When I built alsa-lib and alsa-utils from the BLFS instructions, audio just didn't work. Then I noticed that "aplay -L" would produce a null list from my own user account, but would show the correct list of PCMs while logged in as root. I fixed this problem by adding my user account to the audio group:
sudo usermod -aG audio $USER I had to log out and back in for the fix to take effect. After this, "aplay -L", and all the other audio functionality (speaker-test, mpg123, etc.) worked fine from my normal user account. It would be helpful to include the above command in: http://linuxfromscratch.org/blfs/view/svn/multimedia/alsa-lib.html At least, this is the case on my sysvinit build of BLFS. Some stuff I read online made me think this isn't needed with systemd, but I'm not sure I understood correctly. I'm learning a lot doing all this stuff. I'm glad LFS/BLFS is available. Thanks! - Don
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