On Tue, 1 Jan 2013, Shawn Lewis wrote: > Sure. These are from playing a 100Hz sine wave tone over the USB sound card. > > This is with the wifi device disabled (meaning its not present in > ifconfig's output, no wifi interrupts occur). No audible pops occurred > in this sample. > http://dl.dropbox.com/u/324766/usb-popping/usbmon-100Hz-nowifi.txt > > This is with the wifi device enabled (present in ifconfig's output, > hundreds of wifi interrupts per second) and wifi traffic being > generated by ping flooding. Audible pops occurred frequently (up to a > few times per second) in this sample. > http://dl.dropbox.com/u/324766/usb-popping/usbmon-100Hz-wifi.txt The "wifi" usbmon trace doesn't show anything wrong. All the data was sent to the driver in plenty of time and all the transfers completely normally, when they were supposed to. Maybe the analyzer trace will be more fruitful. Just because the driver got its data in time doesn't mean the data appeared on the wire. You said something about partial packets; what happened there? Also, can you post the portion of /sys/kernel/debug/usb/devices that describes the sound card? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
