Not sure exactly where to post this question, but this forum doesn't seem too far off.
For two builds (F23 and F24, IIRC), I could not get alsamixer to save it's settings. Using F6 under alsamixer, it's not clear what the default is, but when I select the correct sound card, I always find my headphone output is muted.
The command alsactl store is supposed to save the settings. It did for me once (and forever more) in F25, until I re-installed F25 last month when I replaced my hard drive. Now I can't get the settings to stick across reboots. Selecting the right soundcard and turning on output for the headphones is now a habit.
I tried that alsactl command under root and rebooted to no effect. Under the usual user logon, I get the following error:
$ file /var/lib/alsa/asound.state lock error: File exists
Should I delete the file and try again? Are there any work-arounds?