On Sun, Oct 28, 2012 at 11:30 AM, Daniel Micay <danielmicay@xxxxxxxxx> wrote: > On Sun, Oct 28, 2012 at 4:26 AM, Dave Morgan > <davemorgan353@xxxxxxxxxxxxxx> wrote: >> >> Hi, >> >> The systemd wiki article says: >> >> "Note: Adding your user to groups (optical, audio, scanner, ...) is not >> necessary with systemd. It might even break the wanted functionality if >> you do so." >> >> What are the the technical reasons for group membership breaking >> functionality when using systemd? >> >> -- >> Dave. > > ConsoleKit implement these session-based ACLs before, and now logind > does. It's not really related to systemd. The reason for avoiding the > audio group is that it can break software mixing. Sound with fast user > switching also won't work at all if users are in the audio group. By the way, I've updated that section in the wiki.[1] It should be a lot clearer now. [1] https://wiki.archlinux.org/index.php/Systemd#Supplementary_information