On 10/11/20 14:37, Roy Dean via AMSAT-BB wrote:

And after running GQRX, there are hundreds of these comments after running "dmesg":

[ 332.396482] usb 1-1.2: cannot submit urb 0, error -28: not enough bandwidth

Might be a USB Host scheduler bug, indicating that something wanted to talk to a USB device, but the kernel thought it didn't have enough of the 12 Mbit/sec (or 480 Mbit/sec in USB2.0 HS, or something GBit/sec in SuperSpeed, etc.) bus to satisfy the request.

urb stands for "USB Request Block", which is how some kernel device driver sends requests, to read/write the actual USB device, within the kernel.

[ 90.010218] usb 1-1.2: 1:1: cannot get freq at ep 0x81

This message originates in sound/usb/clock.c, apparently trying to read the sample rate from endpoint 0x01 (the high bit set denotes IN to Host). From the comment:

return 0; /* some devices don't support reading */

However, this appears to be non-fatal.

I'd suggest trying another version of Linux, if possible.

The FCDP+ works on FreeBSD, with one annoying HID quirk that I've been trying to get the FCD programmer to fix for a few years now. I need to email him directly again and see if he can update the firmware.

--- Zach N0ZGO