[ltt-dev] LTT on BeagleBoard

[Mathieu Desnoyers]

* Gianluca Valentino (g_v_valentino at hotmail.com) wrote:
> 
> Dear all,
> 
> I have patched a BeagleBoard Ubuntu kernel with the ltt patch, and then installed ltt-control and lttv as explained in the manual.
> 
> After doing ltt-armall and lttv-gui, I get the LTTV window, and I press on the traffic light icon as explained. 
> 
> I enter my root password, which I know is correct since after entering 'su' in a bash shell, I get the prompt for the password, and on entering it I enter the root shell.
> 
> However when I press start, I get the error:
> 
> "A problem occured when executing the su command: Unknown error 239".
> 
> Could some one please help me out?

Ubuntu has "su" disabled by default. Please see Ubuntu-specific document
about how to enable "su", or use the alternate command line "lttctl" to
start/stop tracing.

Have a look at dmesg to try to solve your zero-sized trace files
problem. It looks like you are not stopping/destroying your trace
session appropriately.

Thanks,

Mathieu

> 
> Regards,
> 
> Gianluca
>  		 	   		  
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-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com