I am a Newbie running Ubuntu 9.04. I have no problems with the sound card, however, when I connect a PD552 USB sound adapter into a 4 port hub in order to use headphones it simply doesn't work. I posted the problem on the Ubuntu site and received a suggestion to run lsusb from a terminal. I did this but never received any other replies addressing the issue.

This is what I receive from the command. It shows up as device 7 but I have no idea of what my next steps are to insure it will work.

~$ lsusb
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 007: ID 1130:f211 Tenx Technology, Inc. USB audio headset
Bus 001 Device 003: ID 0930:653e Toshiba Corp. USB Flash Memory
Bus 001 Device 002: ID 050d:0234 Belkin Components F5U234 USB 2.0 4-Port Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Any help would be appreciated.

Try plugging it in directly (not into the hub)
Try plugging it into a powered hub.
Take a look at the output of lsusb -v (Please don't post it all here). How much current does your audio headset want to take?

Connecting it directly to a computer USB port made no difference. Running the suggested lsusb -v command showed a max power of 500ma.

When plugged into a powered 4 port Belkin USB Hub max power shown is 2ma.

I am out of ideas, and do not have the hardware that is causing you problems, so it is difficult for me to help you.

This link may help: http://www.linuxquestions.org/questi...41#post3186541

When you read that thread, please substitute "USB Speakers" for "USB Headphones". You may have to experiment a bit.

Good luck.

Which version of alsa are you running?
cat /proc/asound/version

Should give the version.

Command cat /proc/asound/version came back with:
Version 1.0.18rc3

I had to upgrade to 1.0.20 to get my USB sound card to work, currently using 1.0.20-git20090509. I'm not exactly sure how best to do this in Ubuntu I suggest you try google, it might be as simple as adding a new source to apt or something. Otherwise it can be done from source.

Hey, any news on the device? I'm using Ubuntu, too and have no idea how to get it work.

My USB sounds has been fine for a long while now. What version of Ubuntu are you using?