[SOLVED?] Re: Horrific jackd xrun behaviour after upgrade from US 10.04 to 12.04 (Re: R: Audio issues in 10.04)

2012-09-18 Thread Thomas Orgis 
Am Tue, 18 Sep 2012 12:50:32 +0200
schrieb Thomas Orgis : 

> And, having read up a bit ... AHCI seems to be known to cause audio
> issues

I must admit that the box seems to be stable now. And it is always
using AHCI enforced via kernel, regardless of BIOS setting. So that is
ruled out as source of the issues. The onboard soundchip performance is
still not stellar, but it is able to do 2x1024 in an apparently stable
manner. What matters, is the Edirol FA-101 on Firewire and there, I can
happily record with 3x64 if I really want to. My standard setup of 3x512
periods was idling around (jack and meterbridge running) over the whole
day and did not experience a single xrun.

I still added the rtc setting to rtirq, which didn't change anything I
could perceive. I also swapped the firewire card back into its previous
slot. No difference, still fine.

I have to conclude that this really is about either a BIOS setting (I
didn't do that much ... could disabling the internal audio chip trip
things up?!) that got reset when I took out the battery or that indeed,
the flaky power train triggered unstable behaviour of the machine;
which would confoundedly confuse me as I would expect a more drastic
failure mode.

Thanks for jumping to help me about this ... I'll keep an eye on this
box and report if I find a definite clue. For now, I'll try to just use
it, not waste time breaking the setup again. I hope you can understand
that;-)


Alrighty then,

Thomas


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Re: Horrific jackd xrun behaviour after upgrade from US 10.04 to 12.04 (Re: R: Audio issues in 10.04)

2012-09-18 Thread Thomas Orgis 
Am Tue, 18 Sep 2012 12:37:21 +0200
schrieb Ralf Mardorf : 

> > Change the config to
> > RTIRQ_NAME_LIST="rtc [and add anything as it was before, excepted of a 
> > second rtc entry]"
> 
> PS: After editing the config stop and start might not do the job and a
> reboot could be required

No biggie ... I'll bear with some reboots when I get the thing stable
afterwards. As for rtc being first in the list: If that is necessary (I
could imagine that it is), I wonder why that is not default on
UbuntuStudio (I remember the update modifying that config anyway).

And, having read up a bit ... AHCI seems to be known to cause audio
issues, also on Windows machines (where people endure greate pain to
switch between AHCI and IDE mode ... registry hacking, or even
reinstall ... I didn't have to do a thing with Linux and I don't see
why I should).

Is this a consensus here: If building a DAW, stay away from AHCI?
Though, I think that I also had it enabled in 10.04 (on another
mainboard, though); that could be a regression in the kernel behaviour,
which would be depressing (I'm getting old, as I see lots of regressing
with Linux in general, especially considering reliability).


Alrighty then,

Thomas


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Re: Horrific jackd xrun behaviour after upgrade from US 10.04 to 12.04 (Re: R: Audio issues in 10.04)

2012-09-18 Thread Ralf Mardorf 

> I'm short in time and can't read your email right now, so I only take a
> look at the output of rtirq status.
> Usually you can't do anything against the shared IRQ, however it's ok,
> since firewire and snd_hda are head of the IRQs. But the first IRQ,
> before firewire has to be the timer rtc0.
> 
> Change the config to
> RTIRQ_NAME_LIST="rtc [and add anything as it was before, excepted of a second 
> rtc entry]"

PS: After editing the config stop and start might not do the job and a
reboot could be required, restart usually won't work too, perhaps reset
and force-reload will work. However, a reboot is safe.



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Re: Horrific jackd xrun behaviour after upgrade from US 10.04 to 12.04 (Re: R: Audio issues in 10.04)

2012-09-18 Thread Ralf Mardorf 
On Tue, 2012-09-18 at 11:39 +0200, Thomas Orgis wrote:
> rtirq:
> 
>   PID CLS RTPRIO  NI PRI %CPU STAT COMMAND  
>   302 FF  90   - 130  0.6 Sirq/18-firewire  
>   994 FF  83   - 123  0.0 Sirq/16-snd_hda_  
>84 FF  80   - 120  0.0 Sirq/17-ehci_hcd  
>88 FF  80   - 120  0.0 Sirq/16-ohci_hcd  
>86 FF  79   - 119  0.0 Sirq/19-ehci_hcd  
>90 FF  79   - 119  0.0 Sirq/16-ohci_hcd  
>99 FF  75   - 115  0.0 Sirq/1-i8042  
>98 FF  74   - 114  0.1 Sirq/12-i8042 
>23 FF  50   -  90  0.0 Sirq/9-acpi   
>73 FF  50   -  90  0.4 Sirq/22-ahci  
>92 FF  50   -  90  0.1 Sirq/18-ohci_hcd  
>94 FF  50   -  90  0.1 Sirq/18-ohci_hcd  
>96 FF  50   -  90  0.1 Sirq/18-ohci_hcd  
>   100 FF  50   -  90  0.0 Sirq/8-rtc0   
>   287 FF  50   -  90  0.0 Sirq/14-pata_ati  
>   288 FF  50   -  90  0.0 Sirq/15-pata_ati  
>   295 FF  50   -  90  0.1 Sirq/18-radeon
>   965 FF  50   -  90  0.0 Sirq/7-parport0   
>  1212 FF  50   -  90  0.0 Sirq/42-eth3  
> 3 TS   -   0  19  1.0 Rksoftirqd/0  
> 9 TS   -   0  19  1.0 Sksoftirqd/1  
>13 TS   -   0  19  1.0 Sksoftirqd/2

I'm short in time and can't read your email right now, so I only take a
look at the output of rtirq status.
Usually you can't do anything against the shared IRQ, however it's ok,
since firewire and snd_hda are head of the IRQs. But the first IRQ,
before firewire has to be the timer rtc0.

Change the config to
RTIRQ_NAME_LIST="rtc [and add anything as it was before, excepted of a second 
rtc entry]"

Hth,
Ralf


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Horrific jackd xrun behaviour after upgrade from US 10.04 to 12.04 (Re: R: Audio issues in 10.04)

2012-09-18 Thread Thomas Orgis 
Am Mon, 17 Sep 2012 15:30:49 +0200
schrieb Thomas Orgis : 

> > Please post the output of
> > $ /etc/init.d/rtirq status
> 
> Will try to get to that tonight.

Well ... this is interesting. I tried AVLinux and this also showed
massive xruns, with the added twist of ffado giving up on the device
after some time. I then thought that maybe swapping the firewire card
to another slot might help. It shared IRQ with some USB ports. I shoved
it into the x16 slot (using onboard graphics).

Now, would I have been properly awake at that time, I'd have thought
that the generally abysmal performance cannot have something to do with
the firewire card, as it also shows for internal audio and a USB card.
But, perhaps it was a step towards the final goal.

Thing is, the machine did not want to start after swapping the firewire
card. Pulling the card out, waiting, connecting/disconnecting power ...
and the machine boots again. To shorten it a bit: I must have had
something funky with the power connection to the card. On the same wire
branch s a SATA power adapter for the 3rd hard disk and I suspect it
having had some bad insulation, causing flaky current / shorting out.
That would explain the box dying on moving said branch about a bit, and
some protection circuit preventing powering on again (for some time).

I managed to get the thing running again after adding insulation to the
supposedly faulty adapter, and what might play a part: The BIOS got
reset. I'm with defaults there now. I'm leaving the box running for the
day with JACK on firewire under UbuntuStudio (my partial KXStudio).
During the first minutes I did not see one underrun and could record a
bit with Ardour. II faintly remember that I checked internal audio,
too, and it seemed to be fine.

So it could be down to flaky power to the firewire card / the system at
all (but how could that subtly influence the machine without killing it
outright?) or, what I think is more probable, some BIOS setting. I'll
check that later, if the test is successful. Anoter remote possibility
would be that the machine freaks out generally when the first PCIe slot
is occupied --- I'll move the firewire card back to see if that makes a
change.

Anyhow, here's the current interrupts (see how the one for firewire is
the most populated?):

   CPU0   CPU1   CPU2   
  0:124  0  1   IO-APIC-edge  timer
  1:465  0 25   IO-APIC-edge  i8042
  7:  1  0  0   IO-APIC-edge  parport0
  8:  0  0  1   IO-APIC-edge  rtc0
  9:  0  0  0   IO-APIC-fasteoi   acpi
 12:  12464 19   1858   IO-APIC-edge  i8042
 14:  0  0  0   IO-APIC-edge  pata_atiixp
 15:  0  0  0   IO-APIC-edge  pata_atiixp
 16:  0  2838   IO-APIC-fasteoi   ohci_hcd:usb3, 
ohci_hcd:usb4, snd_hda_intel
 17:  1   1682   2187   IO-APIC-fasteoi   ehci_hcd:usb1
 18:  50797  4975   IO-APIC-fasteoi   ohci_hcd:usb5, 
ohci_hcd:usb6, ohci_hcd:usb7, radeon, firewire_ohci
 19:  0  5   1747   IO-APIC-fasteoi   ehci_hcd:usb2
 22:   1442 60  15896   IO-APIC-fasteoi   ahci
 42:  0  0  0   PCI-MSI-edge  eth3
NMI:  0  0  0   Non-maskable interrupts
LOC: 215017 224583 218795   Local timer interrupts
SPU:  0  0  0   Spurious interrupts
PMI:  0  0  0   Performance monitoring interrupts
IWI:  0  0  0   IRQ work interrupts
RES:  38575  50657  61704   Rescheduling interrupts
CAL:498451613   Function call interrupts
TLB:759889843   TLB shootdowns
TRM:  0  0  0   Thermal event interrupts
THR:  0  0  0   Threshold APIC interrupts
MCE:  0  0  0   Machine check exceptions
MCP:  1  1  1   Machine check polls
ERR:  1
MIS:  0

rtirq:

  PID CLS RTPRIO  NI PRI %CPU STAT COMMAND  
  302 FF  90   - 130  0.6 Sirq/18-firewire  
  994 FF  83   - 123  0.0 Sirq/16-snd_hda_  
   84 FF  80   - 120  0.0 Sirq/17-ehci_hcd  
   88 FF  80   - 120  0.0 Sirq/16-ohci_hcd  
   86 FF  79   - 119  0.0 Sirq/19-ehci_hcd  
   90 FF  79   - 119  0.0 Sirq/16-ohci_hcd  
   99 FF  75   - 115  0.0 Sirq/1-i8042  
   98 FF  74   - 114  0.1 Sirq/12-i8042 
   23 FF  50   -  90  0.0 Sirq/9-acpi   
   73 FF  50   -  90  0.4 Sirq/22-ahci  
   92 FF  50   -  90  0.1 Sirq/18-ohci_hcd  
   94 FF  50   -  90  0.1 Sirq/18-ohci_hcd  
   96 FF  50   -  90  0.1 Sirq/18-ohci_hcd  
  100 FF  50   -  90  0.0 Sirq/8-rtc0   
  287 FF  50   -  90

Re: R: Audio issues in 10.04

2012-09-17 Thread Mike Holstein 
On Sep 17, 2012 8:13 AM, "brian.coll...@alice.it" 
wrote:
>
>
>>
>> Message: 2
>> Date: Mon, 17 Sep 2012 10:52:51 +0200
>> From: Thomas Orgis 
>> To: Ubuntu Studio Users Help and Discussion
>> 
>> Subject: Horrific jackd xrun behaviour after upgrade from US 10.04 to
>> 12.04
>> Message-ID: <20120917105251.1214a...@orgis.org>
>> Content-Type: text/plain; charset="us-ascii"
>>
>> Hi,
>>
>> the subject says it all ... I had an install of 10.04 that worked. Only
>> issue seemed to be instability when recording while a USB drive is
>> connected. So, considering that perhaps this is a sign to replace a
>> mainboard with broken onboard USB (used a PCI add-on card, which might
>> have worsened the interrupt situation), I did replace it and the
>> machine worked fine during a session.
>>
>> Now with the fully replaced hardware (Asus AM3 board with 780G chipset,
>> Athlon || X3 460, 8 Gig of Kingston DDR3 ValueRAM, 250 G Seagate SATA
>> boot, 2 WD EADS on mdraid for recordings and not to forget VIA firewire
>> on PCI-E (same card as before)) and the update to ubuntu 12.04 (yes,
>> should have tested the final hardware with 10.04 first, eh?), the
>> performance is hindered by jackd not being able to keep steady without
>> generating xruns at a some rate. Not really constant rate, though, also
>> its behaviour depends on client connections (even when just connecting
>> meterbridge, this seems to help triggering xruns a lot).
>>
>> A very interesting fact is that using 3x512 periods (or bigger) is less
>> stable even than going down to 3x32! With big periods, I get xruns
>> right away, while with the low setting, I was able to get an hour of
>> recording done, but that ended prematurely -- I _guess_ that this was
>> because of some software glitch (like xrun handling) and not due to the
>> bass player nudging the keyboard by chance. But I cannot be sure about
>> that.
>>
>> Now, I do have the lowlatency kernel already installed, also fresh
>> jack/ardour from kxstudio ... have rtirq setup updated by dpkg
>> (firewire in there instead of ohci1394). What are the ubuntu studio
>> folks' thoughts on this? Did you encounter _more_ stable jack with
>> extremely low latencies? But since it is not really stable and
>> glitch-free in any config, this interesting characteristic does not
>> help. Oh, and it happens independent of cpufreq governor. I do use XFCE
>> and the integrated radeon with open source driver.
>>
>> Any help on getting that setup stable again is appreciated ... or
>> should I simply go back to 10.04 (and hand-install current ardour/jack,
>> as I did before)? I figure that I shouldn't even need a lowlat kernel
>> for getting basic 3x512 recording work!
>>
>>
>> Alrighty then,
>>
>> Thomas.
>>
>>
>> PS: Why upgrade at all? Well, I have always a spark of hope that some
>> iteration of the GNU/Linux audio ecosystem will be really stable,
>> without random crashes of Ardour, for example. But I guess one has to
>> live with crashing multimedia apps ... not been that different during
>> my days doing video with Ulead Media Studio on Windows (and the fact
>> that version 5 was less usable than 2.5).
If I thought it was the upgrade from 10.04 to 12.04 that is the issue, I
would try a 12.04 live cd and see how it works with the usb device. I
typically use the live cd's as a tool to see hoe the hardware support is,
which is, as I see it, the issue you have. I still use ubuntustuio 10.04 in
my studio with a firewire device and it is rock solid. Tests of 12.04 and
12.10 only show improvment. i installed jack on my netbook running 12.04
and a generic kernel and JACK runs stable.

if that were my system, i would also try the internal sound card for
troubleshooting purposes. i think you'll find a scenario where with good
quality, and well supported hardware JACK will run stable, and checking in
with what version of ardour you are running and upgrading should fix any
stability issues with it.

i also have one odd tascam USB device that when running under ubuntu 10.04
actually has much worse performance with the realtime kernel. the best
support for it is with a generic kernel from the ubuntu repos.

ALSO, i use the kxstudio ppa's a lot, and quite like them, and the
developer is great. i would not suggest using KXstudio to try and add
support or increase the stability of a device that cannot be supported
well, or has misconfigured interrupts. i would use KXstudio to add newer or
different packages to ubuntu or ubuntustudio... not to magically repair an
xrun issue...

i assure you, in my test, JACK *is* quite stable, and setting up and
configuring USB devices can challenging.

>> -- next part --
>> A non-text attachment was scrubbed...
>> Name: signature.asc
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https://lists.ubuntu.com/archives/ubuntu-studio-users/attachments/20120917/8b38691f/attachment-0001.pgp
>
>>
>> --
>>
>> --
>> Ubuntu-S

R: Re: R: Audio issues in 10.04

2012-09-17 Thread brian.coll...@alice.it 
If I understand correctly, KXStudio is not a distro. You need to install a 
distro (Ubuntu Studio is a good option, but others might work, I don't know), 
and then activate the additional repositories in synaptic manager and from 
there, install the items that you want.

You might start with Ubuntu Studio 12.04 (it has long-term support and lots of 
updates). Then from there, see what else you need.
Personally, I like how KXStudio interfaces with Ubuntu Studio. Two very good 
projects, imo..

brian




Messaggio originale
Da: thomas-fo...@orgis.org
Data: 17-set-2012 15.26
A: 
Cc: "brian.coll...@alice.it"
Ogg: Re: R: Audio issues in 10.04

Am Mon, 17 Sep 2012 14:12:40 +0200 (CEST)
schrieb "brian.coll...@alice.it" : 

> Hello Thomas,
> I use KXStudio on top of UbuntuStudio, but the 12.04 version.

I think there is some misunderstanding: I don't have the issues with
10.04 but with 12.04. But thanks for the pointer to KXStudio forum ...
I got confused with all that flavouring of ubuntu. I see that I perhaps
should not blame UbuntuStudio when I have a partial mix with KXStudio
(I just treated it as PPA to get current Ardour ... every 'buntu
install I do seems to need an assortment of PPAs to make it work ...
the hell of conflicting rpm repos for RHEL gives an acknowledging wink).

So, It seems I'm half-way between two flavours of 'buntu here? You
install ubuntu ... turn it into ubuntu studio ... then into
KXStudio ... 

I guess I have to test 2, er, 3 setups before continuing to bugger either 
project

1. roll-back of KXStudio stuff to vanilla UbuntuStudio,
2. do a full install of kxstudio-desktop-xfce, kxstudio-meta-audio ...
and finally, KXStudio-kernel-realtime
3. or do a short-track and just install the KXStudio kernel, which
might be better tested with the kxstudio JACK.

I have prepared a USB drive with AVLinux 6 for comparison ... let's see
if _some_ setup works. And then, I can figure out what 'buntu or not I
need to get a working recording box.


Alrighty then,

Thomas

PS: Won't UbuntuStudio 12.04 integrate future 2.8.x Ardour releases?
It's all about bugfixes. And Ardour has lots of those. It just doesn't
feel right to work with 2.8.12 when there is 2.8.14 . Even if the new
version introduces new ones, it is one step closer to the illusive
2.8.FINAL that finally does not crash during mixing. It's a fine
tool ... it just should never crash. We should not let web browsers set
the standard for application stability:-/
But well, I guess the solution is to go KXStudio right away, which
seems to provide current versions of things.



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Re: R: Audio issues in 10.04

2012-09-17 Thread Gabbe Nord 
Short reply coming up. I would recommend looking for something that's
probably called kxstudio-welcome or something similar in the repository.
More specifically what you need is the kxstudio welcome script, which sets
your system up properly automatically. I can also warmly recommend getting
the full kxstudio distribution, it's great!
On Sep 17, 2012 3:26 PM, "Thomas Orgis"  wrote:

> Am Mon, 17 Sep 2012 14:12:40 +0200 (CEST)
> schrieb "brian.coll...@alice.it" :
>
> > Hello Thomas,
> > I use KXStudio on top of UbuntuStudio, but the 12.04 version.
>
> I think there is some misunderstanding: I don't have the issues with
> 10.04 but with 12.04. But thanks for the pointer to KXStudio forum ...
> I got confused with all that flavouring of ubuntu. I see that I perhaps
> should not blame UbuntuStudio when I have a partial mix with KXStudio
> (I just treated it as PPA to get current Ardour ... every 'buntu
> install I do seems to need an assortment of PPAs to make it work ...
> the hell of conflicting rpm repos for RHEL gives an acknowledging wink).
>
> So, It seems I'm half-way between two flavours of 'buntu here? You
> install ubuntu ... turn it into ubuntu studio ... then into
> KXStudio ...
>
> I guess I have to test 2, er, 3 setups before continuing to bugger either
> project
>
> 1. roll-back of KXStudio stuff to vanilla UbuntuStudio,
> 2. do a full install of kxstudio-desktop-xfce, kxstudio-meta-audio ...
> and finally, KXStudio-kernel-realtime
> 3. or do a short-track and just install the KXStudio kernel, which
> might be better tested with the kxstudio JACK.
>
> I have prepared a USB drive with AVLinux 6 for comparison ... let's see
> if _some_ setup works. And then, I can figure out what 'buntu or not I
> need to get a working recording box.
>
>
> Alrighty then,
>
> Thomas
>
> PS: Won't UbuntuStudio 12.04 integrate future 2.8.x Ardour releases?
> It's all about bugfixes. And Ardour has lots of those. It just doesn't
> feel right to work with 2.8.12 when there is 2.8.14 . Even if the new
> version introduces new ones, it is one step closer to the illusive
> 2.8.FINAL that finally does not crash during mixing. It's a fine
> tool ... it just should never crash. We should not let web browsers set
> the standard for application stability:-/
> But well, I guess the solution is to go KXStudio right away, which
> seems to provide current versions of things.
>
> --
> Ubuntu-Studio-users mailing list
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> Modify settings or unsubscribe at:
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>
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Re: R: Audio issues in 10.04

2012-09-17 Thread Thomas Orgis 
Am Mon, 17 Sep 2012 15:11:53 +0200
schrieb Ralf Mardorf : 

> Please post the output of
> $ /etc/init.d/rtirq status

Will try to get to that tonight.


Alrighty then,

Thomas


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Re: R: Audio issues in 10.04

2012-09-17 Thread Thomas Orgis 
Am Mon, 17 Sep 2012 14:12:40 +0200 (CEST)
schrieb "brian.coll...@alice.it" : 

> Hello Thomas,
> I use KXStudio on top of UbuntuStudio, but the 12.04 version.

I think there is some misunderstanding: I don't have the issues with
10.04 but with 12.04. But thanks for the pointer to KXStudio forum ...
I got confused with all that flavouring of ubuntu. I see that I perhaps
should not blame UbuntuStudio when I have a partial mix with KXStudio
(I just treated it as PPA to get current Ardour ... every 'buntu
install I do seems to need an assortment of PPAs to make it work ...
the hell of conflicting rpm repos for RHEL gives an acknowledging wink).

So, It seems I'm half-way between two flavours of 'buntu here? You
install ubuntu ... turn it into ubuntu studio ... then into
KXStudio ... 

I guess I have to test 2, er, 3 setups before continuing to bugger either 
project

1. roll-back of KXStudio stuff to vanilla UbuntuStudio,
2. do a full install of kxstudio-desktop-xfce, kxstudio-meta-audio ...
and finally, KXStudio-kernel-realtime
3. or do a short-track and just install the KXStudio kernel, which
might be better tested with the kxstudio JACK.

I have prepared a USB drive with AVLinux 6 for comparison ... let's see
if _some_ setup works. And then, I can figure out what 'buntu or not I
need to get a working recording box.


Alrighty then,

Thomas

PS: Won't UbuntuStudio 12.04 integrate future 2.8.x Ardour releases?
It's all about bugfixes. And Ardour has lots of those. It just doesn't
feel right to work with 2.8.12 when there is 2.8.14 . Even if the new
version introduces new ones, it is one step closer to the illusive
2.8.FINAL that finally does not crash during mixing. It's a fine
tool ... it just should never crash. We should not let web browsers set
the standard for application stability:-/
But well, I guess the solution is to go KXStudio right away, which
seems to provide current versions of things.


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Re: R: Audio issues in 10.04

2012-09-17 Thread Ralf Mardorf 
Please post the output of
$ /etc/init.d/rtirq status

Regards,
Ralf


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R: Audio issues in 10.04

2012-09-17 Thread brian.coll...@alice.it 


Message: 2
Date: Mon, 17 Sep 2012 10:52:51 +0200
From: Thomas Orgis 
To: Ubuntu Studio Users Help and Discussion

Subject: Horrific jackd xrun behaviour after upgrade from US 10.04 to
12.04
Message-ID: <20120917105251.1214a...@orgis.org>
Content-Type: text/plain; charset="us-ascii"

Hi,

the subject says it all ... I had an install of 10.04 that worked. Only
issue seemed to be instability when recording while a USB drive is
connected. So, considering that perhaps this is a sign to replace a
mainboard with broken onboard USB (used a PCI add-on card, which might
have worsened the interrupt situation), I did replace it and the
machine worked fine during a session.

Now with the fully replaced hardware (Asus AM3 board with 780G chipset,
Athlon || X3 460, 8 Gig of Kingston DDR3 ValueRAM, 250 G Seagate SATA
boot, 2 WD EADS on mdraid for recordings and not to forget VIA firewire
on PCI-E (same card as before)) and the update to ubuntu 12.04 (yes,
should have tested the final hardware with 10.04 first, eh?), the
performance is hindered by jackd not being able to keep steady without
generating xruns at a some rate. Not really constant rate, though, also
its behaviour depends on client connections (even when just connecting
meterbridge, this seems to help triggering xruns a lot).

A very interesting fact is that using 3x512 periods (or bigger) is less
stable even than going down to 3x32! With big periods, I get xruns
right away, while with the low setting, I was able to get an hour of
recording done, but that ended prematurely -- I _guess_ that this was
because of some software glitch (like xrun handling) and not due to the
bass player nudging the keyboard by chance. But I cannot be sure about
that.

Now, I do have the lowlatency kernel already installed, also fresh
jack/ardour from kxstudio ... have rtirq setup updated by dpkg
(firewire in there instead of ohci1394). What are the ubuntu studio
folks' thoughts on this? Did you encounter _more_ stable jack with
extremely low latencies? But since it is not really stable and
glitch-free in any config, this interesting characteristic does not
help. Oh, and it happens independent of cpufreq governor. I do use XFCE
and the integrated radeon with open source driver.

Any help on getting that setup stable again is appreciated ... or
should I simply go back to 10.04 (and hand-install current ardour/jack,
as I did before)? I figure that I shouldn't even need a lowlat kernel
for getting basic 3x512 recording work!


Alrighty then,

Thomas.


PS: Why upgrade at all? Well, I have always a spark of hope that some
iteration of the GNU/Linux audio ecosystem will be really stable,
without random crashes of Ardour, for example. But I guess one has to
live with crashing multimedia apps ... not been that different during
my days doing video with Ulead Media Studio on Windows (and the fact
that version 5 was less usable than 2.5).
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End of Ubuntu-Studio-users Digest, Vol 65, Issue 11
***

Hello Thomas,
I use KXStudio on top of UbuntuStudio, but the 12.04 version. I haven't had any 
of the problems you mentioned at all.
You might want to post your question on linuxmusicians forum here: 
http://linuxmusicians.com/viewtopic.php?f=47&t=8012
I think you'll get more specific help with KXStudio there..

brian

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