[linux-audio-user] Installing realtime kernel - gentoo ERRORs loading realtime module

[Brad Fuller]

Marc-Olivier Barre wrote:
> On 3/25/07, Brad Fuller <brad at sonaural.com> wrote:
>> I'm following the directions on the wiki for the RT kernel at:
>> http://proaudio.tuxfamily.org/wiki/index.php?title=Realtime_%28RT%29_Kernel 
>>
>>
>> and I'm at the point of modprobe'ing the realtime module in the
>> instructions which say:
>>
>> -----------------
>> load realtime-lsm
>>
>>   # modprobe commoncap
>>   # modprobe realtime gid=18
>> -----------------
>>
>> But, I receive this error:
>>
>> FATAL: Error inserting realtime
>> (/lib/modules/2.6.16-rt29-tglx4/extra/realtime.ko): Invalid module 
>> format--
>>
>> when modprobe'ing the "realtime" module.
>>
>> Why is this?  The kernel and the module were compiled with the same 
>> tools.
>
> Hi Brad,
>
> You may have not seen it but on the wiki you pointed to, in the part
> called "Activate and test RT" the realtime-lsm module is marked as
> deprecated. 

CRAP! I simply didn't see that! Thanks for the reply and thanks for 
pointing this out!
> if you go a little further in the document you will find a
> section called "RLIMITS" (right after the realtime-lsm one).
>
> The currently recommended method to get realtime to work is to use the
> rlimits method with PAM, which you should normally have on your
> system. It will make things a lot easier for you.
>
> The tutorial might be taking some shortcuts (depending on your
> configuration). If after following the tutorial's info it still
> doesn't work, try the following :
>
> - check that your user is part of the audio group
> - from a terminal, type in the following command :
> grep "pam_limits.so" /etc/pam.d/{gdm,kdm,xdm,login} 2> /dev/null
Aha, well. I have it none.
How would this get added?

>
> you should see lines like this :
> /etc/pam.d/login:session     required       pam_limits.so
>
> In this example, the file named /etc/pam.d/login contains the modules
> used by pam when you authenticate with the login program. The line
> that appeared (normally) on your screen states that the pam_limits.so
> module will be used. That's the one you want.
>
> Please give us some feedback on how it went and ask again if it didn't 
> work.
>
> Cheers,
> __________________
> Marc-Olivier Barre,
> Markinoko.
>


-- 
brad fuller
 http://www.Sonaural.com/
 +1 (408) 799-6124