[lttng-dev] Module lttng_tracer not found.

[Alexandre Montplaisir]

Hi,

What steps did you use to install LTTng?

Also can you please paste the output of:
$ apt-cache policy lttng-modules-dkms


Thanks,

-- 
Alexandre Montplaisir
DORSAL lab,
École Polytechnique de Montréal



On 12-07-29 04:26 PM, Rui Han wrote:
> Hi,
>
> I used lttng last week and didn't touch it ever since. I am trying to use
> it again. I use lttng list -k, it give me error messages:
>
> FATAL: Module lttng_tracer not found.
> Error: Unable to load module lttng-tracer
> Error: Unable to remove module lttng-tracer
> Warning: No kernel tracer available
> Error: Unable to list kernel events
>
> I run kernel tracing as root. At first, I thought I have to start the
> daemon by lttng-sessiond command. It gave me the error: "Error: Already
> running daemon." At this time, I can create session, it gave "Session
> session created. Traces will be written in
> /root/lttng-traces/session-20120729-160806". However, it failed to generate
> a single term of tracing. While I tried lsmod, there are no lttng related
> module in the list. Which I remember there were several. The same thing
> happened to my two ubuntu systems. I restarted the system, it still doesn't
> work. Does any one know how to make lttng work again in this situation?
>
> Thank you very much.
>
> Best regards,
> Rui