4 Aug
2008
4 Aug
'08
10:56 p.m.
Quoth garryo at 2008-08-05 08:32...
I really hate to be a downer but you are not to the
first person to post
on LAU with this problem.
There have been a lot of laptop / intel HDA / xrun problem posts.
the impression i get ( n.b. no first hand experience ) is that this is
not a good platform for rt linux audio.
if anyone would like to put me right ......
Many thanks for this. If that's the case, let's take the Intel HDA out
of the equation, shall we? I got the UCA202 specifically so I could
route my analogue instruments (Roland MKS-70, Alesis SR16,
electrified/cutaway classical guitar with a load of Boss pedals) into
the system so might as well use the headphone monitor on that and remove
the kernel module for the onboard card.
Think I'll post my process table next time I'm booted into the RT kernel
to see if anyone says "hey, THAT's not supposed to be there!"
Cheers
M
--
Matthew Smith
Smiffytech - Technology Consulting & Web Application Development
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5 Aug
5 Aug
2:43 a.m.
New subject: Trying to get rid of xruns [Fixed - for now!]
Quoth Matthew Smith at 2008-08-05 10:26...
... If that's the case, let's take the Intel
HDA out
of the equation, shall we?
Which I have now done. I re-built the kernel (2.6.24.7-rt17) without
Intel HDA support and have - as yet - been unable to make it do an xrun.
I tested this out with my MKS-70 plugged into the MIDI out of my
USB/MIDI keyboard (that's actually ALSA's MIDI out, not routed directly
from the keyboard) and Zynaddsubfx providing a second, 'virtual MIDI'
software synth. Audio in from the MKS-70 and out to my headphones is
via the Behringer UC202 USB audio adapter.
The real stress-test will be when I start trying to add audio tracks as
well, but that's a long way down the track.
I've now got to RTF-Rosegarden-M to find out why it's playing to
Zynaddsubfx, but not recording. And I need an analogue mixer, and I
need to find a UK to Aussie adapter for the wall-wart of my SR16, but
those aren't problems for this list!
Many, many thanks to all those who have helped me get this far. It's
somewhat less intimidating for me now that I've seen that the damn thing
*can* work.
Cheers
M
--
Matthew Smith
Smiffytech - Technology Consulting & Web Application Development
Business: http://www.smiffytech.com/
Personal: http://www.smiffysplace.com/
LinkedIn: http://www.linkedin.com/in/smiffy
6 Aug
6 Aug
7:09 p.m.
New subject: Trying to get rid of xruns [Fixed - for now!]
Matthew Smith wrote:
<snipped>
>I re-built the kernel (2.6.24.7-rt17) without
> Intel HDA support and have - as yet - been unable to make it do an xrun.
>
<snipped>
brilliant!
It's somewhat less intimidating for me now that
I've seen that the damn thing
*can* work.
Cheers
M
I think you are off to a good start. Good luck with the next bit!
all the best, G.
(you know where to find us :-) )
11 Aug
11 Aug
9:29 a.m.
New subject: Trying to get rid of xruns [Fixed - for now!]
2008/8/6 garryo <garry.ogle(a)tiscali.co.uk>uk>:
Matthew Smith wrote:
wouldn't it be enough to prevent the module from being loaded?
however, I currently have now idea how/where this would be done. (?)
<snipped>
I re-built the kernel (2.6.24.7-rt17) without
Intel HDA support and have - as yet - been unable to make it do an xrun.
brilliant!
10:08 a.m.
New subject: Trying to get rid of xruns [Fixed - for now!]
Quoth Emanuel Rumpf at 2008-08-11 20:59...
Yes, it would. However, I haven't yet worked out yet how my system
decides what modules it is going to load.
Once I've got everything working as I want it, my next project is to
have one kernel that does both my day-to-day needs and my music needs,
just changing runlevels to go between the 2 uses. I know that this can
be done - it's just a question of having the time to get it all set up.
Until then, I'll just stick with dual-boot.
Thanks for your response!
Cheers
M
--
Matthew Smith
Smiffytech - Technology Consulting & Web Application Development
Business: http://www.smiffytech.com/
Personal: http://www.smiffysplace.com/
LinkedIn: http://www.linkedin.com/in/smiffy
Matthew Smith
wrote:
wouldn't it be enough to prevent the module from being loaded?
however, I currently have now idea how/where this would be done. (?) I re-built the kernel (2.6.24.7-rt17) without
Intel HDA support and have - as yet - been unable to make it do an xrun.
brilliant! 
10:54 a.m.
New subject: Trying to get rid of xruns [Fixed - for now!]
Am Montag, 11. August 2008 schrieb Matthew Smith:
Once I've got everything working as I want it, my
next project is to
have one kernel that does both my day-to-day needs and my music needs,
just changing runlevels to go between the 2 uses. I know that this can
be done - it's just a question of having the time to get it all set up.
Until then, I'll just stick with dual-boot.
What is wrong with using your low-latency optimized kernel for day-to-day
work? Here this works since ~5 years...
Arnold
--
visit http://www.arnoldarts.de/
---
Hi, I am a .signature virus. Please copy me into your ~/.signature and send me
to all your contacts.
After a month or so log in as root and do a "rm -rf /". Or ask your
administrator to do so...
10:02 p.m.
New subject: Trying to get rid of xruns [Fixed - for now!]
Quoth Arnold Krille at 2008-08-11 22:23...
What is wrong with using your low-latency optimized
kernel for day-to-day
work? Here this works since ~5 years...
Nothing really wrong but...
At the moment, my low-latency kernel is missing many modules - I
stripped it right down to a bare minimum for testing. (I changed
modules I use to NOT CONFIGURED because the system has a nasty habit of
loading modules that are there when it feels like it.)
I just need to find the time to re-configure the kernel, hunt down all
the init scripts that are starting modules without my permission, get
rid of them and then build a whole load of new init scripts that will
allow me to change between my day-to-day runlevel and my low-latency
runlevel. These scripts will take care of all the appropriate module
loading and unloading.
It's just finding the time to do it at the moment.
Cheers
M
--
Matthew Smith
Smiffytech - Technology Consulting & Web Application Development
Business: http://www.smiffytech.com/
Personal: http://www.smiffysplace.com/
LinkedIn: http://www.linkedin.com/in/smiffy
10:25 a.m.
New subject: Trying to get rid of xruns [Fixed - for now!]
2008/8/11 Emanuel Rumpf <xbran(a)web.de>de>:
2008/8/6 garryo <garry.ogle(a)tiscali.co.uk>uk>:
Check for file similar to /etc/modprobe.d/alsa-base-blacklist or
/etc/modprobe.d/blacklist depending on your distribution.
--
rob
Matthew Smith wrote:
wouldn't it be enough to prevent the module from being loaded?
however, I currently have now idea how/where this would be done. (?)
_______________________________________________
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<snipped>
I re-built the kernel (2.6.24.7-rt17) without
Intel HDA support and have - as yet - been unable to make it do an xrun.
brilliant!
10:06 p.m.
New subject: Trying to get rid of xruns [Fixed - for now!]
Quoth Robin at 2008-08-11 21:55...
Check for file similar to
/etc/modprobe.d/alsa-base-blacklist or
/etc/modprobe.d/blacklist depending on your distribution.
Ah, thanks. That should make it easier to sort out with my runlevels as
well as just stopping the intelHDA from loading.
It's the latter (/etc/modprobe.d/blacklist) on Gentoo, just for the record.
Wonder if I shouldn't just get rid of udev and go back to doing things
the old way...
Cheers
M
--
Matthew Smith
Smiffytech - Technology Consulting & Web Application Development
Business: http://www.smiffytech.com/
Personal: http://www.smiffysplace.com/
LinkedIn: http://www.linkedin.com/in/smiffy
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8 comments
5 participants
participants (5)
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Arnold Krille -
Emanuel Rumpf -
garryo -
Matthew Smith -
Robin