i have a similar setup, but with a TI expresscard firewire interface. i had
heard that TI worked better than my Thinkpad T61's Ricoh chipset, so i
ordered one specifically. i also have an FA-101.
as i mentioned in the previous post on this list, i've been able to tune
64-bit jaunty to run quite stably with low latency. i'll outline that
experience in more detail below. unfortunately i decided to try 32-bit for
various reasons with the same environment jack crashes every few minutes.
the kernel from ubuntu studio dev ppa solves that but introduces an annoying
keyboard bug.
fyi trying jackdmp always resulted in decreased stability for me.
under the following environment i was able to get my FA-101 running with 128
buffers and 3 periods (8.7ms latency), no xruns and no crashes:
* 64-bit jaunty
* jaunty -rt kernel
* jaunty jackd 0.116.1
* custom-built ffado 2.0 rc2 - didn't actually experiment much with rc1.
if you'd like i can upload my rc2 debs to a ppa.
* blacklisted wifi drivers
* disabled CPU scaling (use performance scaling_governor), slighly
underclocked CPU, and fan at max
* configured rtirq to give only rtc and firewire interrupts real-time
priority, SCHED_OTHER for everything else
* /etc/udev/rules.d/99-raw1394.rules: KERNEL==raw1394, GROUP=disk
* tweak /etc/security/limits.conf as described in ubuntu studio
preparation
* add your user to disk and audio groups
* run jack with real-time priority 50 (anything 0 is probably fine)
* also used x-updates PPA for newer intel graphics drivers, not sure this
was consequential at all.
* disabled apparmour, pulseaudio
my /etc/default/rtirq (this really made a big difference!)
--
RTIRQ_NAME_LIST=rtc ohci1394 snd
RTIRQ_PRIO_HIGH=90
RTIRQ_PRIO_DECR=5
RTIRQ_RESET_ALL=1
RTIRQ_NON_THREADED=rtc snd
RTIRQ_HIGH_LIST=softirq-timer softirq-hrtimer softirq-tasklet
my /etc/modules
--
rtc
raw1394
On Sat, Jul 18, 2009 at 8:49 PM, Gerhard Lang lang.gerh...@gmail.comwrote:
-ubuntu version, 32 or 64bit, rt-kernel, ffado/jack versions,
wine/wineasio versions...?
In the last weeks I was impatiently testing front-ends - karmic 64bit,
2.6.29.6-1-rt, self-compiled 2.6.29rt's, ffado from svn, jack 1.9.3
from svn, wine asio 64bit from svn. Sometimes got nice performance, but
allways very unstable, lots of crashes, freezings, only randomly
success. Wasn't able to figure out reproducable circumstances, in google
I found a disorder of contributions from 2002 to 2008, so I lost track
and disconsolately didn't report bugs.
My hardware: Nexoc/Clevo-Notebook intel-core-duo-t5...@2ghz 4GRAM with
all standard Intel-board/chips exc. onboard VIA vt6306 Fire2 IEEE 1394
controller. EmuX2x2midi-usb. Edirol-FA101.
Now I have to do straight audio production and some live-performance. I
want to demonstrate efficient linux-audio without tinkering around
onstage. Besides a reliable basic ffado/jack installation I need a full
performant wine/vst-host-gui, in which I can edit all parameters on the
fly. Must not be reaper, which becomes fat and eats too much resources.
For the rest I am contented with genuine linux ardour, hydrogen,
rakarrack etc...
I'll have to downgrade i.e. reinstall former version. I'm no coder but
group, priority, raw1394, rights , dev, udev, security management issues
are under control.
Any experience-based recommendation will be appreciated
Gerhard
--
Ubuntu-Studio-users mailing list
Ubuntu-Studio-users@lists.ubuntu.com
Modify settings or unsubscribe at:
https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
--
Ubuntu-Studio-users mailing list
Ubuntu-Studio-users@lists.ubuntu.com
Modify settings or unsubscribe at:
https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
