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Thread: Watchdog Error Message?

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  1. #1
    Join Date
    Feb 2009
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    Kubuntu 12.04 Precise Pangolin

    Watchdog Error Message?

    When Waking from Suspend, I have 3 error messages appear about Watchdog.
    When I ran dmesg I found this:
    Code:
    [18507.824679] watchdog: only one watchdog can use /dev/watchdog.
    [18507.824684] watchdog: error registering /dev/watchdog (err=-16).
    [18507.824687] mei: unable to register watchdog device.
    Does anyone know what this is?
    Is it important?
    Will it affect my system?
    This has only started happening in 12.04.

  2. #2
    Join Date
    Apr 2008
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    101

    Re: Watchdog Error Message?

    Yes. It seems to be benign, but it's annoying.

    A little digging turns up this thread on Arch which goes into a fair bit of detail about the problem. According to the discussion there, the problem is that you've got two watchdog drivers loaded but the kernel supports only one at a time. Blacklisting the "mei" module should make the messages go away. I will try it and report back.

  3. #3
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    Re: Watchdog Error Message?

    Thanks for looking at this Jim.
    I will wait to hear from you.

  4. #4
    Join Date
    Apr 2008
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    Re: Watchdog Error Message?

    OK. Seems to work. I created the file '/etc/modprobe.d/mei.conf' containing the line
    Code:
    blacklist mei
    This silenced the annoying barking from the watchdog.
    It seems a bit of a cop-out, but my efforts to dig deeper into the problem left me none the wiser, and since both watchdog and MEI are firmly in the "why do I even have one of those?" category right now as far as I'm concerned, I'm not planning on spending any more time on it.

  5. #5
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    Re: Watchdog Error Message?

    Quote Originally Posted by jim_24601 View Post
    OK. Seems to work. I created the file '/etc/modprobe.d/mei.conf' containing the line
    Code:
    blacklist mei
    This silenced the annoying barking from the watchdog.
    It seems a bit of a cop-out, but my efforts to dig deeper into the problem left me none the wiser, and since both watchdog and MEI are firmly in the "why do I even have one of those?" category right now as far as I'm concerned, I'm not planning on spending any more time on it.
    Thanks that seems to work.
    Actually you can add "blacklist mei" straight to /etc/modprobe.d/blacklist.conf, without creating a new folder.
    Thanks for all your help, i'll mark the thread as solved.

  6. #6
    Join Date
    Aug 2012
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    Question Re: Watchdog Error Message?

    Hey there,
    I'm pretty new to Ubuntu and linux altogether. Ive been having the same watchdog error message upon resume and although its benign, I like everything to be as perfect as possible. Can you just instruct me on what exactly i type into terminal? Where do I add the "blacklist mei"? All help is greatly appreciated!

    thanks!

  7. #7
    Join Date
    Jun 2013
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    3

    Re: Watchdog Error Message?

    does this breach any security?

  8. #8
    Join Date
    Jan 2013
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    Ubuntu Budgie 18.04 Bionic Beaver

    Re: Watchdog Error Message?

    Quote Originally Posted by invictuschamp View Post
    does this breach any security?
    Not that i'm aware of.
    The other way to get rid of this message is to update to a later kernel.
    In the backports there is kernel 3.5xx & 3.8xx.

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