Re: [LAU] Help with configuring a laptop for Linux Audio work

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To: Lorenzo Sutton <lorenzofsutton@...>
Cc: linux-audio-user <linux-audio-user@...>
Date: Monday, May 12, 2014 - 8:02 am

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Harry,

"And hyperthreading (usually a bios setting)?"

Will try to turn it off.

"Personal experience with an Acer tm 5720, even setting to powersave
governed makes xruns / fallouts go away."

are you suggesting that at powersave mode things are actually better? Why?
I just tried doing this, xruns continue to be generated.

Lorenzo,

"Did this include turning CPU Scaling off and setting _all cores_ to
"performance"?"

Yep.

"Also switching off (internal) wifi improves the situation here."

How do you switch it off?

On Mon, May 12, 2014 at 11:56 AM, Lorenzo Sutton
wrote:

> Hi Louigi,

--
Louigi Verona
http://www.louigiverona.ru/

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Harry,"And hyperthreading (usu=
ally a bios setting)?"Will try to turn it off.<=
/div>"Personal experience with an Acer tm 5720, even sett=
ing to powersave governed makes xruns / fallouts go away."
are you suggesting that at powersave mode things are actually bet=
ter? Why? I just tried doing this, xruns continue to be generated.<=
br>Lorenzo,"Did this include turning CPU Scaling off and=
setting _all cores_ to "performance"?"
Yep."Also switching off (internal) wifi im=
proves the situation here."How do you switch it off=
?
On Mon, May 12, 2014 at 11:56 AM, Lorenz=
o Sutton <lorenzofsutton@gmail.com> wrote:
Hi Louigi,

On 12/05/2014 09:43, Louigi Verona wrote:

Hey guys!

Recently I've bought a Lenovo IdeaPad B590 laptop. As it is announced a=
s
an Ubuntu-certified laptop

[...]

I am using Xubuntu 12.04 with kernel 3.8 now.

1. All real-time priorities and audio group and such standard stuff set
up, checked and rechecked by myself and other people at LAC.

[...]

*Problem 1. Xruns.*

Even if nothing is done on the computer and/or with audio, xruns are
generated. For instance, since I started writing this letter, JACK was
on and right now I have an indicator of xruns in qjackctl which says:
7(13). Note, no audio programs are open at all. If I do nothing, just
turn on JACK and leave laptop running, xruns are also generated.

You said you already check "standard stuff".. Did this include tu=
rning CPU Scaling off and setting _all cores_ to "performance"? I=
n my experience this always makes a very big difference in quantity of xrun=
s regardless of the sound card. Xubuntu doesn't have anything out of th=
e box for that so you'll either have to use cpufrequtils or if intreste=
d I've made a simple python-gtk front-end which sits in the tray for ma=
naging the task if you're interested...

Also switching off (internal) wifi improves the situation here.

*Problem 2. USB interruptions.*

This problem occurs when I am using USB soundcard or USB headset. I get
regular audible interruptions of audio signal. It has no bearing on
xruns and occurs even outside of JACK, just when I am listening to
Audacious, for example. I tried switching from PulseAudio to ALSA, same
result. I though do not remember checking this with YouTube videos, for
instance, and right now have no usb devices at hand to check.

I get the same problem with using the zoom H4 as a USB device and up to now=
found no solution. I recently got a zoom R8 and with that the issue doesn&=
#39;t seem to be present (although I haven't tested it much as USB devi=
ce...) so I assume it *might* be a device problem.

So.. good luck and do share relevant results, as I think some general '=
laptop' info might be interesting regardless of brands.

Lorenzo.

_______________________________________________
Linux-audio-user mailing list
=
Linux-audio-user@lists.linuxaudio.org

http://lists.linuxaudio.org/listinfo/linux-audio-user
-- Louigi Veronahttp://www.louigiverona.ru/

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Messages in current thread:
[LAU] Help with configuring a laptop for Linux Audio work, Louigi Verona, (Mon May 12, 7:46 am)
Re: [LAU] Help with configuring a laptop for Linux Audio work, Louigi Verona, (Mon May 12, 8:02 am)
Re: [LAU] Help with configuring a laptop for Linux Audio work, Federico Galland, (Tue May 13, 11:10 pm)
Re: [LAU] Help with configuring a laptop for Linux Audio work, Jeremy Jongepier, (Mon May 12, 8:24 am)
Re: [LAU] Help with configuring a laptop for Linux Audio work, Jeremy Jongepier, (Mon May 12, 9:08 am)
Re: [LAU] Help with configuring a laptop for Linux Audio work, Jeremy Jongepier, (Mon May 12, 9:27 am)
Re: [LAU] Help with configuring a laptop for Linux Audio work, Jeremy Jongepier, (Mon May 12, 9:36 am)
Re: [LAU] Help with configuring a laptop for Linux Audio work, Jeremy Jongepier, (Mon May 12, 11:15 am)
Re: [LAU] Help with configuring a laptop for Linux Audio work, Harry van Haaren, (Mon May 12, 7:54 am)