Sounds like you need filesystem tweaks to prevent the audio player from being starved of data.A list of music tracks written for the Battle for Wesnoth. Nepomuk/virtuoso seem more stable on KDE 4.10, and usually finish their new-file indexing and go away a few minutes after logging in anyway. I haven't bothered to dig deeper, as the easy fix is to make sure nepomuk/virtuoso aren't running if the audio stutters. It may just manifest itself on certain hardware/driver combinations such as my Shuttle. I'm fairly certain it's related to the SATA subsystem, as my disk activity LED 'hangs' lit for a second or so at the same time as the audio skips. Most likely either the kernel is running out of I/O buffers, or there is some disk I/O hardware activity/stall happening. The problem seems to be that even with those lowest possible nice levels some I/O subsystem itself occasionally stalls when nepomuk/virtuoso is indexing lots of small files while audio is playing at the same time. Even though they consume around 30% on each of my four cores while they're running, they don't noticeable interfere with most desktop tasks. Then that should be run using nice and ionice - see info.Īlso, sound-playing apps should have their priority boosted - again, using nice and ionice.Īctually, the nepomuk and virtuoso processes ARE running at a nice level of 19 and an ionice of idle. KDE (namely nepomuk/virtuoso) doing its file scanning Just an FYI in case you happening to be running KDE. The underruns stop once nepomuk/virtuoso stop scanning. On directories with lots of small files it impacts I/O processes, causing audio underruns. In my case, the issue is KDE (namely nepomuk/virtuoso) doing its file scanning. It's not uncommon for my onboard HDA Intel audio to underrun after I log in to my desktop. Sound support in the Intel chipset used as an example in the article.) (Onboard sound in AMD and Nvidia chipsets works the same way as the Note that the VIA VT1708S is only the codec. It seems I no longer get these overrun since I did that ! I must check with more apps. Options snd-hda-intel index=0 probe_mask=1 model=acer-aspire-8930g I don't need that soundcard integrated to graphic card ! (can only be source of problems) Thief2 can crackle, but luckily Thief2 can use openal instead, which works much better.Ībout the two cards using the same driver, any idea how to blacklist one card ? Yes, see buffer_size in the config in my sig, for how it's done. nice is concerned with getting your app some CPU time when appropriate to stop the buffer from emptying. Sound card #1 : nvidia integrated soundcard on the graphic card (I don't need it, can't blacklist it by blacklisting the driver) Sound card #0 : VIA VT1708s driver snd_hda_intel asounrc option ? Or is there another way to do that ?Ī lot of apps, for example : Battle for Wesnoth or Wine (ok, wine has multiple sound issues so maybe it's normal)Ģ sound cards using the same driver ( should be a cause of this problem maybe ?) : If getting under-runs, try doubling the buffer_size to 16384.ĭo you mean with the. Which one of those would be related to sound buffer ? what apps? Also, check that your soundcard is configured correctly, e.g. You should put more effort into understanding that link I gave you, and provide more detail, e.g. If getting under-runs, try doubling the buffer_size to 16384. Those are normally OK - I use those values. Thanks for your reply.Anyway, are you sure it's the good link ? This seems more related to file copyĬat /proc/asound/card0/pcm0p/sub0/hw_paramsĬan it be a problem of frequency rate ? (most of the time default is 44.1, not 48) Improve your font rendering and ALSA sound In general, raise the app's priority, because audio is a real-time process. ![]() I often get this message with several apps :ĪLSA lib pcm.c:7339:(snd_pcm_recover) underrun occurredĠ0:14.2 Audio device: Advanced Micro Devices nee ATI SBx00 Azalia (Intel HDA)īy the way, my soundcard is VIA VT1708S controry to what lspci shows. Posted: Fri 8:21 pm Post subject: Alsa underrun Gentoo Forums :: View topic - Alsa underrun
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