Messages in this thread | | | Date | Sat, 3 Apr 2004 17:22:28 +0200 | From | Pavel Machek <> | Subject | Re: alsamixer muting when restoring from suspend. |
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Hi!
> > > > This I think is not a problem but rather a subtle bug. > > > > > > > > Alsamixer by default mutes all channels when loaded. > > > > So when I `swsusp' my comp while I listen to music and restore the music > > > > plays from where it left alright, but the channels are muted. > > > > Is there a way to unmute them implicitly when restoring. > > > > > > which driver? > > > not all drivers have suspend/resume callbacks. > > > > Could it be solved at higher layer, perhaps? Setting volume is common > > to all drivers, and some kind of generic_alsa_suspend every alsa > > driver would call might help... > > the problem is also that you need to reinitialize the chip after > resume. the restoration of mixer config could be done by calling > "alsactl store" at the suspend and "alsactl restore" at the resume in > the user space. can apmd work for such a purpose even for software > suspend?
Userspace should not be involved in suspend/resume. Having in-kernel equivalent of alsactl store / alsactl restore might help alsa driver authors... And might be enough for suspend-to-disk to +/- work. (Well, unless sound was playing when user requested suspend, that one needs proper support).
Pavel -- When do you have a heart between your knees? [Johanka's followup: and *two* hearts?] - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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