Jaunty beta + RT + Jackd + Ardour, it works ;-D
laurent.bellegarde
laurent.bellegarde at free.fr
Wed Apr 8 17:24:03 BST 2009
Cory K. a écrit :
> laurent.bellegarde wrote:
>
>> So packagers have to correct this problem of right to allow simple user
>> (here it's laurent) to launch qjackctl with RT kernel as in hardy, and
>> everythnig is ok.
>>
>
> This should already be done by default with the -audio package /or/ it's
> done with Ubuntu Studio Controls.
>
>
> -Cory K.
>
>
Hi again,
i've done a new reboot, compared hardy's limits.conf to jaunty'one, and so
hardy'one working :
@audio - rtprio 99
@audio - memlock 999844
jaunty'one working but if i launch with sudo
@audio - memlock 770240
@audio - rtprio 99
@audio - nice -10
so I check ubuntustudio controls, everything is ok, the limits.conf is
like the controls in GUI.
then i have a look to laurent un user, and see that in groups, there was
no audio group. I add one, and tick laurent and root as members of this
group, i've done a new reboot, and now i can launch qjackctl + ardour on
RT without any xruns at 2,9ms latency !!!
what is surprising is that in hardy, i check audio group presence,
there's none !!! but qjackctl is available as none root ???
But now, I understand why in hardy, changing the size of allowed memory
change nothing face to the ardour message which was telling me there was
a limit in my system...that's normal, because laurent is not in an audio
group, so limits.conf can't work...
So I can't explain why in same condition hardy settings are working and
why jaunty not, but after adding an audio group, and tick your account
user in it, a reboot, it works perfectly...
RT kernel is ok for stable release the 23 of april...
Laurent
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