[amsat-bb] Funcube Dongle Pro+ w/GQRX (Ubuntu)

[Zach Metzinger]

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