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
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>