I've got the same errors on my Asus L5800C laptop. Even worse: i've had
no problems running breezy and dapper but I am since recently
experiencing random hangups in Edgy.

This results in the keyboards (1 onboard, 1 ps/2 through usb) not
responding (mouse and touchpad still do). Then either no program in
gnome starts anymore or when I can make it reboot it hangs on errors
from the bcm43xx Broadcom wifi driver. I have to do a hard reset and
then at boot when I have to enter my boot password set in the bios only
the laptop keyboard works, the external one does not until linux boots.

Just did a completely clean install of Edgy yesterday and this still
seems to occur. Sometimes nothing happens for two days straight and
sometimes it hangs three times in one day.

I hope these data will help:

$ uname -a
Linux toMeloos 2.6.17-10-generic #2 SMP Tue Dec 5 22:28:26 UTC 2006 i686 
GNU/Linux

$ uptime
10:29:13 up  9:11,  2 users,  load average: 0.14, 0.10, 0.09
$ dmesg |grep "APIC error on CPU0:" | wc --lines
56

=> please note that during this uptime it was idle for all but about one
hour.

$ lspci
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 645xx (rev 03)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] Virtual PCI-to-PCI bridge 
(AGP)
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS963 [MuTIOL Media IO] 
(rev 14)
00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2 SMBus Controller
00:02.3 FireWire (IEEE 1394): Silicon Integrated Systems [SiS] FireWire 
Controller
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE]
00:02.6 Modem: Silicon Integrated Systems [SiS] AC'97 Modem Controller (rev a0)
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] AC'97 
Sound Controller (rev a0)
00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller 
(rev 0f)
00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller 
(rev 0f)
00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller 
(rev 0f)
00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller
00:0a.0 CardBus bridge: ENE Technology Inc CB-720/2/4 Cardbus Controller (rev 
01)
00:0a.1 CardBus bridge: ENE Technology Inc CB-720/2/4 Cardbus Controller (rev 
01)
00:0a.2 FLASH memory: ENE Technology Inc CB710 Memory Card Reader Controller
00:0c.0 Network controller: Broadcom Corporation BCM4303 802.11b Wireless LAN 
Controller (rev 02)
00:0d.0 Ethernet controller: 3Com Corporation 3c940 10/100/1000Base-T [Marvell] 
(rev 12)
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R250 Lf [FireGL 
9000] (rev 01)
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. 
RTL-8139/8139C/8139C+ (rev 10)

$ lsmod
Module                  Size  Used by
binfmt_misc            13448  1 
rfcomm                 42260  2 
l2cap                  27136  5 rfcomm
nfs                   250316  1 
lockd                  67976  2 nfs
sunrpc                165948  3 nfs,lockd
ipv6                  272288  12 
radeon                118816  2 
drm                    74644  3 radeon
speedstep_lib           5764  0 
cpufreq_userspace       5408  0 
cpufreq_stats           7744  0 
freq_table              6048  1 cpufreq_stats
cpufreq_powersave       2944  0 
cpufreq_ondemand        8876  0 
cpufreq_conservative     8712  0 
video                  17540  0 
tc1100_wmi              8324  0 
sbs                    16804  0 
sony_acpi               6412  0 
pcc_acpi               14080  0 
i2c_ec                  6272  1 sbs
hotkey                 11556  0 
dev_acpi               12292  0 
button                  7952  0 
battery                11652  0 
container               5632  0 
ac                      6788  0 
asus_acpi              17688  0 
af_packet              24584  2 
fuse                   43912  0 
sbp2                   24584  0 
scsi_mod              144648  1 sbp2
lp                     12964  0 
8139cp                 24832  0 
8139too                29056  0 
mii                     6912  2 8139cp,8139too
joydev                 11200  0 
tsdev                   9152  0 
hci_usb                18068  1 
bluetooth              53476  7 rfcomm,l2cap,hci_usb
usbhid                 45152  0 
snd_intel8x0           34844  1 
snd_ac97_codec         97696  1 snd_intel8x0
snd_ac97_bus            3456  1 snd_ac97_codec
usblp                  15488  0 
bcm43xx               127252  0 
snd_pcm_oss            47360  0 
snd_mixer_oss          19584  1 snd_pcm_oss
pcmcia                 40380  0 
irtty_sir              10112  0 
sir_dev                18308  1 irtty_sir
irda                  214332  2 irtty_sir,sir_dev
evdev                  11392  3 
crc_ccitt               3200  1 irda
ieee80211softmac       33792  1 bcm43xx
ieee80211              35272  2 bcm43xx,ieee80211softmac
ieee80211_crypt         7552  1 ieee80211
serio_raw               8452  0 
snd_pcm                84612  3 snd_intel8x0,snd_ac97_codec,snd_pcm_oss
snd_timer              25348  1 snd_pcm
psmouse                41352  0 
skge                   40336  0 
yenta_socket           28812  3 
rsrc_nonstatic         15360  1 yenta_socket
shpchp                 42144  0 
pci_hotplug            32828  1 shpchp
sis_agp                 9860  1 
agpgart                34888  2 drm,sis_agp
pcspkr                  4352  0 
pcmcia_core            43924  3 pcmcia,yenta_socket,rsrc_nonstatic
floppy                 63044  0 
parport_pc             37796  1 
parport                39496  2 lp,parport_pc
i2c_sis96x              6660  0 
snd                    58372  8 
snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
soundcore              11232  1 snd
i2c_core               23424  2 i2c_ec,i2c_sis96x
snd_page_alloc         11400  2 snd_intel8x0,snd_pcm
ext3                  142728  1 
jbd                    62228  1 ext3
ohci1394               37040  0 
ieee1394              306104  2 sbp2,ohci1394
ehci_hcd               34696  0 
ohci_hcd               22532  0 
usbcore               134912  6 hci_usb,usbhid,usblp,ehci_hcd,ohci_hcd
ide_generic             2432  0 
ide_disk               18560  3 
ide_cd                 33696  0 
cdrom                  38944  1 ide_cd
sis5513                15368  1 
generic                 6276  0 
thermal                15624  0 
processor              31560  1 thermal
fan                     6020  0 
fbcon                  41504  0 
tileblit                3840  1 fbcon
font                    9344  1 fbcon
bitblit                 7168  1 fbcon
softcursor              3328  1 bitblit
vesafb                  9244  0 
capability              5896  0 
commoncap               8704  1 capability

$ cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 2
model name      : Intel(R) Pentium(R) 4 CPU 2.80GHz
stepping        : 7
cpu MHz         : 2800.633
cache size      : 512 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov 
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe up cid xtpr
bogomips        : 5606.14

$ cat /proc/interrupts
           CPU0       
  0:    8459330    IO-APIC-edge  timer
  1:         12    IO-APIC-edge  i8042
  7:          0    IO-APIC-edge  parport0
  8:          3    IO-APIC-edge  rtc
  9:         16   IO-APIC-level  acpi
 12:        119    IO-APIC-edge  i8042
 14:     295880    IO-APIC-edge  ide0
 15:      84851    IO-APIC-edge  ide1
169:    2029963   IO-APIC-level  yenta, [EMAIL PROTECTED]:0000:01:00.0
177:     248454   IO-APIC-level  ohci1394, yenta, eth2, bcm43xx
185:     274791   IO-APIC-level  skge, SiS SI7012
193:          1   IO-APIC-level  ohci_hcd:usb1
201:          0   IO-APIC-level  ohci_hcd:usb2
209:          0   IO-APIC-level  ohci_hcd:usb3
217:      29690   IO-APIC-level  ehci_hcd:usb4
NMI:          0 
LOC:    8459172 
ERR:        109
MIS:          0

p.s. my laptop is 3,5 years old and Asus has not released new bios
versions for years. Given the fact that linux always worked just fine
would probably mean that this is an operating system, not a bios
problem.

** Attachment added: "full dmesg output"
   http://librarian.launchpad.net/5737322/dmesg.txt

-- 
APIC error on CPU0: 40(40)
https://launchpad.net/bugs/66900

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