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#26 2012-01-22 14:40:32

Rolinh
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From: Switzerland
Registered: 2011-05-07
Posts: 144
Website

Re: [linux-3.2] watchdog: error registering /dev/watchdog

I had the same problem on my Thinkpad T420. Blacklisting MEI fixed the issue, thanks to you.

EDIT: I do not use testing repos

EDIT2: wow, it seems that this leads to major power regression (like 2 hours less autonomy on my laptop). Is it possible? What is the mei module anyway?

Last edited by Rolinh (2012-01-22 14:54:20)

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#27 2012-01-22 15:34:47

Morlab
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From: Russia
Registered: 2012-01-22
Posts: 1

Re: [linux-3.2] watchdog: error registering /dev/watchdog

I noticed the same problems with MEI driver and power consumption on my Lenovo X220, but I am not sure if they are related.

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#28 2012-01-22 15:36:15

laloch
Member
Registered: 2010-02-04
Posts: 181

Re: [linux-3.2] watchdog: error registering /dev/watchdog

Rolinh wrote:

EDIT2: wow, it seems that this leads to major power regression (like 2 hours less autonomy on my laptop). Is it possible? What is the mei module anyway?

Normally I would say that the MEI is a part of Intel Active Management Technology which is basically a remote management solution present in vPro chipsets and as such has nothing to do with power consumption. *But* my experience is that when I disable the AMT completly via BIOS setup, I loose even the builtin i5 mobile CPU frequency scaling features. ...Anyone from Intel here? :-)

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#29 2012-01-22 16:40:49

Rolinh
Member
From: Switzerland
Registered: 2011-05-07
Posts: 144
Website

Re: [linux-3.2] watchdog: error registering /dev/watchdog

Thanks for your answer. Well, I did a research about mei but I thought it could not be related. However, I unblacklisted the module (so I get the error at boot again now) but I regained the 2 hours I had lost. I did not change anything else. Pretty weird...

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#30 2012-01-22 19:04:50

laloch
Member
Registered: 2010-02-04
Posts: 181

Re: [linux-3.2] watchdog: error registering /dev/watchdog

You can still blacklist the other watchdog driver (probably the iTCO_wdt module) to get rid of the error message.

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#31 2012-01-23 07:35:25

Rolinh
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From: Switzerland
Registered: 2011-05-07
Posts: 144
Website

Re: [linux-3.2] watchdog: error registering /dev/watchdog

Ok, I'll have a look at that. Thanks.

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#32 2012-01-26 07:42:39

JamieKitson
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From: UK
Registered: 2010-10-18
Posts: 137
Website

Re: [linux-3.2] watchdog: error registering /dev/watchdog

I have the same issue. If I blacklist iTCO_wdt I just get a different error message with the same 25 second pause:

Thu Jan 26 07:37:43 2012: :: Waiting for UDev uevents to be processed    [BUSY] udevd[145]: worker [163] timeout, kill it
Thu Jan 26 07:37:43 2012:
Thu Jan 26 07:37:43 2012: udevd[145]: seq 1219 '/devices/pci0000:00/0000:00:1c.1/0000:03:00.0' killed
Thu Jan 26 07:37:43 2012:
Thu Jan 26 07:37:43 2012: udevd[145]: worker [163] terminated by signal 9 (Killed)

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#33 2012-01-26 07:46:09

JamieKitson
Member
From: UK
Registered: 2010-10-18
Posts: 137
Website

Re: [linux-3.2] watchdog: error registering /dev/watchdog

Actually I seem to get that whether I blacklist iTCO_wdt or not.

Last edited by JamieKitson (2012-01-26 07:48:18)

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#34 2012-01-26 20:19:10

Sidhartha
Member
Registered: 2011-12-03
Posts: 40

Re: [linux-3.2] watchdog: error registering /dev/watchdog

Same here... What is the current answer to this? I'm concerned about implementing a solution that is going to cost be battery time...

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#35 2012-01-26 21:30:56

laloch
Member
Registered: 2010-02-04
Posts: 181

Re: [linux-3.2] watchdog: error registering /dev/watchdog

Jamies problem is IMO completely unrelated.

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#36 2012-01-26 21:34:59

Gusar
Member
Registered: 2009-08-25
Posts: 3,470

Re: [linux-3.2] watchdog: error registering /dev/watchdog

laloch wrote:

Jamies problem is IMO completely unrelated.

Yep. This, probably: https://bbs.archlinux.org/viewtopic.php?id=134012

As for the watchdog error... Have you guys thought about simply ignoring it? If you otherwise don't see any issues with the machine, watchdogs aren't really that critical to have. Unless it's about a server that's quite a bit away from your current position.

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#37 2012-01-26 21:44:03

laloch
Member
Registered: 2010-02-04
Posts: 181

Re: [linux-3.2] watchdog: error registering /dev/watchdog

Gusar wrote:

Have you guys thought about simply ignoring it? If you otherwise don't see any issues with the machine, watchdogs aren't really that critical to have. Unless it's about a server that's quite a bit away from your current position.

Yep, you are right. I don't understand them either. I bet no one is running watchdogd anyway.

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#38 2012-01-26 22:22:46

JamieKitson
Member
From: UK
Registered: 2010-10-18
Posts: 137
Website

Re: [linux-3.2] watchdog: error registering /dev/watchdog

Gusar wrote:
laloch wrote:

Jamies problem is IMO completely unrelated.

Yep. This, probably: https://bbs.archlinux.org/viewtopic.php?id=134012

Yes it was, thanks.

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#39 2012-01-26 22:29:06

Gusar
Member
Registered: 2009-08-25
Posts: 3,470

Re: [linux-3.2] watchdog: error registering /dev/watchdog

laloch wrote:

I don't understand them either.

It's an OCD "must get rid of all errors!" thing. Quite an amusing phenomenon.

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#40 2012-02-17 17:19:36

mini
Member
Registered: 2006-12-18
Posts: 132

Re: [linux-3.2] watchdog: error registering /dev/watchdog

Is there any solution here? I still have this error.

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#41 2012-02-17 21:45:05

Lars Stokholm
Member
From: Denmark
Registered: 2009-03-17
Posts: 223

Re: [linux-3.2] watchdog: error registering /dev/watchdog

mini wrote:

Is there any solution here? I still have this error.

Apparently we're obsessing. smile Anyway, I finally created a bug report upstream.

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#42 2012-04-17 19:23:09

mini
Member
Registered: 2006-12-18
Posts: 132

Re: [linux-3.2] watchdog: error registering /dev/watchdog

Any news here

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#43 2012-05-07 16:15:53

teateawhy
Member
From: GER
Registered: 2012-03-05
Posts: 1,060
Website

Re: [linux-3.2] watchdog: error registering /dev/watchdog

bump: affected, too

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#44 2012-05-24 02:18:22

Sara
Member
From: USA
Registered: 2009-07-09
Posts: 219
Website

Re: [linux-3.2] watchdog: error registering /dev/watchdog

I just disabled the mei module in my kernel config as suggested here, and I didn't notice a power regression, so for me, that was the solution to this problem.

Last edited by Sara (2012-05-24 02:18:51)


Registed Linux User 483618

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#45 2012-08-26 12:45:50

feNNec
Member
Registered: 2010-09-11
Posts: 23

Re: [linux-3.2] watchdog: error registering /dev/watchdog

xr4y wrote:

Lars, I had the same problem on my Thinkpad x220i.

From the /var/log/errors.log

Jan 20 11:12:50 localhost kernel: [    4.888313] watchdog: error registering /dev/watchdog (err=-16).
Jan 20 11:12:50 localhost kernel: [    4.888377] mei: unable to register watchdog device.

Blacklisting mei:

echo blacklist mei > /etc/modprobe.d/mei.conf

No more errors during boot!

+1 with Thinkpad x220i

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