At Thu, 16 Aug 2007 20:09:25 -0700 (PDT), Bill Unruh wrote: > > On Thu, 16 Aug 2007, Celso Gorrín wrote: > > > Ok. This is probably the fastest-resolved issue on this list ever. > > > > By looking to some not subwoofer-related posts on this list I found that > > adding the option "index=0" to the module could be a good idea for > > solving some other problem I can't remember right now. So, since I was > > feeling I had nothing to lose, I tried it. > > > > So, I added the line "options snd-hda-intel index=0 model=ref" to my > > /etc/modprobe.conf and I finally got the LFE control. > > > > These options are almost insane. As was posted here there are over a > hundred options for various and sundry things. And very little that tells > you what they actually do. Eg, model=ref-- what does that mean? And > index=0? What index? and why 0, ratehr than 5897? > Surely the driver is the thing which knows best what it should be trying. > Are there not some tests that the driver could carry out to set these > options on its own? > > I am frustrated because I am trying to test a new computer ( the Toshiba > U300 series) to see if sound will work on them, since sound is important > for its use. I have a live disk (MCNLive) to use to test, but with this > huge list of options, it is almost impossible to do so, while standing on > one leg in the shop hoping a salesman does not see me and ask what I am > doing. > I realise that this is not entirely the writer's fault, since the > manufacturers seem to delight in making their system different in some > entirely inconsequential but crucial way. The index option shouldn't influence on the appearance of mixer elements. It must be a side-effect of something else (e.g. didn't write correctly earlier but now corrected). The index option has a meaning only when you have multiple sound devices. Otherwise, you don't have to touch it. The model option is _the_ important option for HD-audio driver. It overrides the configuration preset. As default, the driver reads the PCI (subsystem) IDs to identify which configuration preset to use. If not found, the driver does a guess work from the BIOS setup in most cases. Now, since many laptops are shipped with broken BIOS and the guess work is imperfect, you often face the famous problem -- "sound doesn't work" (great words that explain everything). Then you can pass model option for the preset designed for anohter hardware (e.g. model=thinkpad) to make the driver probe as if it's such a hardware. If you are lucky, your device is similar with others, and the driver works with such a preset. If not, we'd need to hack another preset for matching with your device. The list of available model option is found in ALSA-Configuration.txt. Takashi ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
