Um das Problem einkreisen zu können, müsste ich erst mal wissen wie die vorhandene Soundausgabe läuft.
Im xfce4-Mixer habe ich eine einzige Soundkarte zur Auswahl, die "Realtek ALC888 (OSS Mixer)". Deren "Volume"-Einstellung hat Auswirkungen auf die Lautstärke. Heißt das, mein Ubuntu nutzt OSS?
Und wieso Realtek ALC888, die Soundkarte in meinem Rechner ist doch von NVidia:
alex@flipper:~$ lspci |grep -i audio
00:07.0 Audio device: nVidia Corporation MCP72XE/MCP72P/MCP78U/MCP78S High Definition Audio (rev a1)
Außerdem habe ich mir mal /proc/asound/ angeschaut, werde aber nicht schlau draus:
alex@flipper:~$ find /proc/asound/
/proc/asound/
/proc/asound/U0x46d0x8da
/proc/asound/card1
/proc/asound/card1/oss_mixer
/proc/asound/card1/id
/proc/asound/card1/usbbus
/proc/asound/card1/usbid
/proc/asound/card1/stream0
/proc/asound/card1/pcm0c
/proc/asound/card1/pcm0c/oss
/proc/asound/card1/pcm0c/sub0
/proc/asound/card1/pcm0c/sub0/status
/proc/asound/card1/pcm0c/sub0/sw_params
/proc/asound/card1/pcm0c/sub0/hw_params
/proc/asound/card1/pcm0c/sub0/info
/proc/asound/card1/pcm0c/info
/proc/asound/hwdep
/proc/asound/NVidia
/proc/asound/card0
/proc/asound/card0/oss_mixer
/proc/asound/card0/id
/proc/asound/card0/codec#0
/proc/asound/card0/pcm2c
/proc/asound/card0/pcm2c/sub0
/proc/asound/card0/pcm2c/sub0/prealloc_max
/proc/asound/card0/pcm2c/sub0/prealloc
/proc/asound/card0/pcm2c/sub0/status
/proc/asound/card0/pcm2c/sub0/sw_params
/proc/asound/card0/pcm2c/sub0/hw_params
/proc/asound/card0/pcm2c/sub0/info
/proc/asound/card0/pcm2c/info
/proc/asound/card0/pcm1p
/proc/asound/card0/pcm1p/oss
/proc/asound/card0/pcm1p/sub0
/proc/asound/card0/pcm1p/sub0/prealloc_max
/proc/asound/card0/pcm1p/sub0/prealloc
/proc/asound/card0/pcm1p/sub0/status
/proc/asound/card0/pcm1p/sub0/sw_params
/proc/asound/card0/pcm1p/sub0/hw_params
/proc/asound/card0/pcm1p/sub0/info
/proc/asound/card0/pcm1p/info
/proc/asound/card0/pcm0c
/proc/asound/card0/pcm0c/oss
/proc/asound/card0/pcm0c/sub0
/proc/asound/card0/pcm0c/sub0/prealloc_max
/proc/asound/card0/pcm0c/sub0/prealloc
/proc/asound/card0/pcm0c/sub0/status
/proc/asound/card0/pcm0c/sub0/sw_params
/proc/asound/card0/pcm0c/sub0/hw_params
/proc/asound/card0/pcm0c/sub0/info
/proc/asound/card0/pcm0c/info
/proc/asound/card0/pcm0p
/proc/asound/card0/pcm0p/oss
/proc/asound/card0/pcm0p/sub0
/proc/asound/card0/pcm0p/sub0/prealloc_max
/proc/asound/card0/pcm0p/sub0/prealloc
/proc/asound/card0/pcm0p/sub0/status
/proc/asound/card0/pcm0p/sub0/sw_params
/proc/asound/card0/pcm0p/sub0/hw_params
/proc/asound/card0/pcm0p/sub0/info
/proc/asound/card0/pcm0p/info
/proc/asound/pcm
/proc/asound/timers
/proc/asound/modules
/proc/asound/cards
/proc/asound/devices
/proc/asound/version
/proc/asound/seq
/proc/asound/seq/oss
/proc/asound/seq/timer
/proc/asound/seq/clients
/proc/asound/seq/queues
/proc/asound/seq/drivers
/proc/asound/oss
/proc/asound/oss/sndstat
/proc/asound/oss/devices