The following issue has been REOPENED. ====================================================================== <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1044> ====================================================================== Reported By: jefferai Assigned To: ====================================================================== Project: ALSA - driver Issue ID: 1044 Category: PCI - intel8x0 Reproducibility: always Severity: major Priority: normal Status: feedback Distribution: Gentoo Kernel Version: 2.6.16 ====================================================================== Date Submitted: 04-11-2005 17:41 CEST Last Modified: 07-15-2006 15:32 CEST ====================================================================== Summary: Heavily distorted audio Description: I have a laptop that is fine by itself, but when plugged into my docking station I get heavily distorted audio when something plays either directly to hw0:0 or through the OSS emulation. The problem seems to be with sample rate conversion -- if I create my own dmix-based device that resamples audio to 48KHz and then plays it to hw0:0, and I have an ALSA-aware app that lets me define which device to use and set it to that device, the audio is beautiful both on and off of the docking station. Unfortunately, not all apps allow these settings, so things such as RealPlayer and Flash (in Firefox) sound horrid if I'm on my docking station, which is most of the time. I've seen this same problem through three Linux distributions now (Gentoo, SuSE, and Fedora Core 3) on the same laptop so I know it's an ALSA issue (or configuration issue) and not distribution-specific. I've hard-set the ac97 clock option in the snd-intel8x0 module to 48000 but this doesn't help, and my clock is detected as being 48000Hz anyways. I don't know what to do. Some people have said to point OSS apps to /dev/adsp but apps complain it's not a valid device, and anyways pointing to anything but /dev/dsp doesn't seem to be an option for all apps. Besides, I'd still have the ALSA issues for apps that don't let you define which device to use. Following are relevant snippets of files. I'm on up-to-date Gentoo linux using the Gentoo alsa-driver, alsa-tools, alsa-headers, alsa-lib, and alsa-oss ebuilds, all 1.0.8. Configuration files are the defaults (I added the extra device with a .asoundrc). TIA, Jeff ====================================================================== ---------------------------------------------------------------------- rlrevell - 03-01-06 01:35 ---------------------------------------------------------------------- Also what's the exact model of the laptop? This might be hard to fix (lack of documentation)... ---------------------------------------------------------------------- jefferai - 07-15-06 15:32 ---------------------------------------------------------------------- The exact model of the laptop is a Dell Inspiron 8600. I have a port replicator for it. I only see this behavior if my speakers are connected to the audio out jack in the port replicator; if they are connected to the audio out in my laptop, then I do not have this problem. And again, I only see the problem when connected to the port replicator and something uses OSS, or uses ALSA without allowing me to select my device that forces a sample rate conversion to 48000. I also see other behavior, like the Headphone mixer only having an effect when plugged directly into the laptop, not the port replicator (the PCM mixer always has an effect). I'm using the following ~/.asoundrc: pcm.jeff { type plug slave.pcm { type dmix ipc_key 8888 slave { pcm "hw:0,0" period_time 0 buffer_time 0 period_size 2048 buffer_size 32768 rate 48000 } bindings { 0 0 1 1 } } } ctl.jeff { type hw card { @func getenv vars [ ALSA_CTL_CARD ALSA_CARD ] default { @func refer name defaults.ctl.card } } } pcm.dsp0 { type plug slave.pcm { type dmix ipc_key 8888 slave { pcm "hw:0,0" period_time 0 buffer_time 0 period_size 2048 buffer_size 32768 rate 48000 } bindings { 0 0 1 1 } } } Issue History Date Modified Username Field Change ====================================================================== 04-11-05 17:41 jefferai New Issue 04-11-05 17:41 jefferai Distribution => Gentoo 04-11-05 17:41 jefferai Kernel Version => 2.6.11-ck3 04-12-05 16:32 tiwai Note Added: 0004448 04-12-05 18:13 jefferai Note Added: 0004457 04-12-05 18:39 tiwai Note Added: 0004458 12-30-05 04:42 rlrevell Note Added: 0007219 03-01-06 01:02 rlrevell Status new => closed 03-01-06 01:29 jefferai Kernel Version 2.6.11-ck3 => 2.6.15 03-01-06 01:29 jefferai Status closed => feedback 03-01-06 01:29 jefferai Resolution open => reopened 03-01-06 01:29 jefferai Note Added: 0008258 03-01-06 01:34 rlrevell Note Added: 0008260 03-01-06 01:35 rlrevell Note Added: 0008261 04-14-06 03:31 Ensnared Issue Monitored: Ensnared 07-15-06 01:58 Adrian Bunk Status feedback => closed 07-15-06 01:58 Adrian Bunk Resolution reopened => unable to duplicate 07-15-06 15:32 jefferai Kernel Version 2.6.15 => 2.6.16 07-15-06 15:32 jefferai Status closed => feedback 07-15-06 15:32 jefferai Resolution unable to duplicate => reopened 07-15-06 15:32 jefferai Note Added: 0011023 ====================================================================== ------------------------------------------------------------------------- Using Tomcat but need to do more? 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