This problem has me baffled, so let me start with the description, and then give you other info you'll need, and if anyone can come up with a starting point, that would be great.

Every once in a while, under varying loads and connection states (but always while being used, at the least playing some media) my Dell Latitude D800 will seize up (stop responding to input of any kind, sound will skip) and afterwards, the trackpad will no longer allow scrolling by sliding my finger on the side of the trackpad. The only way I've found to fix it is restarting.

There! It just happened again. I don't have scrolling ability anymore until I restart.

Here is relevant stuff. Let me know what else I can give you:
Dell Latitude D800, Ubuntu 8.04 Hardy Heron, 2.6.24-19-generic kernel

Output of cat /proc/bus/input/devices:
Code:
I: Bus=0017 Vendor=0001 Product=0001 Version=0100
N: Name="Macintosh mouse button emulation"
P: Phys=
S: Sysfs=/devices/virtual/input/input0
U: Uniq=
H: Handlers=mouse0 event0 
B: EV=7
B: KEY=70000 0 0 0 0 0 0 0 0
B: REL=3

I: Bus=0011 Vendor=0001 Product=0001 Version=ab41
N: Name="AT Translated Set 2 keyboard"
P: Phys=isa0060/serio0/input0
S: Sysfs=/devices/platform/i8042/serio0/input/input1
U: Uniq=
H: Handlers=kbd event1 
B: EV=120013
B: KEY=100f 2002000 380307a f800d001 feffffdf ffefffff ffffffff ffffffff
B: MSC=10
B: LED=7

I: Bus=0019 Vendor=0000 Product=0005 Version=0000
N: Name="Lid Switch"
P: Phys=PNP0C0D/button/input0
S: Sysfs=/devices/virtual/input/input2
U: Uniq=
H: Handlers=event2 
B: EV=21
B: SW=1

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button (CM)"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/virtual/input/input3
U: Uniq=
H: Handlers=kbd event3 
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0019 Vendor=0000 Product=0003 Version=0000
N: Name="Sleep Button (CM)"
P: Phys=PNP0C0E/button/input0
S: Sysfs=/devices/virtual/input/input4
U: Uniq=
H: Handlers=kbd event4 
B: EV=3
B: KEY=4000 0 0 0 0

I: Bus=0010 Vendor=001f Product=0001 Version=0100
N: Name="PC Speaker"
P: Phys=isa0061/input0
S: Sysfs=/devices/platform/pcspkr/input/input5
U: Uniq=
H: Handlers=kbd event5 
B: EV=40001
B: SND=6

I: Bus=0019 Vendor=0000 Product=0006 Version=0000
N: Name="Video Bus"
P: Phys=LNXVIDEO/video/input0
S: Sysfs=/devices/LNXSYSTM:00/device:00/PNP0A03:00/device:1e/LNXVIDEO:00/input/input6
U: Uniq=
H: Handlers=kbd event6 
B: EV=3
B: KEY=3f000b 0 0 0 0 0 0 0

I: Bus=0019 Vendor=1028 Product=0000 Version=0000
N: Name="b43-phy0"
P: Phys=
S: Sysfs=/devices/virtual/input/input9
U: Uniq=
H: Handlers=kbd event9 rfkill 
B: EV=3
B: KEY=4000 0 0 0 0 0 0 0

I: Bus=0011 Vendor=0002 Product=0008 Version=0000
N: Name="PS/2 Mouse"
P: Phys=isa0060/serio1/input1
S: Sysfs=/devices/virtual/input/input10
U: Uniq=
H: Handlers=mouse1 event7 
B: EV=7
B: KEY=70000 0 0 0 0 0 0 0 0
B: REL=3

I: Bus=0011 Vendor=0002 Product=0008 Version=6337
N: Name="AlpsPS/2 ALPS GlidePoint"
P: Phys=isa0060/serio1/input0
S: Sysfs=/devices/platform/i8042/serio1/input/input11
U: Uniq=
H: Handlers=mouse2 event8 
B: EV=f
B: KEY=420 0 70000 0 0 0 0 0 0 0 0
B: REL=3
B: ABS=1000003
tail of syslog at about the time it happens:
Jun 21 20:51:35 Sokaris kernel: [ 7576.580441] sr0: Hmm, seems the drive doesn't support multisession CD's
Jun 21 20:51:37 Sokaris kernel: [ 2525.269291] psmouse.c: GlidePoint at isa0060/serio1/input0 lost synchronization, throwing 3 bytes away.
Jun 21 20:51:38 Sokaris kernel: [ 7584.611452] psmouse.c: resync failed, issuing reconnect request
Jun 21 20:51:39 Sokaris NetworkManager: <debug> [1214095899.427556] nm_hal_device_removed(): Device removed (hal udi is '/org/freedesktop/Hal/devices/computer_logicaldev_input_4').
Jun 21 20:51:39 Sokaris NetworkManager: <debug> [1214095899.456114] nm_hal_device_removed(): Device removed (hal udi is '/org/freedesktop/Hal/devices/platform_i8042_i8042_AUX_port_logicaldev_input').
Jun 21 20:51:40 Sokaris kernel: [ 7584.839826] input: PS/2 Mouse as /devices/virtual/input/input12
Jun 21 20:51:40 Sokaris kernel: [ 7584.888190] input: AlpsPS/2 ALPS GlidePoint as /devices/platform/i8042/serio1/input/input13
Jun 21 20:51:40 Sokaris NetworkManager: <debug> [1214095900.268519] nm_hal_device_added(): New device added (hal udi is '/org/freedesktop/Hal/devices/computer_logicaldev_input_4').
Jun 21 20:51:40 Sokaris NetworkManager: <debug> [1214095900.291283] nm_hal_device_added(): New device added (hal udi is '/org/freedesktop/Hal/devices/platform_i8042_i8042_AUX_port_logicaldev_input').
complete dmesg:
http://paste.ubuntu.com/22000/

xorg.conf
Code:
# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc105"
	Option		"XkbLayout"	"us"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
EndSection

Section "InputDevice"
	Identifier	"Synaptics Touchpad"
	Driver		"synaptics"
	Option		"SendCoreEvents"	"true"
	Option		"Device"	"/dev/psaux"
	Option		"Protocol"	"auto-dev"
	Option		"HorizEdgeScroll"	"0"
EndSection

Section "Device"
	Identifier	"Configured Video Device"
	Driver		"nvidia"
	Option		"NoLogo"	"True"
EndSection

Section "Monitor"
	Identifier	"Configured Monitor"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Monitor		"Configured Monitor"
	Device		"Configured Video Device"
	Defaultdepth	24
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
  screen "Default Screen"
	Inputdevice	"Synaptics Touchpad"
EndSection
Section "Module"
	Load		"glx"
EndSection

If you need anything else, just ask and I'll post it. I have no idea what to do here. I guess the trackpad is "resetting itself"?

Thanks for any direction you can provide.