At Sun, 30 Nov 2008 08:22:49 -0800, Dan Nicholson wrote: > > On Sun, Nov 30, 2008 at 1:01 AM, Takashi Iwai <tiwai@xxxxxxx> wrote: > > At Sat, 29 Nov 2008 12:40:02 -0800, > > Dan Nicholson wrote: > >> > >> Hi, > >> > >> Currently, suspending the computer via pm-suspend (as done from HAL), > >> causes the ALSA state to be stored and restored via alsactl. Here's > >> what the hook looks like: > >> > >> http://cgit.freedesktop.org/pm-utils/tree/pm/sleep.d/65alsa > >> > >> Is this still necessary on recent kernels? Is there a list of drivers > >> which properly maintain state across suspend/resume? We're trying to > >> cut down on the amount of work done in userspace which slows down > >> suspend cycles. > > > > The all drivers with PM support should have do store/restore the > > mixer states. For such drivers, calling alsactl is just a waste of > > time. > > Thanks. Which drivers don't have PM support? Many. Look though the kernel tree codes under sound directory that has no suspend and resume callbacks. > > I don't know who introduced it, but maybe it was a workaround... > > Yeah, I'm sure it was a workaround, but we're trying to get rid of the > unnecessary ones now. Even for drivers without PM support, alsactl alone is useless. So I suggest you to remove it. Takashi -- To unsubscribe from this list: send the line "unsubscribe alsa-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
