events/0 spikes CPU every 3 seconds since upgrade to 2.6.31-20

[Charlie DeTar]

Since upgrading to the 2.6.31-20-generic kernel on my Lenovo Thinkpad X61s, one core of the CPU is spiking approximately every 3 seconds. Top indicates the process that is spiking the CPU is "events/0". This did not occur prior to the 2.6.31-20-generic upgrade.

ProblemType: Bug
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 2/2
   Subdevice #0: subdevice #0
   Subdevice #1: subdevice #1
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: tc1 2598 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfe020000 irq 17'
   Mixer name : 'Analog Devices AD1984'
   Components : 'HDA:11d41984,17aa20d6,00100400'
   Controls : 30
   Simple ctrls : 19
Date: Thu Mar 11 09:37:01 2010
DistroRelease: Ubuntu 9.10
HibernationDevice: RESUME=UUID=4993dee3-6e6f-4230-abd1-c6b76ea07d27
MachineType: LENOVO 7668CTO
Package: linux-image-2.6.31-20-generic 2.6.31-20.57
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: root=UUID=1dfcdaa6-c454-4f19-949c-3c86c4b46729 ro quiet splash
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.31-20.57-generic
RelatedPackageVersions:
 linux-backports-modules-2.6.31-20-generic N/A
 linux-firmware 1.26
SourcePackage: linux
Uname: Linux 2.6.31-20-generic i686
WpaSupplicantLog:

dmi.bios.date: 07/02/2007
dmi.bios.vendor: LENOVO
dmi.bios.version: 7NET25WW (1.06 )
dmi.board.name: 7668CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7NET25WW(1.06):bd07/02/2007:svnLENOVO:pn7668CTO:pvrThinkPadX61s:rvnLENOVO:rn7668CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 7668CTO
dmi.product.version: ThinkPad X61s
dmi.sys.vendor: LENOVO

[Charlie DeTar (chazen)]

On further exploration, this seems to be related to the LAN card which is also no longer functioning.

``ifconfig eth0 down`` stops the CPU spikes.

As indicated in the above attachments, my LAN card is:

03:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection [8086:4227] (rev 02)
 Subsystem: Intel Corporation Device [8086:1010]
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0, Cache Line Size: 64 bytes
 Interrupt: pin A routed to IRQ 29
 Region 0: Memory at dfcff000 (32-bit, non-prefetchable) [size=4K]
 Capabilities: <access denied>
 Kernel driver in use: iwl3945
 Kernel modules: iwl3945

[rejon (rejon)]

I confirm turning off the eth0 fixes this problem on x61 running same setup and kernel.

[Charlie DeTar (chazen)]

Pardon my earlier confusion. Of course, the 3945ABG is a wireless lan card, and the problematic device in this ticket is the wired LAN card. The correct device is:

00:19.0 Ethernet controller [0200]: Intel Corporation 82566MM Gigabit Network Connection [8086:1049] (rev 03)
 Subsystem: Lenovo Device [17aa:20de]
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Interrupt: pin A routed to IRQ 27
 Region 0: Memory at fe000000 (32-bit, non-prefetchable) [size=128K]
 Region 1: Memory at fe025000 (32-bit, non-prefetchable) [size=4K]
 Region 2: I/O ports at 1840 [size=32]
 Capabilities: <access denied>
 Kernel driver in use: e1000e
 Kernel modules: e1000e

The difficulty seems to be arising from the e1000e module. In addition to disabling eth0 with ``ifconfig eth0 down``, the CPU spikes can be stopped by removing the e1000e module with ``modprobe -r e1000e``.

Wired LAN does not currently function, and the hardware LEDs are constantly lit.

[Jeremy Foshee (jeremyfoshee)]

Hi Charlie,

This bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux 537396

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

    [This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Charlie DeTar (chazen)]

Updates from a couple of weeks ago fixed this bug in Karmic for me. It seems appropriate to close this bug here. I will soon be upgrading to Lucid, and if the problem exists there, I would be happy to open a new bug.

[JohnAspinall (jga)]

I am seeing this bug in a 10.04 upgrade.
(I'm new to this. What info would you like?)

Hardware is Lenovo R61, x86_64 install.
(See cpu spikes on this forum thread: http://ubuntuforums.org/showthread.php?t=1484450 )

[Charlie DeTar (chazen)]

This bug has just returned for me as well, this afternoon, under Lucid. The symptoms are the same as before -- CPU spikes about every 3 seconds, the ethernet port's lights remain perpetually lit, ethernet is non-functional, and my CPU process monitor graph looks just like JohnAspinall's on the forum thread. Removing the e1000e module (``sudo modprobe -r e1000e``) squelches the CPU spikes. Attempting to reinstall the module (``sudo modprobe e1000e``) takes approximately 2 minutes during which the CPU is pegged; after reinstaling the module, the port lights remain lit and the port remains nonfunctional, but the CPU spikes are gone.

If I boot into the previous kernel version (2.6.32-21-generic) I have no problem, eth0 works as expected with no aberrant spikes or stuck lights.

[Jeremy Foshee (jeremyfoshee)]

Charlie / John,
    I'd really like to get new bug reports from you so that we can look at each individually. This will allow me to get fresh data on both of your hardware and enable the team to identify issues as they look into the logging provided.

Thanks!

~JFo

[JohnAspinall (jga)]

Happy to so, but like I said up-thread I'm new at this so will need some additional degree of hand-holding.
Questions:
1. I assume you would like the new bug report to point back at this one; what is the formal way of doing so?
2. I see in this report a whole collection of logs and diagnostic output; is there a list of what I should collect, and how to do so?

[Charlie DeTar (chazen)]

Argh, it's intermittent for me, I can't get myself into the buggy state again now after running in the older kernel for a day! I'll post fresh logs if symptoms return. JohnAspinall, perhaps you can queue up fresh logs when you're experiencing buggy behavior.

You can report the kernel bug using the "ubuntu-bug" tool. General guidelines are here:
https://help.ubuntu.com/community/ReportingBugs

From the command line (or in a run dialog), assuming you're running the latest generic kernel (2.6.32-22-generic), run:

ubuntu-bug linux-image-2.6.32-22-generic

You should run this while experiencing symptoms with hope that evidence of the problem will appear in the logs. I don't know of a way to get this bug reporting tool to attach reports to an existing bug; you may as well post it as a new bug.

[Charlie DeTar (chazen)]

Oops, just discovered apport-collect.

apport-collect 537396

ought to attach your logs to this report.

[JohnAspinall (jga)]

AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 2/2
   Subdevice #0: subdevice #0
   Subdevice #1: subdevice #1
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: jga 1456 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfe220000 irq 17'
   Mixer name : 'Analog Devices AD1984'
   Components : 'HDA:11d41984,17aa20bb,00100400'
   Controls : 30
   Simple ctrls : 19
Card29.Amixer.info:
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 7KHT22WW-1.06'
   Mixer name : 'ThinkPad EC 7KHT22WW-1.06'
   Components : ''
   Controls : 1
   Simple ctrls : 1
Card29.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
DistroRelease: Ubuntu 10.04
HibernationDevice: RESUME=UUID=1f2f4b5b-b538-4ea9-ab19-825f6c85930a
MachineType: LENOVO 8918CTO
Package: linux (not installed)
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: root=UUID=bccfc666-f67f-4f1a-9b04-7f589608522b ro quiet splash
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Regression: Yes
RelatedPackageVersions: linux-firmware 1.34
Reproducible: Yes
Tags: lucid kconfig regression-release needs-upstream-testing
Uname: Linux 2.6.32-22-generic x86_64
UserGroups: adm admin audio cdrom dialout dip floppy lpadmin netdev plugdev powerdev scanner video
WpaSupplicantLog:

dmi.bios.date: 08/22/2007
dmi.bios.vendor: LENOVO
dmi.bios.version: 7KET71WW (1.21 )
dmi.board.name: 8918CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7KET71WW(1.21):bd08/22/2007:svnLENOVO:pn8918CTO:pvrThinkPadR61:rvnLENOVO:rn8918CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 8918CTO
dmi.product.version: ThinkPad R61
dmi.sys.vendor: LENOVO

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

apport information

[JohnAspinall (jga)]

I hope this helps. I tried to make a new bug on PID 10 (the runaway events process) but it won't let me report on a process that isn't mine.

[Jesper Kjær Nielsen (jkjaer)]

JohnAspinall: Ever since I installed Ubuntu Lucid a couple of weeks ago, I have suffered form the same problem as you, i.e., repeated CPU-spikes and ethernet port lights on (on a lenovo T61).

Today I tried to experiment a little by loading a live CD with Ubuntu Jaunty, but I experienced the same problem. Then I tried to load Windows Vista which was also not able to use the ethernet port. This led me to the conclusion that my ethernet port probably was broken.

As a last experiment, I powered off the laptop, unplugged it and removed its battery for approximately a minute. Then I connected the battery, the power and turned it on. And guess what: It apparently solved the problem! I now have a functioning ethernet port and the CPU-spikes are gone.

I hope this low tech solution also works for you.

[JohnAspinall (jga)]

Yes, works for me too. I'm delighted to have Ethernet back; not so happy at time wasted on flaky hardware. As far as I'm concerned, this report can be marked as resolved. Thanks for the tip, jkjaer, and thanks everyone for assistance.

[Jeremy Foshee (jeremyfoshee)]

marking invalid due to the fix being removal of the battery.

~JFo

[spradders (junk-spradbery)]

Ah, I had the same problem since the latest Ubuntu updates.... 100% cpu spiking every few seconds... solved by killing eth0. Then shutdown, unplug, remove battery fixed it for me too.

[Fredrik Wendt (fredrik-wendt)]

I've used the same Lenovo ThinkPad T61 (64665VG) since February 2008 and I've never had any issues with wired ethernet (eth0) before I installed Lucid. I'm surprised that you closed this software related bug without seeking an explanation.

[Wayne Scott (wsc9tt)]

My daughter has a T61 with the same problem. (running stock 10.04) Running 'ifconfig eth0 down' fixed the problem. That machine also has a Vista partition. I haven't proved it yet, but my theory is that everything was working fine until she rebooted into Vista and after returning to linux the problem appeared. Perhaps the Windows drivers are loading new firmware or changing the config on that card.

Something to try. I will try the removing the battery trick later and then see if I can make it come back after going into Vista.

[JohnAspinall (jga)]

An interesting theory, although: additional data point, my
symptom-exhibiting R61 has never booted any flavor of Windows.

On 06/19/2010 12:00 PM, Wayne Scott wrote:
> My daughter has a T61 with the same problem. (running stock 10.04)
> Running 'ifconfig eth0 down' fixed the problem. That machine also has a
> Vista partition. I haven't proved it yet, but my theory is that
> everything was working fine until she rebooted into Vista and after
> returning to linux the problem appeared. Perhaps the Windows drivers
> are loading new firmware or changing the config on that card.
>
> Something to try. I will try the removing the battery trick later and
> then see if I can make it come back after going into Vista.
>
>

[SamLeslie (sbleslie)]

I'm seeing the same issue with the latest kernal (2.6.32-24) on a Lenovo T61p with Lucid. Running 'sudo ifconfig eth0 down' does seem to solve the problem with the CPU spikes, although my ethernet lights remain active which is odd.

I'm not convinced this is truly a hardware issue, but if I have time later all attempt the battery removal and see what happens.

[Kevin Lenaghan (kevin-lenaghan)]

I have a lenovo R61 7736-CTO

In the last 2 weeks I have had strange slowness issues that have never happened on my laptop before. One of the reasons for using Ubuntu was the support fast startup speeds and the quick response of the apps including firefox.

I took the advice of the above and ran "sudo ifconfig eth0 down". Problem was gone instantly. No nore slow internet browsing no more hangs and missed key strokes.

It does seem to tie into the last big update however I also did the following in the last month.

Upgrade Openoffice from 3.2 to 3.2.1
Upgrade Virtualbox to latest version 3.2.6 r63112

my ethernet lights are still on

[shapr (shae)]

I had this same problem about a week ago on my Lenovo X61t, ifdown eth0 fixed the problem.

[Christian Siefkes (christian-siefkes)]

Since today I'm affected too. I use Xubuntu Lucid/32-bit on a Lenovo X61s. "ifconfig eth0 down" fixed the problem for the time being; I didn't yet try the "remove battery" trick.

Re comment #32: I don't have Windows on my computer, that's not the issue.

I don't understand why the bug has been marked invalid.

[Javier Fonseca (jvrjava)]

I ran into this problem yesterday. Tried "ifconfig" and it would fix the problem for the session but the problem would return on. Got back to this problem an hour ago and tried removing the battery and power supply. Problem has been solved.

However I am interested in the fact that so many Ubuntu users are effected by this. Is there perhaps the possibility of Ubuntu causing a change to something at the hardware level? I'm not convinced that faulty hardware is the cause.

Running Ubuntu Lucid 10.04 LTS. Fully updated.
Lenovo ThinkPad T61 8895-2FU

[Dean Murphy (djmurf-gmail)]

Wanted to confirm I had the exact same problem.
Lenovo T61
Has never ran Windows. Put Ubuntu on the day I got this laptop over 3 years ago.
I can't say for sure that this started occurring with kernel 2.6.32-24 or not, but just happened to notice the lagging, and spiking cpu. events/0|1 was loading up the cpu.

onboard ethernet stuck with both lights on.
Did find that downing the onboard NIC stopped the spikes.
Pulling the battery also did the trick.

Running Ubuntu Lucid 10.04 LTS. Up to date.
Lenovo ThinkPad T61 6459-CTO

[Roy Shea (royshea)]

I can also confirm the same problem.

Lenovo ThinkPad T61 (Type 7663-13U)
Running Ubuntu Lucid 10.04 LTS (up to date as of Sep. 23, 2009)

First observed problem after I updated to the latest version of 10.04 LTS earlier this week. Initially noticed a lot of lag, checked on top and found that events/0 was spiking. Both lights on the Ethernet interface were lit up. Downing eth0 stopped the spikes, although the ethernet lights remain on. Have not yet tried pulling battery.

[Jesper Mathiassen (jesper-mathiassen)]

Low-tech solution worked for me. Thinkpad T61p with lagspikes and non-functioning ethernet.

[Thorbjørn Lindeijer (thorbjorn)]

Still there in Ubuntu 10.10, just had to pull eth0 down, which solved this issue for now on my Lenovo W510.

[JJ (jcjacks)]

Bug there on latest update of Ubuntu 10.04 (update performed 2010-Oct-21).
Computer is a Lenovo X61s.
Does anyone have a solution for this. I had the same problem several months ago and am sorry to see it back?
I can't use the ethernet port when this bug is there which is how I usually connect at work.

[johnbarnes (jingang425)]

still see this bug in ubuntu 10.10 on my Lenovo x61s.
I use "sudo ifconfig eth0 down" to solve the problem temporary...

[nubix (mseiz)]

same problem here on a lenovo T61p. and also for me: "ifconfig eth0 down" fixed the problem for the time being; I didn't yet try the "remove battery" trick either.

took me long to find this thread.. I measured the intervals and on my machine they are exactly 4 seconds between each stop / freeze. also I used "top" to see what is causing the 100% processor load spikes and found it is event/0 sometimes event/1 (lucky cpu seems to be selected during boot). now by putting "my" keywords into this thread I hope I can help others find it... in short: ubuntu 100% processor load every 4 seconds with event/0.

[T. Middleton (timtoo)]

Battery out, and unplug for a while, worked for me also. (Lenovo T61, Maverick)

Previously I tried booting with acpi=off, didn't help. I tried ifconfig eth0 down, didn't have any effect. Tried booting previous kernel, but it strangely had the same problem.

I wonder what was it that triggered linux and/or the hardware to suddenly behave this way... it has never happened before in my 2+ years of using this laptop with kubuntu.

[Wolfram Rittmeyer (rittmeyer)]

I can confirm this bug for T61 as well. On my T61 this bug appeared after the last update (November, 14th, 2010) on Ubuntu 10.10. Before everything worked fine.

"ifconfig eht0 down" works for me as well.

[Rüdiger Kupper (ruediger.kupper)]

I confirm the last post:

On my T61 this bug appeared after the last update (November, 15th, 2010) on Ubuntu 10.10. Before everything worked fine.
"ifconfig eht0 down" works for me as well.

[Amarasinghe (rtamarasinghe)]

I can confirm this bug on a Thinkpad R61, running Ubuntu 10.10 ifconfig eth0 down worked for me as well.
This laptop has run ubuntu 8.10 previously for several years without any issues.

[pascal germroth (pascal-germroth)]

Since switching to 2.6.35-23-generic-pae today I see this bug on my Dell desktop. It obviously can't be fixed by removing any battery…

100% spikes every 3 seconds, no connection (0 TX/RX bytes), stops when eth0 is pulled down.

When removing and re-adding using modprobe it uses 100% CPU for a minute, it doesn't when IntMode=2 is specified.

[pascal germroth (pascal-germroth)]

Oddly enough, the error persists when switching back to 2.6.35-22-generic-pae.

[spradders (junk-spradbery)]

The problem has returned since my latest kernel upgrade - 10.10 (Maverick), 2.6.35-23-generic-pae. Lenovo T61p. I guess a full power off will fix it again, but it's a poor solution (because if you don't know how to fix it you're stuck with no ethernet and a spiking cpu).

[Christof Länzlinger (laenzlinger)]

same here: Lenovo T61 2.6.35-24-generic

[herchu (herchu)]

Same problem happening on my T61. Ethernet lights are both lit; "ifconfig eth0 down" removes the cpu spkies on events/0 process. This happened this morning running Ubuntu 10.04. Just upgraded to Ubuntu 10.10 (running 2.6.35-24 kernel) and it stills happens on this kernel.

[herchu (herchu)]

Oh and by the way the low-tech workaround (shutdown, unplug, remove battery) worked.

[henson (anseaman)]

I experienced exactly the same problem with my Thinkpad T61.
One evening after waking the computer I noticed that the battery wasn't being recognized. I put the computer to sleep, pulled it out and put it back in, and after this the problem started with the wired ethernet.
The activity lights were on all the time, event/0 CPU usage would be very high, and every few seconds the computer would briefly become very laggy. This behaviour would go away temporarily when I used "ifconfig eth0 down" (which would take about 4 seconds to execute) but it would come back as soon as the computer was put to sleep and woken up again. Power cycling had not effect. I tried using an older version of the kernel but the problem persisted.
This went on for about a week until I found this thread. I shut the computer off, unplugged the battery and AC adapter, and let it sit for about 3 minutes.
When I started it back up the problem was gone!

[ubuntujonez (dennis-wonky)]

Upgraded netbook 10.04 -> 10.10. "events" process hogging cpu and slowing down the system.

Linux lenovo-t61 2.6.35-25-generic #44-Ubuntu SMP Fri Jan 21 17:40:48 UTC 2011 i686 GNU/Linux
Ubuntu 10.10

Downing eth0 fixed problem immediately, battery trick worked.

:/

[jalbrant (jeremiah-albrant)]

T61 2.6.35-25-generic 64-bit kernel. Rebooted this morning after some updates and had this exact same problem. Machine was very sluggish with events/0 or events/1 using the CPU every couple seconds. eth0 was not available. ifconfig eth0 down immediately fixed the problem but I use eth0 so not a good solution. The battery trick worked for me.

[wannes (wannes-lejeune)]

hallo,

having the same problem with thinkpad x61s type 7667 82566MM Gigabit Network Connection and ubuntu 10.04 2.6.32.29 generic 32bit.
i'm having this problem as long as i have this computer , but recently typing was going in slomotion.
i asked a 'unix friend' to have a look and he figured it was "events/0" that was eating al the power, he disabled e1000e in etc/rc.local and said this was not a good solution, but it works for now.
i have a win xp running on the machine and i'm not having the problem there , the lights are out.
i did try older kernels but did not change anything, the lights stay on.
i did not try the battery trick or the ifconfig eth0 down
if i can help anyware to fix the problem i will , but i'm not a linux hero.

[Chris Dickinson (chris-dickinson)]

Same problem here on Thinkpad X61s, Ubuntu 10.04, 32 bit. I had recently done the following:

- upgraded from 2gb to 4gb ram
- changed to the pae kernel version to support the 4gb of ram
- worked happily on my computer with the new kernel with 4gb of available ram
- suspended my computer
- used the hardware wifi switch to disable wifi upon resuming from suspension

The cpu spikes (with delayed keyboard and mouse reactivity) happened after the last 2 steps mentioned, not after the first 3.

[Chris Dickinson (chris-dickinson)]

the ifconfig fix worked for me as well. just to be sure I tried the battery fix as well and all seems to be fine after reboot.

[abw (arminwagner2008)]

I'm using Debian Squeeze, kernel 2.6.32-5 on a Thinkpad A31.

/var/log/kern.log is full of
eth1: New link status: Connected (0001)
Several log messages every few seconds

Doing ifconfig eth1 down stops the event/0 cpu hogging as well as the kernel error messages.
However, this is hardly a solution since the wireless card won't be useable anymore.

Doing ifconfig eth1 up gives me the following error message:
[22433.552023] hermes @ e0fca000: Timout waiting for the command 0x0121 completion.
[22433.552023] eth1: Error -16 setting MAC address
[22433.552023] eth1: Error -16 configuring card
SIOCSIFFLAGS

/var/log/messages shows me
ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
hermes @ e0fca000: Card removed while waiting for command 0x0002 completion
eth1: Unable to disable port while reconfiguring card
eth1: Resetting instead...
eth1: IRQ handler is looping too much! Resetting.

The battery removal ritual didn't work for me.

[isaacalves27 (isaacalves27)]

Hello

Issue persists on the last distributions / kernel

Same issue Lenovo R61i Ubuntu 12.04 LTS.

To take out the batery is not a good slution specialy if people are using their laptop with no power suply.

Something new on this bug?

Best regards

Isaac Alves

[kdvolder (kdvolder)]

I'm on 10.04 and as many other in the comments a Lenovo T61. I noticed this bug today as it was interfering with sound playback in VLC and MPlayer.

I'm seeing what many describe here: cpu spikes about every 3 seconds. Running 'top' shows me a process called 'events/0' is the one doing this.

I'm not really sure how long this bug has affected me though I haven't noticed it before.

sudo ifconfig eth0 down

And the CPU spikes stopped, sound playback ok again.
I mostly use this machine via the wireless so that is an ok fix for me.

I tried starting up with an older kernel "2.6.32.26" but the problem didn't get solved by that.

[kdvolder (kdvolder)]

The 'remove battery' trick worked for me as well.