[ltp] no sound on resume from suspend to disk on thinkpad X31 + 2.6.20

Bill Sheppard linux-thinkpad@linux-thinkpad.org
Wed, 07 Mar 2007 22:58:44 -0800

The Anarcat wrote:
> On my X31, suspend to disk works fairly well, except for this particular
> problem: on resume, no sound comes out of the speakers (or the
> headphones jack). The sound card is detected fine, and I can actually
> *play* some files, but not hear the output.
I have a possibly related issue on my T42 (SuSE 9.3); sometimes upon 
resuming I only get sound from the right speaker, none or static from 
the left.  It can be resolved by hibernating.  I suspect that something 
isn't properly resetting the sound registers; a hibernate does a full 
power-off, so things start in a known configuration, but perhaps with 
suspend things aren't full initialized.

> This used to work on 2.6.18, so I wonder if I should not directly file a
> bug (where?).
> I tried the following:
>  1. unloading the modules before suspend
>  2. upgrading the bios (which worked marvelously well, but didn't help)
>  3. fiddling with mixer levels and toggles madly
> I have the feeling I have tried all I could, yet there *must* be
> something I am missing, clearly, since I haven't seen a single post out
> there detailing the same problem.
> I am running Debian GNU/Linux "etch":
> Linux mumia 2.6.20-rc6-686 #1 SMP Mon Jan 29 01:10:43 UTC 2007 i686
> GNU/Linux
> un  alsa                      <néant>                  (aucune description n'est disponible)
> ii  alsa-base                 1.0.13-4                  ALSA driver configuration files
> un  alsa-oss                  <néant>                  (aucune description n'est disponible)
> ii  alsa-utils                1.0.13-2                  ALSA utilities
> The sound card is:
>  0 [I82801DBICH4   ]: ICH4 - Intel 82801DB-ICH4
>                       Intel 82801DB-ICH4 with AD1981B at 0xc0000c00, irq 11
> Thanks for any input,
> A.

Bill Sheppard                                 Chief Digital Media Officer
bill.sheppard@sun.com                               Client Software Group
(408) 404-1254 (x68154)                            Sun Microsystems, Inc.