problem with system freezes.

[Dandel]

I'm having problems where i keep having the complete system freeze when i am browsing the internet with firefox 3.0 ( i've checked, the issue is not flash, and gnash ) and having various videos playing using the xvideo extension.
System Spec:

• Athlon(tm) 64 X2 3800+
• Epox EP9NAJ+Ultra
• 1024mb memory
• PowerColor Radeon X1900GT video card.
• ubuntu 8.04

FGLRX 8.47.3 ( Catalyst 8.4, latest one renders system highly unusable. )

Xorg Config file:

# 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 "ServerLayout"
	Identifier     "Default Layout"
	Screen      0  "aticonfig-Screen[0]" 0 0
EndSection

Section "Files"
EndSection

Section "Module"
        Load  "bitmap"
        Load  "ddc"
        Load  "dri"
        Load  "extmod"
        Load  "freetype"
        Load  "glx"
        Load  "int10"
        Load  "type1"
        Load  "vbe"
EndSection

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

Section "InputDevice"
	Identifier  "Configured Mouse"
	Driver      "vmmouse"
EndSection

Section "Monitor"
	Identifier   "Configured Monitor"
EndSection

Section "Monitor"
	Identifier   "aticonfig-Monitor[0]"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
EndSection

Section "Device"
	Identifier  "Configured Video Device"
EndSection
#primary render device.
Section "Device"
	Identifier  "aticonfig-Device[0]"
	Driver      "fglrx"
	Option	    "XAANoOffscreenPixmaps" "on"
	Option	    "VideoOverlay" "on"
	Option	    "OpenGLOverlay" "off"
	Option	    "Textured2D" "on"
	Option      "TexturedVideo" "on"
	Option	    "TexturedXrender" "on"
	### Set to 1 - better , set to 2 for compability(wine),
	### and 0 for basic
	Option	    "UseFastTLS" "2"
	Option	    "BackingStore" "on"
	Option	    "EnableMonitor" "crt1,crt2"
	Option	    "OverlayOnCRTC2" "1"
	BusID       "PCI:5:0:0"
EndSection
# secondary display.
Section "Device"
	Identifier  "aticonfig-Device[1]"
	Driver      "fglrx"
	BusID       "PCI:5:0:0"
	Screen      1
EndSection


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

Section "Screen"
	Identifier "aticonfig-Screen[0]"
	Device     "aticonfig-Device[0]"
	Monitor    "aticonfig-Monitor[0]"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
	EndSubSection
EndSection

Section "Extensions"
	# disable composite extension ( Compiz )
        #Option      "Composite" "Disable"
EndSection

System log:

Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086586] BUG: soft lockup - CPU#0 stuck for 11s! [Xorg:26415]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086593] 
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086596] Pid: 26415, comm: Xorg Tainted: P        (2.6.24-18-generic #1)
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086599] EIP: 0060:[<f8d0d64e>] EFLAGS: 00203246 CPU: 0
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086693] EIP is at _ZN4Asic16WaitForBitsClear19ConditionSuccessfulEv+0x1e/0x70 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086696] EAX: 90010140 EBX: 007ffff9 ECX: 00000000 EDX: f8c80e40
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086698] ESI: 00000000 EDI: cf0add58 EBP: cf0add00 ESP: cf0adce8
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086700]  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086703] CR0: 80050033 CR2: a372b000 CR3: 1f946000 CR4: 00000690
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086705] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086707] DR6: ffff0ff0 DR7: 00000400
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086751]  [<f8d0c948>] _ZN4Asic9WaitUntil15WaitForCompleteEv+0x38/0xf0 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086870]  [<f8d10a1c>] _ZN6AsicR616ASICIdleInternalEN4Asic15idle_WaitMethodE+0xcc/0x1f0 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.086980]  [<c0125f20>] default_wake_function+0x0/0x10
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.087136]  [<f8cee706>] QSSubmitList+0x146/0x150 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.087227]  [<f8d0b1fc>] _ZN4Asic7PM4idleENS_15idle_WaitMethodE+0x4c/0x80 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.087320]  [unix_stream_recvmsg+0x25d/0x550] unix_stream_recvmsg+0x25d/0x550
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.087324]  [<c0125f20>] default_wake_function+0x0/0x10
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.087343]  [<f8d05895>] _ZN15QS_PRIVATE_CORE7PM4idleEN4Asic15idle_WaitMethodE+0x35/0x70 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.087459]  [<f8cf5571>] _ZN10QS_PRIVATE11synchronizeEv+0x31/0x40 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.087552]  [<f8cee727>] QSSynchronize+0x17/0x20 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.087642]  [<f8cf60b9>] _Z14uQSSynchronizej+0x19/0x20 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.087734]  [<f8cfd6ef>] _Z8uCWDDEQCjjjPvjS_+0x33f/0x11a0 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.087866]  [<f8cee044>] CMMQS_uCWDDEQC+0x34/0x40 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.087974]  [<f8cb4ea8>] firegl_cmmqs_CWDDE_32+0x238/0x340 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088085]  [sys_quotactl+0x526/0x680] sys_quotactl+0x526/0x680
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088091]  [<f8cb3e66>] firegl_cmmqs_CWDDE32+0x76/0x110 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088231]  [<f8cb3df0>] firegl_cmmqs_CWDDE32+0x0/0x110 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088307]  [<f8ca651e>] firegl_ioctl+0x19e/0x220 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088379]  [sys_quotactl+0x526/0x680] sys_quotactl+0x526/0x680
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088432]  [sys_quotactl+0x526/0x680] sys_quotactl+0x526/0x680
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088436]  [<f8c9b8ac>] ip_firegl_ioctl+0x1c/0x30 [fglrx]
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088507]  [sys_quotactl+0x526/0x680] sys_quotactl+0x526/0x680
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088523]  [do_ioctl+0x78/0x90] do_ioctl+0x78/0x90
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088551]  [vfs_ioctl+0x22e/0x2b0] vfs_ioctl+0x22e/0x2b0
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088582]  [sys_ioctl+0x56/0x70] sys_ioctl+0x56/0x70
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088605]  [sysenter_past_esp+0x6b/0xa9] sysenter_past_esp+0x6b/0xa9
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088615]  [sys_quotactl+0x526/0x680] sys_quotactl+0x526/0x680
Jun 11 11:38:32 dandelx86-desktop kernel: [41904.088693]  =======================

my specific question is how do i prevent this lockup because i can't get it to stop happening.