I am also getting the same kernel BUG message at shutdown.
$ uname -a
Linux venice.mumblefrotz.org 2.6.28-15-generic #52-Ubuntu SMP Wed Sep 9
10:48:52 UTC 2009 x86_64 GNU/Linux
Selected dmidecode output:
BIOS Information
Vendor: Phoenix Technologies, LTD
Version: 6.00 PG
Release Date: 01/03/2006
Base Board Information
Manufacturer: EPoX COMPUTER CO., LTD
Product Name: nForce4 DDR: 9NPA+ / 9NPA+Ultra / 9NPAJ / 9NPA Ultra
Series
Version: 1.x
Processor Information
Socket Designation: Socket 939
Type: Central Processor
Family: Athlon 64
Manufacturer: AMD
ID: 32 0F 02 00 FF FB 8B 17
Signature: Family 15, Model 35, Stepping 2
Version: AMD Athlon(tm) 64 X2 Dual Core Processor 4800+
~$ lspci
00:00.0 Memory controller: nVidia Corporation CK804 Memory Controller (rev a3)
00:01.0 ISA bridge: nVidia Corporation CK804 ISA Bridge (rev a3)
00:01.1 SMBus: nVidia Corporation CK804 SMBus (rev a2)
00:02.0 USB Controller: nVidia Corporation CK804 USB Controller (rev a2)
00:02.1 USB Controller: nVidia Corporation CK804 USB Controller (rev a3)
00:04.0 Multimedia audio controller: nVidia Corporation CK804 AC'97 Audio
Controller (rev a2)
00:06.0 IDE interface: nVidia Corporation CK804 IDE (rev a2)
00:07.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev a3)
00:08.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev a3)
00:09.0 PCI bridge: nVidia Corporation CK804 PCI Bridge (rev a2)
00:0a.0 Bridge: nVidia Corporation CK804 Ethernet Controller (rev a3)
00:0b.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
00:0c.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
00:0d.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
00:0e.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address
Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM
Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
Miscellaneous Control
01:05.0 Multimedia video controller: Internext Compression Inc iTVC16 (CX23416)
MPEG-2 Encoder (rev 01)
01:06.0 Multimedia audio controller: VIA Technologies Inc. ICE1712 [Envy24] PCI
Multi-Channel I/O Controller (rev 02)
01:09.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306 Fire II IEEE 1394
OHCI Link Layer Controller (rev 80)
05:00.0 VGA compatible controller: nVidia Corporation NV45 [GeForce 6800 GTO]
(rev a2)
BUG message:
[595010.484523] ------------[ cut here ]------------
[595010.484564] kernel BUG at /build/buildd/linux-2.6.28/arch/x86/mm/pat.c:298!
[595010.484600] invalid opcode: 0000 [#1] SMP
[595010.484696] last sysfs file: /sys/devices/pci0000:00/0000:00:06.0/host5/targ
et5:0:0/5:0:0:0/type
[595010.484732] Dumping ftrace buffer:
[595010.484766] (ftrace buffer empty)
[595010.484799] CPU 1
[595010.484863] Modules linked in: tun binfmt_misc cx8800 cx88xx videobuf_dvb
dvb_core bttv ir_common videobuf_dma_sg videobuf_core btcx_risc lirc_i2c
lirc_dev bridge stp bnep vmnet vmblock vmci vmmon input_polldev video output
nfsd auth_rp cgss exportfs nfs lockd nfs_acl sunrpc sbp2 lp snd_ice1712
snd_ice17xx_ak4xxx snd_intel8x0 snd_ak4xxx_adda snd_pcm_oss snd_mixer_oss
snd_cs8427 snd_ac97_codec tuner_simple tuner_types ac97_bus snd_i2c snd_pcm
wm8775 snd_mpu401_uart snd_seq_dummy snd_seq_oss cx25840 snd_seq_midi
snd_rawmidi snd_seq_midi_event tuner snd_seq snd_timer snd_seq_device ivtv
compat_ioctl32 i2c_algo_bit cx2341x ppdev snd snd_page_alloc v4l2_common
tveeprom nvidia(P) i2c_nforce2 k8temp quickcam soundcore pcspkr parport_pc
parport psmouse serio_raw videodev v4l1_compat ohci1394 ieee1394 forcedeth
floppy fbcon tileblit font bitblit softcursor
[595010.487667] Pid: 30584, comm: usplash Tainted: P
2.6.28-15-generic #52-Ubuntu
[595010.487702] RIP: 0010:[<ffffffff80239290>] [<ffffffff80239290>]
reserve_memtype+0x3f0/0x640
[595010.487774] RSP: 0018:ffff880047d0bd18 EFLAGS: 00010286
[595010.487808] RAX: 0000000010000000 RBX: 000ffffffffffff0 RCX:
ffff880047d0bd78
[595010.487846] RDX: ffffffffffffffff RSI: 000000000fff0000 RDI:
ffffffffffff0000
[595010.487884] RBP: ffff880047d0bd58 R08: 0000000000000000 R09:
ffff8800378641f8
[595010.487922] R10: ffff88000c1301f8 R11: 0000000000003206 R12:
ffffffffffff0000
[595010.487960] R13: ffffffffffff0000 R14: ffffffffffffffff R15:
ffff880047d0bd78
[595010.487998] FS: 00007faa975946f0(0000) GS:ffff88007f806980(0000)
knlGS:00000000f7294750
[595010.488036] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[595010.488072] CR2: 00007faa971394af CR3: 0000000006e3f000 CR4:
00000000000006a0
[595010.488110] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[595010.488112] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[595010.488112] Process usplash (pid: 30584, threadinfo ffff880047d0a000, task
ffff880072d48000)
[595010.488112] Stack:
[595010.488112] ffffe20000fb8388 000000000fff0000 ffff880006e3f7f8
000ffffffffffff0
[595010.488112] ffffffffffff0000 0000000010000000 000000000fff0000
ffff880037864218
[595010.488112] ffff880047d0bda8 ffffffff802396aa ffff8800378640a8
ffff880029429380
[595010.488112] Call Trace:
[595010.488112] [<ffffffff802396aa>] phys_mem_access_prot_allowed+0xba/0x170
[595010.488112] [<ffffffff8048ad07>] mmap_mem+0x87/0x150
[595010.488112] [<ffffffff802cb45d>] mmap_region+0x23d/0x630
[595010.488112] [<ffffffff802cbd24>] do_mmap_pgoff+0x3e4/0x410
[595010.488112] [<ffffffff802177d6>] sys_mmap+0x106/0x130
[595010.488112] [<ffffffff8021253a>] system_call_fastpath+0x16/0x1b
[595010.488112] Code: 00 49 89 d0 48 8b 55 c8 4c 89 ee 48 c7 c7 00 bc 7e 80 31
c0 45 31 e4 e8 5e 00 46 00 e9 68 fc ff ff 66 2e f 1f 84 00 00 00 00 00 <0f> 0b
eb fe 0f 1f 40 00 48 8b 7d d0 4c 89 fa 48 89 de e8 f9 f7
[595010.488112] RIP [<ffffffff80239290>] reserve_memtype+0x3f0/0x640
[595010.488112] RSP <ffff880047d0bd18>
[595010.491442] ---[ end trace 3f5a300f3827eeb7 ]---
--
kernel BUG at /build/buildd/linux-2.6.28/arch/x86/mm/pat.c:298!
https://bugs.launchpad.net/bugs/407652
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