]: segfault at aae58c ip 0058c474 sp bf932ecc error 4 in dbus-daemon[55c000+6a000]
Jan 30 00:51:21 cosine kernel: [ 3719.472646] nm-applet[11641]: segfault at 204d55c0 ip 00423853 sp bfa73b10 error 4 in libglib-2.0.so.0.3200.3[3dd000+f7000]
Jan 30 00:51:21 cosine kernel: [ 3719.476322] mate-settings-d[11601]: segfault at 817f4c8 ip 00683b63 sp bfcdbee0 error 4 in libglib-2.0.so.0.3200.3[63d000+f7000]
Jan 30 00:51:21 cosine kernel: [ 3719.476750] mate-panel[11626]: segfault at 1ba0018 ip 00600adf sp bf9033c0 error 4 in libglib-2.0.so.0.3200.3[5ba000+f7000]
Jan 30 00:51:21 cosine kernel: [ 3719.477964] mateconfd-2[11588]: segfault at 87bc5c4 ip 0070ab63 sp bfa5d560 error 4 in libglib-2.0.so.0.3200.3[6c4000+f7000]
Jan 30 00:51:21 cosine kernel: [ 3719.478764] mate-power-mana[11676]: segfault at 636e6579 ip 008b6a4a sp bf8aaa10 error 4 in libglib-2.0.so.0.3200.3[870000+f7000]
Jan 30 00:51:21 cosine kernel: [ 3719.502022] pluma[12140]: segfault at 51527336 ip 008b9a48 sp bfeef6f0 error 4 in libglib-2.0.so.0.3200.3[873000+f7000]
Jan 30 00:51:21 cosine kernel: [ 3719.524763] init: modemmanager main process (822) terminated with status 1
Jan 30 00:51:21 cosine kernel: [ 3719.524797] init: modemmanager main process ended, respawning

xorg.conf follows

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 295.40  (buildmeister@swio-display-x86-rhel47-04.nvidia.com)  Thu Apr  5 22:33:07 PDT 2012


Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
EndSection

Section "Files"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    HorizSync       28.0 - 33.0
    VertRefresh     43.0 - 72.0
    Option         "DPMS"
    EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    Option     "Coolbits" "4"
    EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Coolbits" "4"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection