Public bug reported:
Ubuntu 10.04 LTS - Lucid Lynx
cx88_alsa, usb-audio
I use an USB-audio-interface and a cx88-TV-card.
Out of the box sound doesn't work with many applications like vlc or zapping
because there is no alsa-default-device specified. No sound can be heared.
(Other applications, totem for instance, work.)
Some applications throw errors not finding a mixer device. For example
alsamixer does so if started without a command-line-parameter specifying the
device.
The reason can be found in /etc/modprobe.d/alsa-base.conf
The following section is to blame:
# Prevent abnormal drivers from grabbing index 0
options bt87x index=-2
options cx88_alsa index=-2
options saa7134-alsa index=-2
options snd-atiixp-modem index=-2
options snd-intel8x0m index=-2
options snd-via82xx-modem index=-2
options snd-usb-audio index=-2
options snd-usb-us122l index=-2
options snd-usb-usx2y index=-2
options snd-usb-caiaq index=-2
If there are only those "abnormal drivers" in use alsa starts counting the
devices by 1 instead of zero.
Therefore there is no ALSA-default-device causing the mentioned problems.
Workaround: Uncomment the appropriate line. For me it's the usb-audio-
line
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: alsa alsa-base.conf default-device usb-audio
** Description changed:
Ubuntu 10.04 LTS - Lucid Lynx
cx88_alsa, usb-audio
I use an USB-audio-interface and a cx88-TV-card.
- Out of the box sound doesn't work with many applications like vlc or zapping
as there is no alsa-default-device specified. No sond can be heared. (Other
applications, totem for instance, work.)
+ Out of the box sound doesn't work with many applications like vlc or zapping
because there is no alsa-default-device specified. No sound can be heared.
(Other applications, totem for instance, work.)
Some applications throw errors not finding a mixer device. For example
alsamixer does so if started without a command-line-parameter specifying the
device.
The reason can be found in /etc/modprobe.d/alsa-base.conf
The following section is to blame:
# Prevent abnormal drivers from grabbing index 0
options bt87x index=-2
options cx88_alsa index=-2
options saa7134-alsa index=-2
options snd-atiixp-modem index=-2
options snd-intel8x0m index=-2
options snd-via82xx-modem index=-2
options snd-usb-audio index=-2
options snd-usb-us122l index=-2
options snd-usb-usx2y index=-2
options snd-usb-caiaq index=-2
If there are only those "abnormal drivers" in use alsa starts counting the
devices by 1 instead of zero.
Therefore there is no ALSA-default-device causing the mentioned problems.
Workaround: Uncomment the appropriate line. For me it's the usb-audio-
line
--
no default ALSA-device
https://bugs.launchpad.net/bugs/650665
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