[lttng-dev] LTTng not generating trace contents

[Alexandre Montplaisir]

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 at drdc-rddc.gc.ca> wrote:
>
>> ----------------------------------------------------------------------
>> Date: Sun, 6 Jul 2014 18:49:51 -0400
>> From: Shariyar <syed.shariyar at 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)
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>> Cyber Security (MCCS)
>> RDDC - Centre de recherches de Valcartier | DRDC - Valcartier Research
>> Centre
>> 2459 route de la Bravoure
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>> CANADA
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>> 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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