Had some time this morning to do some trouble shooting based on some feedback, here are the results to your questions and suggestions (which I thank you for by the way!) *"What is the vintage of the computer, and how long has it been in operation? Is this a new "feature" that has appeared after years of use, or is this a new build exhibiting this from the get go?"* Computer is an IBM Lenovo ThinkCentre with a P4 processor, about 5 years old. Has been running as a linux box for over a year. This problem started about 6 months ago, so it was not always an issue. *"I wonder if the computer is logically moving the USB device. When this occurs, what are the results of executing lsusb at the Linux command line after exiting the CLI> prompt? Does it find the URI, and at the address shown in the error (4-1)? (lsusb will have two leading zeros... e.g 004-001)"* [root@QTH_Server ~]# lsusb Bus 004 Device 003: ID 0d8c:013a C-Media Electronics, Inc. Bus 004 Device 001: ID 0000:0000 Bus 005 Device 001: ID 0000:0000 Bus 003 Device 001: ID 0000:0000 Bus 002 Device 001: ID 0000:0000 Bus 001 Device 001: ID 0000:0000 So it appears that the box is moving the device, so I do I fix that? In the error, the location was 4-1 *One test you can make on a functioning system (uri green light flashing) is pull the USB cable from the URI wait a few seconds and plug it back in. If the flashing green does not recover then your SW would not be able to recover from the USB disruptions.* The green light starts flashing like normal after I unplug the USB cable, and plug it back in. Here is the information from the CLI prompt when I do that... [Oct 4 06:35:04] WARNING[4502]: chan_usbradio.c:2073 used_blocks: Error reading output space == Set device 4-1 to usb29912 [Oct 4 06:35:13] WARNING[4503]: chan_usbradio.c:1728 hidthread: Loaded parameters from usbradio_tune_usb29912.conf for device usb29912 . *USB has it?s issues at times. It?s probably not your software but you should update if you haven?t in a while. More likely is the USB bus is getting glitched. There might be an indication of that in dmesg (type dmseg as the Linux prompt).* usb 4-1: usbfs: USBDEVFS_CONTROL failed cmd asterisk rqt 161 rq 1 len 4 ret -71 usb 4-1: USB disconnect, address 2 usb 4-1: new full speed USB device using uhci_hcd and address 3 usb 4-1: configuration #1 chosen from 1 choice input: C-Media Electronics Inc. USB PnP Sound Device as /class/input/input2 input,hidraw0: USB HID v1.00 Device [C-Media Electronics Inc. USB PnP Sound Device] on usb-0000:00:1d.2-1 I did notice that someone or something was trying to "hack" into the box. LOTS of attempts to connect, so I fixed that with a block of the offending IP in iptables, not sure if that has something to do with it or not. Thanks again everyone! -- Steve Denbow | KD8BIW kd8biw@gmail.com www.kd8biw.com