The simplest definition of the bug is that after bootup, the actual state of the emu20k2 hardware is not accurately reflected in the software (alsamixer, alsactl store). The easiest observable effect (in my case) is the PCM Capture switch - it shows off even though it's functioning as if it were on. Other differences between hardware and software may be exist, but I've not detected them (nor have I searched).
Toggling the switch on, then off, fixes the issue and syncs between hardware and software. However, using alsactl restore has no effect even if the configuration being restored contains the instructions to set the switch to off, and even if the "force" parameter is used (which is the default anyway). I wonder if alsactl compares the hardware state to the new state intended and avoids setting the switch value as an "optimization"... I'm testing your latest now, will report its effects. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1133065 Title: Default mixer settings for EMU20K2 enable PCM Input on boot while showing it as disabled Status in “alsa-driver” package in Ubuntu: New Bug description: Upon boot, the EMU20K2's PCM input channel is enabled (unmuted), but it shows as disabled (muted) in alsamixer. One has to enable it and disable it in alsamixer in order to ensure sound does not "leak" out. This is unaffected by alsactl store/restore - even if the asound.state file includes information explicitly turning the PCM input off, alsactl restore fails to automatically fix the issue. One must manually go in and turn PCM input on, then off, to ensure it's really off. This has been the case for a few Ubuntu releases now. I'm reporting it precisely because it seems it's not been reported (or at least, not getting attention). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1133065/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
