[ardour-users] tmpfs jack problem

[chris]

actually, there is one other semi major difference, i'm not running the
RT kernel patches on my kernel (2.6.17.4 vanilla kernel), and only
running with the PREEMPT scheduling option (i tried one patch with the
above version, and i think it was mismatched, i haven't really gotten
round to trying another combination yet..). i don't know if the SMP also
affects any of this..

On Sat, 2006-07-15 at 23:46 +1000, chris wrote:
> hey all,
>    have been trucking on with ardour2 (from cvs/svn) for the last few
> months, and i suprise myself with the possibilities... anyway.. I just
> got a new laptop that i'm hoping to hook up with a freebob device a
> little later (when my bank account has recovered).. so i'm really just
> playing around at getting all the other stuff sort of ready before i get
> it.. but i'm not having much luck getting ramfs/realtime jack working.
> 
>    the specs of the laptop are (Dell d820) running FC5, 1.83Ghz Intel
> Core Duo (T2400), 2GB ram (677Mhz FSB), SATA 100GB Drive, and the
> onboard sound is hda-intel, which is working fine with gstreamer. the
> only other thing of note is i'm running Xgl/Compiz, but this didn't pose
> a problem on my desktop machine running pretty much the same setup
> setup, with much lower specs.
> 
>    i've setup the tmpfs mount and /etc/security/limits.conf. jack
> doesn't crash in non-realtime mode, but does in real time, after about 2
> seconds, yet interestingly allocates the space it needs in the tmpfs
> mount (so it's not a FIFO permissions thing). yet when i umount tmpfs,
> and run jack with realtime, i get pretty much the same output (and
> crash). i can't find much info on the snd-hda-intel card/driver, which
> is the only major difference from my desktop machine (desktop runs a
> delta44), so a thought was it's the card or driver, but then it works
> perfectly with gstreamer and as a raw alsa - /dev/dsp or whatever
> device.
> 
>    so any thoughts or known issues you could flag me would be very
> appreciated.
> 
>    thanks and kudos for the simply amazing software you guys are
> creating!!
> 
> 	Chris.