generic 'problem with sound device'

[Sy Ali]

I have a Plantronics USB headset that I've been using with Skype and
Ekiga (for VoIP)

It stopped working, giving a generic "I don't feel like working" error.

These are the things I've tried:

* restarting the software
* restarting the computer
* checking mixer settings
* restarting alsa, sound, usb, etc
* removing the device, rebooting and inserting it only after
rebooting.  I had issues with the headset being seen if I unplug it
and plug it back in.
* moving the headset to different usb ports
* removing all other usb devices (except my mouse)
* reinstalling the entire distribution, skype and ekiga
* trying a new headset (same brand/model)
* trying a new headset (different brand/model)

I've tried various combinations of the above.  Nothing seems to be
working.  Is there anything that I've overlooked?  How can I
troubleshoot this further?

Can I conclude that this is some kind of hardware issue?  If so - how
in the heck is it so specific?  Everything else sound or USB are all
working just fine.

Is this some kind of issue with having a second sound device?
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