Crashing after install

[Colin Thompson]

My hardware..

AMD64 3000 2Gb RAM

Nforce 3 Motherboard (GA-K8NS Ultra-939)

I have installed Ubuntu Breezy (the 386 version) and all went well, I 
can use everything fine when I go to the desktop straight from finishing 
the installer.

The problem I have is after my first reboot, I can no longer log in, 
either from gdm or from a terminal.

Checking the syslog I find :-

Feb 2 11:32:17 localhost /usr/sbin/cron[6869]: (CRON) INFO (Running 
@reboot jobs)
Feb 2 11:32:19 localhost kernel: [ 92.602039] eth0: no IPv6 routers present
Feb 2 11:32:25 localhost kernel: [ 172.565720] ------------[ cut here 
]------------
Feb 2 11:32:25 localhost kernel: [ 172.570071] kernel BUG at :49795!
Feb 2 11:32:25 localhost kernel: [ 172.574546] invalid operand: 0000 [#1]
Feb 2 11:32:25 localhost kernel: [ 172.578942] Modules linked in: rfcomm 
l2cap bluetooth powernow_k8 cpufreq_userspace cpufreq_stats freq_table 
cpufreq_powersave cpufreq_ondemand cpufreq_conservative apm ipv6 
af_packet analog gameport floppy pcspkr rtc pci_hotplug snd_intel8x0 
snd_ac97_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore 
snd_page_alloc i2c_nforce2 i2c_core amd64_agp agpgart dm_mod tsdev evdev 
psmouse mousedev parport_pc lp parport md ext3 jbd processor skge 
forcedeth ehci_hcd ohci_hcd usbcore ide_cd cdrom ide_disk ide_generic 
sata_nv libata scsi_mod amd74xx ide_core unix vesafb capability 
commoncap vga16fb vgastate softcursor cfbimgblt cfbfillrect cfbcopyarea 
fbcon tileblit font bitblit
Feb 2 11:32:25 localhost kernel: [ 172.624610] CPU: 0
Feb 2 11:32:25 localhost kernel: [ 172.624612] EIP: 
0060:[kmem_freepages+57/136] Not tainted VLI
Feb 2 11:32:25 localhost kernel: [ 172.624614] EFLAGS: 00010246 
(2.6.12-9-386)
Feb 2 11:32:25 localhost kernel: [ 172.639079] EIP is at 
kmem_freepages+0x39/0x88
Feb 2 11:32:25 localhost kernel: [ 172.644010] eax: 00000000 ebx: 
00000001 ecx: 00000000 edx: c16e1f00
Feb 2 11:32:25 localhost kernel: [ 172.649076] esi: dfffff80 edi: 
f70f8f01 ebp: 00000001 esp: dfa07f1c
Feb 2 11:32:25 localhost kernel: [ 172.654349] ds: 007b es: 007b ss: 0068
Feb 2 11:32:25 localhost kernel: [ 172.659739] Process events/0 (pid: 3, 
threadinfo=dfa06000 task=dfb35020)
Feb 2 11:32:25 localhost kernel: [ 172.659908] Stack: dfffff80 f70ec740 
f70f8f01 c01341d2 dfffff80 f70f8f01 dfffff80 dffffff0
Feb 2 11:32:25 localhost kernel: [ 172.671298] 00000005 dfffb640 
c0135070 dfffff80 f70ec740 c03715e0 c03715e4 00000297
Feb 2 11:32:25 localhost kernel: [ 172.683074] 00000000 c01214c8 
00000000 c0134f98 ffffffff ffffffff 00000001 00000000
Feb 2 11:32:25 localhost kernel: [ 172.695537] Call Trace:
Feb 2 11:32:25 localhost kernel: [ 172.707760] [slab_destroy+88/121] 
slab_destroy+0x58/0x79
Feb 2 11:32:25 localhost kernel: [ 172.713972] [cache_reap+216/269] 
cache_reap+0xd8/0x10d
Feb 2 11:32:25 localhost kernel: [ 172.720110] [worker_thread+343/443] 
worker_thread+0x157/0x1bb
Feb 2 11:32:25 localhost kernel: [ 172.726124] [cache_reap+0/269] 
cache_reap+0x0/0x10d
Feb 2 11:32:25 localhost kernel: [ 172.732103] 
[default_wake_function+0/18] default_wake_function+0x0/0x12
Feb 2 11:32:25 localhost kernel: [ 172.738126] [schedule+1086/1188] 
schedule+0x43e/0x4a4
Feb 2 11:32:25 localhost kernel: [ 172.744022] 
[default_wake_function+0/18] default_wake_function+0x0/0x12
Feb 2 11:32:25 localhost kernel: [ 172.749923] [worker_thread+0/443] 
worker_thread+0x0/0x1bb
Feb 2 11:32:25 localhost kernel: [ 172.755711] [kthread+109/151] 
kthread+0x6d/0x97
Feb 2 11:32:25 localhost kernel: [ 172.761534] [kthread+0/151] 
kthread+0x0/0x97
Feb 2 11:32:25 localhost kernel: [ 172.767297] 
[kernel_thread_helper+5/11] kernel_thread_helper+0x5/0xb
Feb 2 11:32:25 localhost kernel: [ 172.773033] Code: 24 10 8d 97 00 00 
00 40 8b 4e 44 c1 ea 0c d3 e3 c1 e2 05 8d 4b ff 03 15 30 6b 37 c0 83 f9 
ff 74 12 0f ba 32 07 19 c0 85 c0 75 02 <0f> 0b 83 c2 20 49 eb e9 89 d8 
f7 d8 50 6a 14 e8 df e3 ff ff 58
Feb 2 11:32:31 localhost kernel: [ 172.795224] pdflush: bogus wakeup!
Feb 2 11:32:31 localhost kernel: [ 179.006884] pdflush: bogus wakeup!
Feb 2 11:32:31 localhost kernel: [ 179.013119] pdflush: bogus wakeup!
Feb 2 11:32:31 localhost kernel: [ 179.019239] pdflush: bogus wakeup!
Feb 2 11:32:31 localhost kernel: [ 179.025298] pdflush: bogus wakeup!
Feb 2 11:32:31 localhost kernel: [ 179.031178] pdflush: bogus wakeup!
Feb 2 11:32:31 localhost kernel: [ 179.036769] pdflush: bogus wakeup!

Booting recovery works ok, Using the liveCD works ok.

I have tried booting with various combinations of noapic nolapic etc, 
also I have tried installing, updating and then restarting with the 
newer kernel, but still the same problem.

Does anyone have any ideas what is causing my problem? And what is the 
pdflush thing? I have tried googling for that but can't find anything 
that makes sense to my linux newbie brain :)

Please help, I feel I'm so close to having things work.