Re: LTTng not generating trace contents

From: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
To: Shariyar <syed.shariyar@gmail.com>
Cc: "lttng-dev@lists.lttng.org" <lttng-dev@lists.lttng.org>
Subject: Re: LTTng not generating trace contents
Date: Mon, 07 Jul 2014 14:04:02 -0400	[thread overview]
Message-ID: <53BAE112.4000809__17788.3343691521$1404756292$gmane$org@voxpopuli.im> (raw)
In-Reply-To: <CAKQh6pjJ9SUFKtLwONVySiPbtP-udZCfs9L87mGszPVPCu2PKA@mail.gmail.com>

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Hi,

Could you just do
$ sudo apt-get install --reinstall lttng-modules-dkms

and check in the output if you have any errors, or if it really installs 
successfully?

Maybe Ubuntu's patches already trickled down to 12.04 and you might be 
hitting https://bugs.lttng.org/issues/814

Thanks,
Alexandre

On 07/07/2014 01:43 PM, Shariyar wrote:
>   lttng --version,
>      lttng (LTTng Trace Control) 2.4.1 - Époque Opaque
>
>   lttng-sessiond --version
>      2.4.1
>
>
> I removed all LTTng packages from the system by manually searching in dpkg
> and reinstalled it as follows:
> sudo apt-get install lttng-tools lttng-modules-dkms babeltrace
>
> The ppa in the system is: http://ppa.launchpad.net/lttng/ppa/ubuntu
>
> Now, I get the following error:
> sudo lttng list -k
> Error: Unable to list kernel events: Kernel tracer not available
> Error: Command error
>
> I have encountered this problem on two different systems running Ubuntu
> 12.04, after the update of system and LTTng
>
> Regards,
> Shariyar
>
>
> On Mon, Jul 7, 2014 at 11:42 AM, Thibault, Daniel <
> Daniel.Thibault@drdc-rddc.gc.ca> wrote:
>
>> ----------------------------------------------------------------------
>> Date: Sun, 6 Jul 2014 18:49:51 -0400
>> From: Shariyar <syed.shariyar@gmail.com>
>>
>>> I am having a problem in generating a kernel trace using the latest
>> LTTng on Ubuntu 12.04.
>>> It was working fine previously but when I updated LTTng it stopped
>> generating the trace contents. I did an uninstall and reinstall but it
>> didn't work either.
>> ----------------------------------------------------------------------
>>
>>     Please define what you mean by "the latest LTTng".  What are the
>> versions?  ($ lttng --version, $ lttng-sessiond --version)
>>
>> Daniel U. Thibault
>> Protection des systèmes et contremesures (PSC) | Systems Protection &
>> Countermeasures (SPC)
>> Cyber sécurité pour les missions essentielles (CME) | Mission Critical
>> Cyber Security (MCCS)
>> RDDC - Centre de recherches de Valcartier | DRDC - Valcartier Research
>> Centre
>> 2459 route de la Bravoure
>> Québec QC  G3J 1X5
>> CANADA
>> Vox : (418) 844-4000 x4245
>> Fax : (418) 844-4538
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>> Gouvernement du Canada | Government of Canada
>> <http://www.valcartier.drdc-rddc.gc.ca/>
>>
>
>
> _______________________________________________
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> lttng-dev@lists.lttng.org
> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

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