Re: [LAU] ubuntu realtime.

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To: <linux-audio-user@...>
Date: Thursday, May 28, 2009 - 6:00 pm

Tom Dunstan kirjoitti:

> Asmo, you seem to be quite happy... any ideas?

Yes I am. Here is my laptop with Echo AudioFire4.

http://www.arkki.info/howto/Ubuntu_Studio/904_ffado_02.png

This time latency is 8 ms. Where, when and why someone needs something
like 3 ms?

I follow this statement here: "Apple considers everything < 10ms as
'good enough'. And the audio pro's seem to be very happy with Apple."

http://subversion.ffado.org/wiki/SomeNotesOnLatency

----
1. Laptop is Intel/ATI based - Acer TM 6592.

studio@ubuntu-studio:~$ lspci
00:19.0 Ethernet controller: Intel Corporation 82566MM Gigabit Network
Connection (rev 03)
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio
Controller (rev 03)
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon HD 2400 XT
06:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or
AGN [Kedron] Network Connection (rev 61)
0a:04.0 FireWire (IEEE 1394): O2 Micro, Inc. Firewire (IEEE 1394) (rev 02)
0a:07.0 FireWire (IEEE 1394): Texas Instruments TSB43AB23
IEEE-1394a-2000 Controller (PHY/Link)
studio@ubuntu-studio:~$

2. I can use wlan with RT kernel (screenshot).

3. I have of course tweaked system, that takes few lines in few files.

studio@ubuntu-studio:~$ cat /etc/security/limits.conf
@audio - memlock unlimited
@audio - nice -19
@audio - rtprio 99
studio@ubuntu-studio:~$

studio@ubuntu-studio:~$ cat /etc/group | grep audio
audio:x:29:pulse,studio
studio@ubuntu-studio:~$

studio@ubuntu-studio:~$ cat /etc/modules
loop
lp
rtc
snd-seq
raw1394
video1394
studio@ubuntu-studio:~$

studio@ubuntu-studio:~$ lsmod | grep 1394
video1394 26216 0
raw1394 35976 28
ohci1394 42548 15 video1394
ieee1394 110176 3 video1394,raw1394,ohci1394
studio@ubuntu-studio:~$

studio@ubuntu-studio:~$ ls -al /dev/raw1394
crwxrwxrwx 1 root root 171, 0 2009-05-28 17:10 /dev/raw1394
studio@ubuntu-studio:~$
----

On the desktop machine I use M-Audio Delta 66, I have both - 8.04 x86_64
and 9.04 x86_64.

Here is my howto in finnish for Ubuntu Studio 8.04 x86_64.

http://wiki.ubuntu-fi.org/Ubuntu_Studio
----

Btw - I used that Ubuntu Studio 9.04 x86_64 (RT kernel) on that laptop
as a Flumotion server over six hours at my daughter's school - just
like year ago.

http://www.arkki.info/howto/Flumotion/Flumotion_02.png

http://wiki.ubuntu-fi.org/Flumotion
----

So to me Ubuntu Studio just works. Maybe I'm just lucky with hardware...
or maybe I have done my homework for hardware...
----

Best Regards Asmo Koskinen.
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Messages in current thread:
Re: [LAU] ubuntu realtime., Thomas Kerstgens, (Wed May 27, 8:25 am)
Re: [LAU] ubuntu realtime., Marcel Marti, (Wed May 27, 6:50 pm)
Re: [LAU] ubuntu realtime., Atte André Jensen, (Fri May 29, 4:21 pm)
Re: [LAU] ubuntu realtime., Mark Knecht, (Fri May 29, 5:23 pm)
Re: [LAU] ubuntu realtime., Marcel Marti, (Fri May 29, 6:44 pm)
Re: [LAU] ubuntu realtime., Dave Phillips, (Sat May 30, 12:15 pm)
Re: [LAU] ubuntu realtime., Brent Busby, (Wed Jun 10, 8:14 pm)
Re: [LAU] ubuntu realtime., Bill Allen, (Mon Jun 1, 1:33 am)
Re: [LAU] ubuntu realtime., Thomas Fisher, (Mon Jun 1, 1:25 am)
Re: [LAU] ubuntu realtime., Asmo Koskinen, (Mon Jun 1, 6:54 am)
Re: [LAU] ubuntu realtime., Asmo Koskinen, (Sat May 30, 1:13 pm)
Re: [LAU] ubuntu realtime., Asmo Koskinen, (Sat May 30, 12:52 pm)
Re: [LAU] ubuntu realtime., Ray Rashif, (Fri May 29, 5:07 pm)
Re: [LAU] ubuntu realtime., Atte André Jensen, (Fri May 29, 5:21 pm)
Re: [LAU] ubuntu realtime., Raffaele Morelli, (Thu May 28, 7:43 am)
Re: [LAU] ubuntu realtime., Tom Dunstan, (Thu May 28, 9:23 am)
Re: [LAU] ubuntu realtime., Gerhard Zintel, (Thu May 28, 8:55 pm)
Re: [LAU] ubuntu realtime., Asmo Koskinen, (Thu May 28, 6:00 pm)
Re: [LAU] ubuntu realtime., Scott, (Sat May 30, 6:20 pm)
Re: [LAU] ubuntu realtime., Raffaele Morelli, (Fri May 29, 7:24 am)
Re: [LAU] ubuntu realtime., Brent Busby, (Tue Jun 9, 12:58 am)
Re: [LAU] ubuntu realtime., Asmo Koskinen, (Thu May 28, 6:29 pm)
Re: [LAU] ubuntu realtime., Asmo Koskinen, (Thu May 28, 6:09 pm)
Re: [LAU] ubuntu realtime., Asmo Koskinen, (Wed May 27, 7:58 pm)