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

From: Emanuel Rumpf <xbran@email-addr-hidden>
Date: Tue May 24 2011 - 23:53:00 EEST

2011/5/24 Jeremy Jongepier <jeremy@email-addr-hidden>:
>
> 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 

-- 
E.R.
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Received on Wed May 25 00:15:10 2011

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