Red Hat Bugzilla – Bug 322631
Record-only usb audio device not showing under volume control
Last modified: 2007-11-30 17:12:17 EST
Description of problem:
I have a TV tuner with an audio in capability, but even though it does appear in
hal-device-manager with both alsa and oss control devices, and does appear under
sound preferences under Audio Conferencing - sound capture as "USB Audio" (which
is a poor name in my view given that the device does have a name provided via
usb), it does not appear under volume control in any mixers at all, and is not
listed under File/Change Device.
I would expect the input volume to be configurable via volume control.
Version-Release number of selected component (if applicable):
> "USB Audio" (which is a poor name in my view given that the device does have a
> name provided via usb)
ALSA provides the device's name. Check the output of /proc/asound/cards to see
what name is given.
Could you please give the output of "amixer -c X" where X is the card number for
I trust this is the info you need:
[root@Vigor11 ~]# cat /proc/asound/cards
0 [ICH5 ]: ICH4 - Intel ICH5
Intel ICH5 with ALC650F at irq 17
1 [default ]: USB-Audio - TV USB2.0
AVerMedia TV USB2.0 at usb-0000:00:1d.7-5, high speed
2 [Modem ]: ICH-MODEM - Intel ICH5 Modem
Intel ICH5 Modem at irq 17
[root@Vigor11 ~]# amixer -c 1
Your device doesn't have any ALSA controls.
Created attachment 219601 [details]
screen shot of hal-device-manager showing alsa control device
What do you make of the output of hal-device-manager then as I attach?
(In reply to comment #4)
> Created an attachment (id=219601) 
> screen shot of hal-device-manager showing alsa control device
> What do you make of the output of hal-device-manager then as I attach?
Looks like ALSA only handles one of the interfaces on the device (probably the
Control Device), and not the Capture one. Looks like a driver bug.