On Sun, 5 Feb 2012 09:21:56 -0600 Jonathan Nieder <jrnieder@gmail.com> wrote: > Sorry for the lack of clarity. These symptoms are indeed expected to > affect many laptops with an ALC861 codec, not just Asus laptops. The > problem is that different machines use a different mechanism to turn > on or off sound completely. The driver has a table that documents > this sort of thing for (1) all ASUS laptops (after the fix to > bug#657302), (2) Haier W18, (3) FSC Amilo Pi1505. > > So, the next step is to work with upstream to get the pin routing > information for your laptop. I'll send some hints on this in a > separate message. It might not matter, but my current system, correctly identified by 'alsa-info.sh' as an "HP Compaq dx2200 MT", is a Desktop box, not a laptop. The sound card is part of the mobo, however, which is somewhat laptop-like. More here: Manuals (guides, supplements, addendums, etc) HP Compaq dx2200 Microtower PC http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&lang=en&cc=us&prodSeriesId=1844701&prodTypeId=12454 To fetch pin routing data via 'hda-verb' requires recompiling the kernel. This week I haven't enough time to build a kernel. (Bandwidth=dialup.) Pity there isn't a simpler method; even using a multitester on the mobo would be less hassle than rebuilding the kernel. Searching the web for 'HP Compaq dx2200 MT "hda-verb"' finds some kernel module patch notes from 2007: [ALSA] hda-codec - Add quirks for HP dx2200/dx2250 HP dx2200 and dx2250 use Micro-Star International (MSI) motherboards (models MS-7254 and MS-7297 respectively) with an ALC862 codec in threestack configuration. Adding this quirk allows correct 5.1 sound output in these systems. Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz> http://www.codebrowse.net/history/linux-3.0/sound/pci/hda/patch_realtek.c Sound on this box with my previous stock Debian kernels worked. Today I reverted to 'linux-image-3.1.0-1-686-pae', under which the sound still works fine. Attached are the outputs of 'alsa-info.sh' for the the downgraded (good sound 3.1.0-1) kernel, and the newer (no sound working 3.2.0-1) kernel. As advised I've CC:'d this email upstream, for whom the relevant Debian bug reports can be found here: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=657302&archived=False&mbox=no http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=658728&archived=False&mbox=no HTH...
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