Update: I've found a good workaround for Symptom 4: http://www.razorsedge.org/~mike/docs/asoundrc.html and running Java under aoss It seems to reliably remove the sound artifact problem. On Nov 7, 2008, at 11:57 AM, Joshua Smith wrote: > Hello, I'm trying to get sound to work reliably on an HP TouchSmart > IQ816. Here are the particulars: > > Linux 2.6.24.3 (SLAX, derived from Slackware) > Alsa 1.0.18 > lspci: 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD > Audio Controller (rev 04) > Controller: AD1984B > Booting with irqpoll, because without it, video drivers do not work > > Symptom 1: No sound out the speakers, but line-out works > Workaround: Using model=mobile or model=laptop, sound comes out the > speaker but not the line-out (I can live with this, but I'd be happy > to work with the developers to find a solution where both speakers AND > line-out work) > > Symptom 2: Message in the log telling me to set bdl_pos_adj > Workaround: Using bdl_pos_adj=32 the message went away > > Symptom 3: Network stops working after a little while > Workaround: Using enable_msi=1 seems to have resolved this (which is > odd, because everything I read on the web made me think that > "disable_msi=1" would solve it) > > Symptom 4: The first audio file I play sounds great, but by the second > or third thing I play, the sound gets a lot of high-frequency noise in > it, making it sound "tinny" like an over-driven 1-inch speaker. > > Once this condition starts, unloading/reloading the snd_hda_intel > module does not fix the problem. However, the problem does > spontaneously go away sometimes, and then spontaneously comes back. I > can quite reliably reproduce the problem using a Java program to > create the sound, but I cannot reproduce it using aplay. (Although if > the sound becomes tinny after playing a couple sounds from java, then > aplay will be tinny as well). > > My best guess is that this is really caused by the OSS compatibility > modules. If I rig my Java program to use ALSA for audio instead of > the "Java Sound" mixer (which seems to rely on OSS), the problem does > not occur. However, if I just modprobe -r away all the OSS modules, > then some Java APIs stop working because they only work with OSS. > > I'm going to see how hard it would be to rework our application to > never use the Java APIs that use OSS, but if there is a better > solution I'd love to hear it! > > Thanks. > > -Joshua > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win > great prizes > Grand prize is a trip for two to an Open Source event anywhere in > the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Alsa-user mailing list > Alsa-user@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/alsa-user > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
