Hola - I have a relatively new notebook (L702x) which has an alc665-based HDA device.
The out-of-box configuration for ALSA in the current upstream kernel (3.0.1, ALSA v1.0.24) seems to do something which puts the left speaker to sleep at unpredictable times - and leave it there, and equally unpredictably wake it up again; it's always a soft fade-out/ fade-in transition when this occurs, never a hard off (and never any crackle or pop as it happens) - exactly as if the audio is being slowly set from balanced 50% left 50% right, to, 100% right (or back). Interestingly enough once this has started happening, the same will happen if the factory-installed Win7 x64 image is warm-booted (to restore sanity you need to go into the Windows audio control panel and carefully reset each setting - both the master volume level, and the individual L/R balance levels); ditto with the Dell diagnostics tool (after the sound chip has entered the twilight zone, tests which should produce audio on the left speaker instead produce _only_ right-side audio for either L-only or R-only tests). My initial guess would be that the pin/ mixer routing is not quite correct for alc665 using "auto" config and that perhaps as a result verbs are being sent to something they oughtn't be; this thought is bolstered by the lack of an individual level control for the subwoofer (which the Windows drivers can definitely control - whether this is through _input_ tweaking or not is not apparent; the Windows drivers - "hdxsg" - are infested with a SRS software shim/ preprocessor, so all bets on my side are off). I have far better luck after overriding model= - for the moment I've picked 3stack (I have no surround-sound receiver at my disposal to test 5ch/6ch modes on, nor do I own any digital receivers - only the fixed speakers in the notebook, which, it must be said, are glorious, and a pair of equally glorious Sennheiser headphones). In any case I've uploaded the alsa-info output as ... http://www.alsa-project.org/db/?f=b3a21e8487fe000edb4380cd4b91999c21b4f4f6 ... after cold-booting Windows, then painstakingly resetting all the audio levels, then warm-booting linux (with index=0, model=3stack set). I'm hoping that someone will be able to help me take this further (cooking up a custom patch file is completely beyond me, as it seems is doing anything particularly clever with HDA_Analyzer beyond admiring the graph it produces) - so that I can regain the level control (or at least an on/ off toggle) for the subwoofer. More importantly, it'd be nice to help fix the model=auto type in the process, so that anyone else fortunate enough to own one of these beasts can appreciate their JBL speakers without thinking they're suffering early-onset left-ear deafness. I've also snarf'd the Windows driver install files (from the DriverStore directory) in case that proves useful - please contact me off-list if you'd like me to go look at anything in particular there. Finally, I'd also appreciate being put in Cc: on replies - to keep mailbox spammage down, I've set the daily summaries flag on my list subscription. Thanks and regards, Simon ------------------------------------------------------------------------------ uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
