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Overwhelming number of xruns in Ubuntustudio

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Ricardo Lobo

7 Oct 2007 7 Oct '07

1:05 a.m.

Hi there, I'm getting a strange and very high number of xruns in ubuntustudio. I don't know what is causing it. The xruns start as soon as I launch jack, and I don't even need to start anything else. I had Ubuntu Feisty installed and thought the problem was the kernel, so I installed Ubuntustudio, but it didn't help.

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porl sheean

7 Oct 7 Oct

2:50 a.m.

i have been having the same issue. i think it is kernel related. i'm just doing an update in gutsy now to see if this kernel fixes it, but if not i'll go back to my previous solution. i basically downloaded the kernel from 64studio and installed that manually using dpkg. *all* my xrun problems went away. definately worth trying. i'm not sure what the difference is in the kernels, but the ubuntu one (even the -rt one) definately has some problem (for me anyways). I'm using an rme9636 hammerfall card by the way. porl On 07/10/2007, Ricardo Lobo <ricardolobo(a)audienciazero.org> wrote:

Hi there, I'm getting a strange and very high number of xruns in ubuntustudio. I don't know what is causing it. The xruns start as soon as I launch jack, and I don't even need to start anything else. I had Ubuntu Feisty installed and thought the problem was the kernel, so I installed Ubuntustudio, but it didn't help. _______________________________________________ Linux-audio-user mailing list Linux-audio-user(a)lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-user

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Mark Constable

3:40 a.m.

On 2007-10-07 15:14, porl sheean wrote:

i have been having the same issue. i think it is kernel related. i'm just doing an update in gutsy now to see if this kernel fixes it, but if not i'll go back to my previous solution. i basically downloaded the kernel from 64studio and installed that manually using dpkg. *all* my xrun problems went away. definately worth trying. i'm not sure what the difference is in the kernels, but the ubuntu one (even the -rt one) definately has some problem (for me anyways). I'm using an rme9636 hammerfall card by the way.

Perhaps a diff -u /boot/64s_kernel.config /boot/us_kernel.config might provide a hint of what's different. Ie; here are some settings that seem to be added to my 2.6.22 ArchLinux kernel for the rt9 patched version... # diff -u /boot/kconfig26 src/linux-2.6.22/.config | grep ^+ +++ src/linux-2.6.22/.config 2007-10-07 12:47:14.000000000 +1000 +# Sun Oct 7 12:47:14 2007 +CONFIG_GENERIC_CMOS_UPDATE=y +CONFIG_NONIRQ_WAKEUP=y +CONFIG_LOCALVERSION="-rt" +CONFIG_TIMERFD=y +CONFIG_GENERIC_CLOCKEVENTS_BUILD=y +CONFIG_RWSEM_GENERIC_SPINLOCK=y +CONFIG_ASM_SEMAPHORES=y +# CONFIG_PREEMPT_DESKTOP is not set +CONFIG_PREEMPT_RT=y +CONFIG_PREEMPT_SOFTIRQS=y +CONFIG_PREEMPT_HARDIRQS=y +# CONFIG_CLASSIC_RCU is not set +CONFIG_PREEMPT_RCU=y +CONFIG_RCU_TRACE=y +CONFIG_REGPARM=y +# CONFIG_HZ_300 is not set +CONFIG_HZ_1000=y +CONFIG_HZ=1000 +# CPU idle PM support +# +# CONFIG_CPU_IDLE is not set +# +# CONFIG_RTC_HISTOGRAM is not set +CONFIG_BLOCKER=y +CONFIG_LPPTEST=m +CONFIG_RMEM=m +CONFIG_ALLOC_RTSJ_MEM=m +CONFIG_SND_AD1848_LIB=m +CONFIG_SND_CS4231_LIB=m +CONFIG_ECRYPT_FS=m +# CONFIG_BEFS_FS is not set +CONFIG_PROFILE_NMI=y +CONFIG_SCHED_DEBUG=y +# CONFIG_LOCK_STAT is not set +# CONFIG_EVENT_TRACE is not set +# CONFIG_FUNCTION_TRACE is not set +# CONFIG_WAKEUP_TIMING is not set +# CONFIG_CRITICAL_PREEMPT_TIMING is not set +# CONFIG_CRITICAL_IRQSOFF_TIMING is not set +# CONFIG_REALTIME_CAPABILITIES is not set --markc

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Ivica Ico Bukvic

3:45 a.m.

Do you have Intel HDA soundcard? If so, please try adding the following to your /etc/modprobe.d/alsa-base: options snd-hda-intel position_fix=1 (also try 2 and 3--on my Santa Rosa MBP 3 works the best) Hope this helps! Best wishes, Ico

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Sampo Savolainen

7:55 a.m.

On Sun, 2007-10-07 at 04:05 +0100, Ricardo Lobo wrote:

Hi there, I’m getting a strange and very high number of xruns in ubuntustudio. I don’t know what is causing it. The xruns start as soon as I launch jack, and I don’t even need to start anything else. I had Ubuntu Feisty installed and thought the problem was the kernel, so I installed Ubuntustudio, but it didn’t help.

Are you using the same parameters for jackd that you were using previously? If that does not help, please tell us what sound card and what jackd parameters you are using. Sampo

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Ricardo Lobo

12:27 p.m.

Hi, Yes, the parameters are the same, I think they are the default ones: Frames / Period 1024 Sample Rate 44100 Hz Perios Buffer 2 My soundcard is a Conexant AC-Link Audio, I'm on a Hp dv5000 laptop. I changed driver from ALSA to OSS in JACK and the xruns stopped, is this helpful to identify the problem? thanks Sampo Savolainen wrote:

On Sun, 2007-10-07 at 04:05 +0100, Ricardo Lobo wrote:

Hi there, I’m getting a strange and very high number of xruns in ubuntustudio. I don’t know what is causing it. The xruns start as soon as I launch jack, and I don’t even need to start anything else. I had Ubuntu Feisty installed and thought the problem was the kernel, so I installed Ubuntustudio, but it didn’t help.

Are you using the same parameters for jackd that you were using previously? If that does not help, please tell us what sound card and what jackd parameters you are using. Sampo

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Sampo Savolainen

2:53 p.m.

On Sun, 2007-10-07 at 15:27 +0100, Ricardo Lobo wrote:

Hi, Yes, the parameters are the same, I think they are the default ones: Frames / Period 1024 Sample Rate 44100 Hz Perios Buffer 2 My soundcard is a Conexant AC-Link Audio, I'm on a Hp dv5000 laptop.

Is that a intel-hda card? If so, try 3 periods per buffer. It seems those types of "soundcards"(*) don't work with anything else. You might also benefit from a slightly smaller frames / period, like 512. The driver flags mentioned by Ivica Ico Bukvic (position_fix=1) is also a good idea. My intel-hda "soundcard" only produces distortion without it.

I changed driver from ALSA to OSS in JACK and the xruns stopped, is this helpful to identify the problem?

The alsa driver should be better in the performance sense. You should try different options for jack until you get it right. Sampo (*) The intel-hda type interfaces have caused a lot of headache for people using linux.

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Ricardo Lobo

11:53 p.m.

Hi people, Tried changing to 3 periods per buffer. I also tried the position_fix=1 2 and 3. Alas! The problem remains. Any ideias left? thanks, Lobo Sampo Savolainen wrote:

On Sun, 2007-10-07 at 15:27 +0100, Ricardo Lobo wrote:

Hi, Yes, the parameters are the same, I think they are the default ones: Frames / Period 1024 Sample Rate 44100 Hz Perios Buffer 2 My soundcard is a Conexant AC-Link Audio, I'm on a Hp dv5000 laptop.

Is that a intel-hda card? If so, try 3 periods per buffer. It seems those types of "soundcards"(*) don't work with anything else. You might also benefit from a slightly smaller frames / period, like 512. The driver flags mentioned by Ivica Ico Bukvic (position_fix=1) is also a good idea. My intel-hda "soundcard" only produces distortion without it.

I changed driver from ALSA to OSS in JACK and the xruns stopped, is this helpful to identify the problem?

The alsa driver should be better in the performance sense. You should try different options for jack until you get it right. Sampo (*) The intel-hda type interfaces have caused a lot of headache for people using linux.

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J M Needham

8 Oct 8 Oct

9:44 a.m.

Aside, I've been battling with a TOshiba Satellite P200 with Intel HDA soundcard. after working through many howto's and still getting incredible numbers of xruns, I changed to 3 periods per buffer and now I have none. Just thought someone might like to know... On Mon, 8 Oct 2007, Ricardo Lobo wrote:

Hi people, Tried changing to 3 periods per buffer. I also tried the position_fix=1 2 and 3. Alas! The problem remains. Any ideias left? thanks, Lobo Sampo Savolainen wrote:

On Sun, 2007-10-07 at 15:27 +0100, Ricardo Lobo wrote:

Hi, Yes, the parameters are the same, I think they are the default ones: Frames / Period 1024 Sample Rate 44100 Hz Perios Buffer 2 My soundcard is a Conexant AC-Link Audio, I'm on a Hp dv5000 laptop.

Is that a intel-hda card? If so, try 3 periods per buffer. It seems those types of "soundcards"(*) don't work with anything else. You might also benefit from a slightly smaller frames / period, like 512. The driver flags mentioned by Ivica Ico Bukvic (position_fix=1) is also a good idea. My intel-hda "soundcard" only produces distortion without it.

I changed driver from ALSA to OSS in JACK and the xruns stopped, is this helpful to identify the problem?

The alsa driver should be better in the performance sense. You should try different options for jack until you get it right. Sampo (*) The intel-hda type interfaces have caused a lot of headache for people using linux.

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participants (6)

Ivica Ico Bukvic
J M Needham
Mark Constable
porl sheean
Ricardo Lobo
Sampo Savolainen