10 Jul
2010
10 Jul
'10
5:28 p.m.
I was very surprised to see Jack2 working well set to realtime + soft
mode, with a normal (non-rt) kernel, giving me 2.67 ms stated latency
without kernel crashes in Fedora 13. Anyone doing it this way? Anyone
see disadvantages? So far it's pretty gravy for me.
J.E.B.
10 Jul
10 Jul
5:35 p.m.
Hey Johnathan,
Mind expanding a bit on what soundcard your using, kernel version, jack
frames & period?
If im to guess, you're not on a firewire card, usually the -RT is really
nessiary to ensure
no XRuns..
Maybe you are though.. that's when I'd be really intrested! -Harry
PS: I'm not on Fedora at the moment, running Pure::Dyne latest stable. Very
good -RT performance
on this laptop with that kernel & firewire stack. :-)
On Sat, Jul 10, 2010 at 6:28 PM, Jonathan E. Brickman
<jeb(a)joshuacorps.org>wrote;wrote:
I was very surprised to see Jack2 working well set to
realtime + soft mode,
with a normal (non-rt) kernel, giving me 2.67 ms stated latency without
kernel crashes in Fedora 13.
7:21 p.m.
Harry, rather good guess :-) Not Firewire. AudioTrak Prodigy HD2, PCI.
It has been extremely well-behaved.
In your opinion, what is the advantage of the Firewire approach?
Cabling? Replaceability? Ease of multitrack functionality? The
Firewire daisychain capability (does it still exist)?
I just checked out the Pure::Dyne web site. Very promising and
up-to-date, not like I last saw it a while back. Questions:
1. Does it install onto hard drive reasonably easily? I noticed that
that page in the wiki isn't there yet, just a title/placeholder. Can it
do RAID-1 without terrible pain?
2. If it's designed explicitly for DVD/USB use (and it looks like it
is), is that how it's updated? In other words, can I expect to just
update my system device and it will use an existing older-version
profile reliably? This would be a very good way to keep a production
machine.
3. Does it include thorough current compilation capabilities?
J.E.B.
On Sat, 2010-07-10 at 18:35 +0100, Harry Van Haaren wrote:
Hey Johnathan,
Mind expanding a bit on what soundcard your using, kernel version,
jack frames & period?
If im to guess, you're not on a firewire card, usually the -RT is
really nessiary to ensure
no XRuns..
Maybe you are though.. that's when I'd be really intrested! -Harry
PS: I'm not on Fedora at the moment, running Pure::Dyne latest stable.
Very good -RT performance
on this laptop with that kernel & firewire stack. :-)
On Sat, Jul 10, 2010 at 6:28 PM, Jonathan E. Brickman
<jeb(a)joshuacorps.org> wrote:
I was very surprised to see Jack2 working well set to realtime
+ soft mode, with a normal (non-rt) kernel, giving me 2.67 ms
stated latency without kernel crashes in Fedora 13.
9:16 p.m.
Hi!
Advantages of firewire approach:
1. Bus design. Internally, the firewire chip doesnt have to ask the CPU to
copy data
to its port, it just does it, while USB devices use the CPU for this task.
2. On cheap laptops (and unfortunat others) the IRQ's between USB &
something else
collide. This means worse performance. (I'm aware that Firewire IRQ's can
collide too,
but I've never seen that phenomena before.)
3. Firewire daisy chaining does still exist, at least for the Echo Audiofire
devices that I have.
4. I run a laptop (so PCI / PCI-E and a lot of other options are out. )
5. From my experiences, Firewire devices seem to be more geared towards
professional use,
while USB targets the "pro-sumer" market. (No flame bait intended here..)
I like the Pure::Dyne, its always done well on my laptop. I've Dyne::Bolic
before Pure::Dyne was
released, and I've been keeping a close eye on AV Linux too.. Between them
I've kept my production
system installed (Pure Dyne), and a range of "testing" partitions with
alternatives for Video / Blender work.
Installing Pure::Dyne is no problem, there's an GUI installer on the Desktop
IIRC.
I'd run it live first, just to check it out to be honest. Not sure about
RAID, never needed it.
Your question 2 has me confuzed I'm afraid, you're asking how its updated?
The same
as any other system... a packet manager. Or do you mean how does the LiveCD
get updated?
I think new ISO's are generated every once in a while... not sure. Check
out RemasterSys if your
hoping to update your Live system and keep it on a CD. (AV Linux is a debian
based RemasterSys distro).
I'm not sure if Pure comes with development tools... It does come with PD,
Processing, Arduino software
etc, but I dont think it has g++, gdb, svn or those installed. That said,
its all a "sudo apt-get install <x>" away.
If you decide to try it, hope it goes well. Your mileage may vary ;-)
Cheers, -Harry
On Sat, Jul 10, 2010 at 8:20 PM, Jonathan E. Brickman
<jeb(a)joshuacorps.org>wrote;wrote:
Harry, rather good guess :-) Not Firewire. AudioTrak
Prodigy HD2, PCI.
It has been extremely well-behaved.
In your opinion, what is the advantage of the Firewire approach?
Cabling? Replaceability? Ease of multitrack functionality? The
Firewire daisychain capability (does it still exist)?
I just checked out the Pure::Dyne web site. Very promising and
up-to-date, not like I last saw it a while back. Questions:
1. Does it install onto hard drive reasonably easily? I noticed that
that page in the wiki isn't there yet, just a title/placeholder. Can it
do RAID-1 without terrible pain?
2. If it's designed explicitly for DVD/USB use (and it looks like it
is), is that how it's updated? In other words, can I expect to just
update my system device and it will use an existing older-version
profile reliably? This would be a very good way to keep a production
machine.
3. Does it include thorough current compilation capabilities?
J.E.B.
On Sat, 2010-07-10 at 18:35 +0100, Harry Van Haaren wrote:
Hey Johnathan,
Mind expanding a bit on what soundcard your using, kernel version,
jack frames & period?
If im to guess, you're not on a firewire card, usually the -RT is
really nessiary to ensure
no XRuns..
Maybe you are though.. that's when I'd be really intrested! -Harry
PS: I'm not on Fedora at the moment, running Pure::Dyne latest stable.
Very good -RT performance
on this laptop with that kernel & firewire stack. :-)
On Sat, Jul 10, 2010 at 6:28 PM, Jonathan E. Brickman
<jeb(a)joshuacorps.org> wrote:
I was very surprised to see Jack2 working well set to realtime
+ soft mode, with a normal (non-rt) kernel, giving me 2.67 ms
stated latency without kernel crashes in Fedora 13.
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user
9:31 p.m.
On 07/10/2010 11:16 PM, Harry Van Haaren wrote:
Hi!
Advantages of firewire approach:
1. Bus design. Internally, the firewire chip doesnt have to ask the CPU to
copy data
to its port, it just does it, while USB devices use the CPU for this task.
2. On cheap laptops (and unfortunat others) the IRQ's between USB&
something else
collide. This means worse performance. (I'm aware that Firewire IRQ's can
collide too,
but I've never seen that phenomena before.)
On my notebook I can' t get Firewire to work without a realtime kernel
and rtirq-init because the Firewire controller shares an IRQ with a load
of other things:
jeremy@soushi:~$ cat /proc/interrupts | grep 1394
16: 119 1453949 IO-APIC-fasteoi uhci_hcd:usb3, ohci1394,
eth7, mmc0, jmb38x_ms:slot0, nvidia
Tomtidom, that's an USB port, a Firewire controller, a WiFi controller,
a cardreader and a GPU. It's probably the most crowded IRQ that ever
existed on the face of the earth ;)
Best,
Jeremy
11:18 p.m.
Harry Van Haaren wrote:
Hi!
Advantages of firewire approach:
1. Bus design. Internally, the firewire chip doesnt have to ask the CPU
to copy data
to its port, it just does it, while USB devices use the CPU for this task.
2. On cheap laptops (and unfortunat others) the IRQ's between USB &
something else
collide. This means worse performance. (I'm aware that Firewire IRQ's
can collide too,
but I've never seen that phenomena before.)
3. Firewire daisy chaining does still exist, at least for the Echo
Audiofire devices that I have.
4. I run a laptop (so PCI / PCI-E and a lot of other options are out. )
5. From my experiences, Firewire devices seem to be more geared towards
professional use,
while USB targets the "pro-sumer" market. (No flame bait intended here..)
I like the Pure::Dyne, its always done well on my laptop.
I like Pure:Dyne, too. Also ArtistX 0.6 and 0.7 (have that on my
synthesizer/effects laptop, an old Toshiba with 2.8GHz Celeron, 768MB
RAM). Works nicely with Behringer UCA-202 USB1 sound card, but I only
output sound from it.
Have made several attempts using Ubuntu 10.x and derivatives thereof.
They don't seem to like the Intel video in my two laptops (black
screen). Older Ubuntus (8.x and 9.x) and other distros don't have the
same problem.
I've Dyne::Bolic before Pure::Dyne was
released, and I've been keeping a close eye on AV Linux too.. Between
them I've kept my production
system installed (Pure Dyne), and a range of "testing" partitions with
alternatives for Video / Blender work.
Notes about AVLinux:
* 32-bit only
* For those using older hardware, it requires that the processor support
PAE (Physical Address Extension). Of my collection of machines here,
newer AMD Sempron has it, Intel Celeron doesn't.
Of course, you don't have old hardware to deal with.
--
David
gnome(a)hawaii.rr.com
authenticity, honesty, community
11:35 p.m.
On Sun, Jul 11, 2010 at 12:18 AM, david <gnome(a)hawaii.rr.com> wrote:
Of course, you don't have old hardware to deal
with.
Your right, I've a 2 year old laptop, with PAE. (I think the Celeron were
the last chip to not have PAE..)
Thanks for bringing ArtistX to my attention, I'd only tried 0.7 a couple of
years back, and it was already
outdated then! But there's a new release, (0.8 :-0 ) which is based on
Ubuntu 10 (unlucky there...).
It seems pretty promising, Ill download it over the next days, and hopefully
its all good!
KXStudio is another intresting (Buntu based) distro... Its shipping with
LADISH, JACK2, ArdourVST, QTracktorVST etc
Really up to date, there's a PPA for Ardour3, Mixxx 1.8, etc
KX does focus on "visual appeal" as well as functionality. Ie: Its probably
not *the* fastest system to boot / login.
But it sure looks a lot more slick than my bare bones LXDE ;-)
Cheers, -Harry
11 Jul
11 Jul
3:41 a.m.
Harry Van Haaren wrote:
On Sun, Jul 11, 2010 at 12:18 AM, david wrote:
Of course, you don't have old hardware to deal with.
Your right, I've a 2 year old laptop, with PAE. (I think the Celeron
were the last chip to not have PAE..)
Could be. They're the last Intel chips I have here. (Well, my wife's
laptop has a Core2Duo in it, but she doesn't do music stuff with it.
Thanks for bringing ArtistX to my attention, I'd
only tried 0.7 a couple
of years back, and it was already
outdated then! But there's a new release, (0.8 :-0 ) which is based on
Ubuntu 10 (unlucky there...).
Yah, I'm downloading it now, will see if perhaps this "R2" (second
release version, I guess) has fixed it.
It seems pretty promising, Ill download it over the
next days, and
hopefully its all good!
KXStudio is another intresting (Buntu based) distro... Its shipping with
LADISH, JACK2, ArdourVST, QTracktorVST etc
I downloaded KXStudio. It's based on KUbuntu 10. It hangs on my laptops
with a black screen.
KDE4 is a major resource hog, not something I'd recommend for an
audio-focussed system.
Really up to date, there's a PPA for Ardour3,
Mixxx 1.8, etc
KX does focus on "visual appeal" as well as functionality. Ie: Its
probably not *the* fastest system to boot / login.
Or do things with. The more "visual appeal" there is, the more the
system has to be doing intense things with your video. That can be a big
problem if video and audio are sharing interrupts!
But it sure looks a lot more slick than my bare bones
LXDE ;-)
What a waste of resources. I like LXDE and even Fluxbox instead for
audio systems. I'd rather have my processor making sounds than doing
some silly menu fading effect. ;-)
--
David
gnome(a)hawaii.rr.com
authenticity, honesty, community
2:09 p.m.
Any other advantage for KXStudio over Kubuntu? Do you can user all Ubuntu
packages with kxstudio? Is it come already with rt-kernel and ffado drivers?
2010/7/10 Harry Van Haaren <harryhaaren(a)gmail.com>
On Sun, Jul 11, 2010 at 12:18 AM, david <gnome(a)hawaii.rr.com> wrote:
Of course, you don't have old hardware to
deal with.
Your right, I've a 2 year old laptop, with PAE. (I think the Celeron were
the last chip to not have PAE..)
Thanks for bringing ArtistX to my attention, I'd only tried 0.7 a couple of
years back, and it was already
outdated then! But there's a new release, (0.8 :-0 ) which is based on
Ubuntu 10 (unlucky there...).
It seems pretty promising, Ill download it over the next days, and
hopefully its all good!
KXStudio is another intresting (Buntu based) distro... Its shipping with
LADISH, JACK2, ArdourVST, QTracktorVST etc
Really up to date, there's a PPA for Ardour3, Mixxx 1.8, etc
KX does focus on "visual appeal" as well as functionality. Ie: Its probably
not *the* fastest system to boot / login.
But it sure looks a lot more slick than my bare bones LXDE ;-)
Cheers, -Harry
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user
2:19 p.m.
On Sun, Jul 11, 2010 at 3:09 PM, Bernardo Barros
<bernardobarros2(a)gmail.com>wrote;wrote:
Any other advantage for KXStudio over Kubuntu? Do you
can user all Ubuntu
packages with kxstudio? Is it come already with rt-kernel and ffado drivers?
Yes, it comes with a FFADO i think.. the RT kernel im not too sure on. I
only used it for a little
while, and went back to my Pure::Dyne.
I'd download the ISO, and test it out LiveDVD mode, See how you like it..
-Harry
10 Jul
10 Jul
11:52 p.m.
On 11.07.2010 01:18, david wrote:
I like Pure:Dyne, too. Also ArtistX 0.6 and 0.7 (have that on my
synthesizer/effects laptop, an old Toshiba with 2.8GHz Celeron, 768MB
RAM). Works nicely with Behringer UCA-202 USB1 sound card, but I only
output sound from it.
Just one question while you're talking about distros. I would like to
use my old Asus EEE as a synth/sampler/looper/... Is there any
multimedia distro that is not based on Ubuntu? Because of EEE's limited
resources I thought about putting Arch on it and then customizing it to
my needs, but currently I don't have much time for that so a lightweight
audio distro would be great.
Cheers!
Igor
11 Jul
11 Jul
12:31 a.m.
On Sun, 2010-07-11 at 01:52 +0200, Igor Brkic wrote:
On 11.07.2010 01:18, david wrote:
AVLinux is based on Debian, not Ubuntu, and it focusses on being
lightweight. Dyne::bolic is that way also.
J.E.B.
I like Pure:Dyne, too. Also ArtistX 0.6 and 0.7 (have that on my
synthesizer/effects laptop, an old Toshiba with 2.8GHz Celeron, 768MB
RAM). Works nicely with Behringer UCA-202 USB1 sound card, but I only
output sound from it.
Just one question while you're talking about distros. I would like to
use my old Asus EEE as a synth/sampler/looper/... Is there any
multimedia distro that is not based on Ubuntu? Because of EEE's limited
resources I thought about putting Arch on it and then customizing it to
my needs, but currently I don't have much time for that so a lightweight
audio distro would be great.
Cheers!
Igor
3:46 a.m.
Jonathan E. Brickman wrote:
On Sun, 2010-07-11 at 01:52 +0200, Igor Brkic wrote:
Ubuntu in turn is based on Debian.
--
David
gnome(a)hawaii.rr.com
authenticity, honesty, community
On 11.07.2010 01:18, david wrote:
AVLinux is based on Debian, not Ubuntu, and it focusses on being
lightweight. Dyne::bolic is that way also. I like Pure:Dyne, too. Also ArtistX 0.6 and 0.7
(have that on my
synthesizer/effects laptop, an old Toshiba with 2.8GHz Celeron, 768MB
RAM). Works nicely with Behringer UCA-202 USB1 sound card, but I only
output sound from it.
Just one question while you're talking about distros. I would like to
use my old Asus EEE as a synth/sampler/looper/... Is there any
multimedia distro that is not based on Ubuntu? Because of EEE's limited
resources I thought about putting Arch on it and then customizing it to
my needs, but currently I don't have much time for that so a lightweight
audio distro would be great.
12 Jul
12 Jul
11:59 a.m.
On 11.07.2010 02:31, Jonathan E. Brickman wrote:
AVLinux is based on Debian, not Ubuntu, and it focusses on being
lightweight. Dyne::bolic is that way also.
J.E.B.
I've tried Dyne::bolic few years ago and it was great. Only, IIRC, at
that time it didn't have any kind of package management. I'll try it again.
Cheers!
Igor
12:05 p.m.
On Mon, Jul 12, 2010 at 8:57 AM, Igor Brkic <igor(a)hyperglitch.com> wrote:
I've tried Dyne::bolic few years ago and it was
great. Only, IIRC, at that
time it didn't have any kind of package management. I'll try it again.
Dyne:Bolic hasn't been updated since 2007. I wouldn't got there if your
looking for bleeding edge ;-)
Pure::Dyne is the up-to-date Dyne:Bolic in my eyes.. (i might get flamed for
that..)
-Harry
PS: Pure::Dyne does have -devel stuff installed as default (from thier
site):
devel: gcc, make, patchutils, subversion, mercurial, bzr, emacs-goodies-el,
java jdk, python, ...
11 Jul
11 Jul
3:45 a.m.
Igor Brkic wrote:
On 11.07.2010 01:18, david wrote:
Someone on the list uses an Asus EEE for his live performances. Perhaps
he has advice?
I think a couple of general purpose distros now offer Asus-EEE-optimized
set ups, might be a good starting point?
--
David
gnome(a)hawaii.rr.com
authenticity, honesty, community
I like Pure:Dyne, too. Also ArtistX 0.6 and 0.7 (have that on my
synthesizer/effects laptop, an old Toshiba with 2.8GHz Celeron, 768MB
RAM). Works nicely with Behringer UCA-202 USB1 sound card, but I only
output sound from it.
Just one question while you're talking about distros. I would like to
use my old Asus EEE as a synth/sampler/looper/... Is there any
multimedia distro that is not based on Ubuntu? Because of EEE's limited
resources I thought about putting Arch on it and then customizing it to
my needs, but currently I don't have much time for that so a lightweight
audio distro would be great. 
6:41 p.m.
Hi,
On Saturday 10 July 2010 23:16:40 Harry Van Haaren wrote:
Advantages of firewire approach:
1. Bus design. Internally, the firewire chip doesnt have to ask the CPU to
copy data
to its port, it just does it, while USB devices use the CPU for this task.
2. On cheap laptops (and unfortunat others) the IRQ's between USB &
something else
collide. This means worse performance. (I'm aware that Firewire IRQ's can
collide too,
but I've never seen that phenomena before.)
3. Firewire daisy chaining does still exist, at least for the Echo
Audiofire devices that I have.
4. I run a laptop (so PCI / PCI-E and a lot of other options are out. )
5. From my experiences, Firewire devices seem to be more geared towards
professional use,
while USB targets the "pro-sumer" market. (No flame bait intended here..)
Here are more firewire-advantages:
6. Synchronous transport for streaming data. Also streaming stuff is initiated
by the device, not by the cpu.
6.5 This results in a bus-wide clock to sync devices which enables the daisy-
chain usage of multiple devices.
7. Guaranteed bandwidth and latency (up to a certain maximum), devices will
not steal each others time as with usb.
The IRQ-problems applies to all pci, usb and firewire the same. If the
interrupts collide and you can't change them, it will not work...
Have fun,
Arnold
12 Jul
12 Jul
5:34 a.m.
Arnold Krille wrote:
Hi,
On Saturday 10 July 2010 23:16:40 Harry Van Haaren wrote:
On either of my laptops, if I plug my UCA-202 USB1 card into its own
USB2 port, I get smooth audio performance (24-bit/48kHz).
If I try to daisy chain it through my external USB2 hub, I get choppy
audio (and a noticeable hum, that could simply be the hub's ungrounded
external power supply or poor shielding).
My church uses an Echo AudioFire 12 to record our services. We used to
record 12-tracks 24-bit/48kHz to an old IBM Thinkpad via a Firewire
card. It recorded skip free on old equipment that could only do Firewire
400 speeds.
So even though NOMINALLY the USB port is FASTER - Firewire gives better
sustained throughput. That's why Firewire is still the preferred method
for connecting pro digital video - sustained throughput.
As long as any device on the USB bus (like a mouse or computer keyboard)
can interrupt another device's data transfer, I don't think USB is ready
for serious audio work even if your PC hardware supports enough USB host
controllers to give your audio device its own USB port.
--
David
gnome(a)hawaii.rr.com
authenticity, honesty, community
Advantages of firewire approach:
1. Bus design. Internally, the firewire chip doesnt have to ask the CPU to
copy data
to its port, it just does it, while USB devices use the CPU for this task.
2. On cheap laptops (and unfortunat others) the IRQ's between USB &
something else
collide. This means worse performance. (I'm aware that Firewire IRQ's can
collide too,
but I've never seen that phenomena before.)
3. Firewire daisy chaining does still exist, at least for the Echo
Audiofire devices that I have.
4. I run a laptop (so PCI / PCI-E and a lot of other options are out. )
5. From my experiences, Firewire devices seem to be more geared towards
professional use,
while USB targets the "pro-sumer" market. (No flame bait intended here..)
Here are more firewire-advantages:
6. Synchronous transport for streaming data. Also streaming stuff is initiated
by the device, not by the cpu.
6.5 This results in a bus-wide clock to sync devices which enables the daisy-
chain usage of multiple devices.
7. Guaranteed bandwidth and latency (up to a certain maximum), devices will
not steal each others time as with usb. 
10 Jul
10 Jul
8:04 p.m.
On Sat, Jul 10, 2010 at 12:28:25PM -0500, Jonathan E. Brickman wrote:
I was very surprised to see Jack2 working well set to
realtime +
soft mode, with a normal (non-rt) kernel, giving me 2.67 ms stated
latency without kernel crashes in Fedora 13. Anyone doing it this
way? Anyone see disadvantages? So far it's pretty gravy for me.
I've been using unpatched (for RT) kernels (2.6.32 and 2.6.33) for
some time on a number of audio systems, and they all work very well
with period sizes of 256 and 128 (didn't test any lower ones).
Seems like unpatched kernels are performing quite well these days.
The only problem I've had was with the 'nouveau' video module for
Nvidia cards - on two systems it made even a period size of 1024
unusable (and I had to replace it with the older nv) while on the
others there were no problems at all.
Ciao,
--
Je veux que la mort me trouve plantant mes choux, mais
nonchalant d’elle, et encore plus de mon jardin imparfait.
(Michel de Montaigne)
8:24 p.m.
Surprisingly enough, I am using a period of 64. Apparently kernel
development is going strong :-)
J.E.B.
On Sat, 2010-07-10 at 22:04 +0200, fons(a)kokkinizita.net wrote:
On Sat, Jul 10, 2010 at 12:28:25PM -0500, Jonathan E.
Brickman wrote:
I was very surprised to see Jack2 working well
set to realtime +
soft mode, with a normal (non-rt) kernel, giving me 2.67 ms stated
latency without kernel crashes in Fedora 13. Anyone doing it this
way? Anyone see disadvantages? So far it's pretty gravy for me.
I've been using unpatched (for RT) kernels (2.6.32 and 2.6.33) for
some time on a number of audio systems, and they all work very well
with period sizes of 256 and 128 (didn't test any lower ones).
Seems like unpatched kernels are performing quite well these days.
The only problem I've had was with the 'nouveau' video module for
Nvidia cards - on two systems it made even a period size of 1024
unusable (and I had to replace it with the older nv) while on the
others there were no problems at all.
Ciao,
11 Jul
11 Jul
9:34 a.m.
Excerpts from Jonathan E. Brickman's message of 2010-07-10 19:28:25 +0200:
I was very surprised to see Jack2 working well set to realtime + soft
mode, with a normal (non-rt) kernel, giving me 2.67 ms stated latency
without kernel crashes in Fedora 13. Anyone doing it this way? Anyone
see disadvantages? So far it's pretty gravy for me.
J.E.B.
Isn't softmode the mode that doesn't report xruns?
-s, --softmode Soft-mode, no xrun handling (default: false)
What this means exactly I don't know, but I doubt that softmode is
something that should be used unless there's a good reason for it.
--
Regards,
Philipp
--
"Wir stehen selbst enttäuscht und sehn betroffen / Den Vorhang zu und alle Fragen
offen." Bertolt Brecht, Der gute Mensch von Sezuan
2:29 p.m.
On 11/07/2010, Philipp Überbacher <hollunder(a)lavabit.com> wrote:
Excerpts from Jonathan E. Brickman's message of
2010-07-10 19:28:25 +0200:
Yep, obviously has little to do with performance, if that's what the
poster was hinting at. I use it so that my tray icon remains green
throughout despite 1 or 2 xruns.
--
GPG/PGP ID: B42DDCAD
I was very surprised to see Jack2 working well set to realtime + soft
mode, with a normal (non-rt) kernel, giving me 2.67 ms stated latency
without kernel crashes in Fedora 13. Anyone doing it this way? Anyone
see disadvantages? So far it's pretty gravy for me.
J.E.B.
Isn't softmode the mode that doesn't report xruns?
-s, --softmode Soft-mode, no xrun handling (default: false)
What this means exactly I don't know, but I doubt that softmode is
something that should be used unless there's a good reason for it. 
4:49 p.m.
On Sat, 2010-07-10 at 12:28 -0500, Jonathan E. Brickman wrote:
I was very surprised to see Jack2 working well set to
realtime + soft
mode, with a normal (non-rt) kernel, giving me 2.67 ms stated latency
without kernel crashes in Fedora 13. Anyone doing it this way? Anyone
see disadvantages? So far it's pretty gravy for me.
Current vanilla kernels are getting to be pretty good for audio use. Not
as good as rt patched but pretty good. If it works for you then no
problem.
BTW, were you reviewing your logs and the output of dmesg for abnormal
kernel messages before using fc12/13? I ask that because abrt (a bug
report tool) is now flagging kernel messages as kernel "crashes" which
might had been happening all along.
Some kernel "crashes" have side effects and you will notice (for example
your computer hangs and that's it :-)
Others are kernel bugs that should not happen but are happening and are
now being reported as "crashes" (and should be fixed), but in my
experience do not have side effects - right now, for example, I have
kernel "crashes" every time I cycle my laptop through a suspend/resume
cycle (2.6.33.6 rt23 on fc12) but nothing has broken so far because of
that.
-- Fernando
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days inactive
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linux-audio-user@lists.linuxaudio.org
22 comments
11 participants
participants (11)
-
Arnold Krille -
Bernardo Barros -
david -
Fernando Lopez-Lezcano -
fons＠kokkinizita.net -
Harry Van Haaren -
Igor Brkic -
Jeremy Jongepier -
Jonathan E. Brickman -
Philipp Überbacher -
Ray Rashif