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#1 2013-05-11 21:36:58

dly
Member
Registered: 2013-05-11
Posts: 1

LXDE + LXDM UserSwitch + group(audio) + SoundSubsys fails for 2n

I'd like to report a rather unexpected behavior that was a bit undocumented in the (generally remarkable and excellent) Arch Wiki.

Situation is in my system:

  • Arch + systemd + LXDE (lxsession + openbox) (X autostarts)

  • NO pulseaudio (only libpulse installed), NO oss (in kernel modules), only ALSA for audio

  • LXDM user switching is used (/usr/sbin/lxdm -c USER_SWITCH)

  • Two users are active (both members of group 'users' primarily)

  • NO user is member of group 'audio'

With the above configuration, only the first user (any of the two) logged in X has audio. The second one cannot even access alsamixer, and all sound-dependent functionalities fail.

The situation is corrected fully if both accounts become members of the 'audio' group with:

usermod -a -G audio <user>

Note: I have never tried to make pulseaudio work...

Hardware is: laptop Toshiba U300-13J 2GB RAM
Output of lspci, lsmod, and pacman is linked (last pacman -Syu May-10 2013 -- today)

I just have the feeling that this behavior should be easily reproducible with any hardware that has similar configuration, and might have a place in the X user switching wiki sections (LXDM setup, or references to 'audio' group not supposed to be used...)

I would like to understand whether I am correctly using the 'audio' group for this situation, or there's another proper way to make this work.

Thanks!

dly

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