[LAU] Cracking sound via USB (ALSA urb.c:480: frame 5 active: -18)

[david]

Emanuel Rumpf wrote:
> 2011/5/24 Jeremy Jongepier <jeremy at autostatic.com>:
>> You mean you'd like to know which mode a USB soundcard is using or which
>> mode an USB port is using?
>>
> 
> 
> The current mode a soundcard is using. Knowing both would be helpful.
> 
> lsusb gives a hint for the hub mode:
> 
> $ lsusb
> Bus 010 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
> Bus 009 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> 
> $ lsusb -t   # adds information about ideally possible transfer speed.
> /:  Bus 10.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
> /:  Bus 09.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
> /:  Bus 08.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M

You have newer version of lsusb than I. Here, it only dumps the physical 
USB device hierarchy as a tree.

-- 
David
gnome at hawaii.rr.com
authenticity, honesty, community