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[Antonio Lopez <amlopezalonso@xxxxxxxxx>]

Public bug reported:

The Z-5 are USB-powered speakers, behaving optionally as a standalone
external USB audio card (having its audio input through the same USB
power wire) or as a pair of passive speakers when using a normal audio
jack.

First I had to append the following to /etc/modprobe.d/alsa-base.conf in
order for the speakers to be "properly" detected:

options snd-usb-audio index=0

Then the Z-5 seem to be detected by the USB subsystem only after
alternative reboots/shutdowns, as lsusb command shows. They work
normally when using a standard audio jack through the MB sound system
(Azalia), though.

I shall provide any additional debugging info upon request.

** Affects: mythbuntu
     Importance: Undecided
         Status: New

-- 
Logitech Z-5 USB speakers sometimes not detected
https://bugs.launchpad.net/bugs/584680
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Status in Mythbuntu, Ubuntu derivative focused upon MythTV: New

Bug description:
The Z-5 are USB-powered speakers, behaving optionally as a standalone external USB audio card (having its audio input through the same USB power wire) or as a pair of passive speakers when using a normal audio jack.

First I had to append the following to /etc/modprobe.d/alsa-base.conf in order for the speakers to be "properly" detected:

options snd-usb-audio index=0

Then the Z-5 seem to be detected by the USB subsystem only after alternative reboots/shutdowns, as lsusb command shows. They work normally when using a standard audio jack through the MB sound system (Azalia), though.

I shall provide any additional debugging info upon request.