Public bug reported:
Binary package hint: linux-image-2.6.24-19-generic
---------Description of the problem:---------------
On some events, the PC, running Kubuntu 8.04 starts to get slow. Top shows that
all processing power is shared between some running processes.
Namely: Xorg, dd, klogd and some other current active processes like kopete
or k3b.
Terminating all CPU consuming non-root processes results in sharing
all CPU power between dd and klogd.
When this happens dmesg only consist of the message
APIC error on CPU0: 08(08)
I looked into var/log/syslog and counted the amounts of this message.
Taking one second as example the message was repeated 748 times.
It looks like sometimes it happens even more frequent and syslog only captures
part of the message.
Stopping syslog, the CPU still stays high and the system responses slow,
but there is no obious process visible, using significant CPU time.
At least once it fully crashed some minutes later.
--------------How to repeat the problem:-----------------
The system were running with Kubuntu 6.06 for nearly a year without such
problems. Switching to Kubuntu 8.04 some months ago (fresh install), the problem
happened from time to time and seems to happen much more frequent in the recent
weeks (up to four times a day).
I discovered, that the problem can be repeated if someone selects an iso image
in k3b and then its happening somewhere in the process of calculating
the md5sum of the selected image.
The problem disappears as soon as the system gets restarted.
As the message says something about APIC, I tried the noapic boot option, with
the result that the system completely crashes seconds (1..30) after someone
logs in at the KDM screen. If this happens, the PC can't even be pinged anymore.
I further tried the combination of noapic, nolapic, acpi=off which resulted in
the same behaviour.
-------------The system------------------
The system is an AthlonXP 1800+ and an ATI 9600 graphic card, using the open
source 3d accelerated drivers coming with the distribution.
lspci reports:
00:00.0 Host bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333]
00:01.0 PCI bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333 AGP]
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 80)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 80)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 80)
00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8235 ISA Bridge
00:11.1 IDE interface: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237
AC97 Audio Controller (rev 50)
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 74)
01:00.0 VGA compatible controller: ATI Technologies Inc RV350 AP [Radeon 9600]
01:00.1 Display controller: ATI Technologies Inc RV350 AP [Radeon 9600]
(Secondary)
-----------Expected behavior-----------
Not to get slow.
Is this a bug, or a hardware failure? And is there any way to go around the
problem?
(I have full access to the hardware for the next two days, after this time it is
getting difficult as my sister moves with the PC to a new location).
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
APIC error on CPU0: 08(08) slows down system
https://bugs.launchpad.net/bugs/277767
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