I have two USB headsets (Logitech Inc Logitech Stereo H650e and Jabra Jabra UC VOICE 550a) who both causes lots of:
usb 1-2: 1:1: cannot set freq 44100 to ep 0x81
errors when using them for pidgin audio chats. The actual freq varies though.
I found that adding a small delay here: diff -u sound/usb/clock.c.org sound/usb/clock.c --- sound/usb/clock.c.org 2017-08-18 14:38:05.597977669 +0200 +++ sound/usb/clock.c 2017-08-18 14:20:14.653661513 +0200 @@ -304,6 +304,7 @@ iface, fmt->altsetting, rate, ep); return err; } + msleep(1);
/* Don't check the sample rate for devices which we know don't * support reading */
it seems one cannot do these settings too fast Ant better idea for a fix? kernel 4.9.44
Jocke
PS. When starting a chat with pidgin-sipe, I see the same sample rate freq setting twice, not sure where that comes from.